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webkit / WebKit / 7d2893b1ebf4764d6073d000ac0bd47fe8e54f16 / . / LayoutTests / media / track / opera / resources / idlharness.js
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/*
Distributed under both the W3C Test Suite License [1] and the W3C
3-clause BSD License [2]. To contribute to a W3C Test Suite, see the
policies and contribution forms [3].
[1] http://www.w3.org/Consortium/Legal/2008/04-testsuite-license
[2] http://www.w3.org/Consortium/Legal/2008/03-bsd-license
[3] http://www.w3.org/2004/10/27-testcases
*/
/*
* This file automatically generates browser tests for WebIDL interfaces, using
* the testharness.js framework. To use, first include the following:
*
* <script src=/resources/testharness.js></script>
* <script src=/resources/testharnessreport.js></script>
* <script src=/resources/WebIDLParser.js></script>
* <script src=/resources/idlharness.js></script>
*
* Then you'll need some type of IDLs. Here's some script that can be run on a
* spec written in HTML, which will grab all the elements with class="idl",
* concatenate them, and replace the body so you can copy-paste:
*
var s = "";
[].forEach.call(document.getElementsByClassName("idl"), function(idl) {
//https://www.w3.org/Bugs/Public/show_bug.cgi?id=14914
if (!idl.classList.contains("extract"))
{
s += idl.textContent + "\n\n";
}
});
document.body.innerHTML = '<pre></pre>';
document.body.firstChild.textContent = s;
*
* (TODO: write this in Python or something so that it can be done from the
* command line instead.)
*
* Once you have that, put it in your script somehow. The easiest way is to
* embed it literally in an HTML file with <script type=text/plain> or similar,
* so that you don't have to do any escaping. Another possibility is to put it
* in a separate .idl file that's fetched via XHR or similar. Sample usage:
*
* var idl_array = new IdlArray();
* idl_array.add_untested_idls("interface Node { readonly attribute DOMString nodeName; };");
* idl_array.add_idls("interface Document : Node { readonly attribute DOMString URL; };");
* idl_array.add_objects({Document: ["document"]});
* idl_array.test();
*
* This tests that window.Document exists and meets all the requirements of
* WebIDL. It also tests that window.document (the result of evaluating the
* string "document") has URL and nodeName properties that behave as they
* should, and otherwise meets WebIDL's requirements for an object whose
* primary interface is Document. It does not test that window.Node exists,
* which is what you want if the Node interface is already tested in some other
* specification's suite and your specification only extends or refers to it.
* Of course, each IDL string can define many different things, and calls to
* add_objects() can register many different objects for different interfaces:
* this is a very simple example.
*
* TODO: Write assert_writable, assert_enumerable, assert_configurable and
* their inverses, and use those instead of just checking
* getOwnPropertyDescriptor.
*
* == Public methods of IdlArray ==
*
* IdlArray objects can be obtained with new IdlArray(). Anything not
* documented in this section should be considered an implementation detail,
* and outside callers should not use it.
*
* add_idls(idl_string):
* Parses idl_string (throwing on parse error) and adds the results to the
* IdlArray. All the definitions will be tested when you run test(). If
* some of the definitions refer to other definitions, those must be present
* too. For instance, if idl_string says that Document inherits from Node,
* the Node interface must also have been provided in some call to add_idls()
* or add_untested_idls().
*
* add_untested_idls(idl_string):
* Like add_idls(), but the definitions will not be tested. If an untested
* interface is added and then extended with a tested partial interface, the
* members of the partial interface will still be tested. Also, all the
* members will still be tested for objects added with add_objects(), because
* you probably want to test that (for instance) window.document has all the
* properties from Node, not just Document, even if the Node interface itself
* is tested in a different test suite.
*
* add_objects(dict):
* dict should be an object whose keys are the names of interfaces or
* exceptions, and whose values are arrays of strings. When an interface or
* exception is tested, every string registered for it with add_objects()
* will be evaluated, and tests will be run on the result to verify that it
* correctly implements that interface or exception. This is the only way to
* test anything about [NoInterfaceObject] interfaces, and there are many
* tests that can't be run on any interface without an object to fiddle with.
*
* The interface has to be the *primary* interface of all the objects
* provided. For example, don't pass {Node: ["document"]}, but rather
* {Document: ["document"]}. Assuming the Document interface was declared to
* inherit from Node, this will automatically test that document implements
* the Node interface too.
*
* Warning: methods will be called on any provided objects, in a manner that
* WebIDL requires be safe. For instance, if a method has mandatory
* arguments, the test suite will try calling it with too few arguments to
* see if it throws an exception. If an implementation incorrectly runs the
* function instead of throwing, this might have side effects, possibly even
* preventing the test suite from running correctly.
*
* prevent_multiple_testing(name):
* This is a niche method for use in case you're testing many objects that
* implement the same interfaces, and don't want to retest the same
* interfaces every single time. For instance, HTML defines many interfaces
* that all inherit from HTMLElement, so the HTML test suite has something
* like
* .add_objects({
* HTMLHtmlElement: ['document.documentElement'],
* HTMLHeadElement: ['document.head'],
* HTMLBodyElement: ['document.body'],
* ...
* })
* and so on for dozens of element types. This would mean that it would
* retest that each and every one of those elements implements HTMLElement,
* Element, and Node, which would be thousands of basically redundant tests.
* The test suite therefore calls prevent_multiple_testing("HTMLElement").
* This means that once one object has been tested to implement HTMLElement
* and its ancestors, no other object will be. Thus in the example code
* above, the harness would test that document.documentElement correctly
* implements HTMLHtmlElement, HTMLElement, Element, and Node; but
* document.head would only be tested for HTMLHeadElement, and so on for
* further objects.
*
* test():
* Run all tests. This should be called after you've called all other
* methods to add IDLs and objects.
*/
/**
* Notes for people who want to edit this file (not just use it as a library):
*
* Most of the interesting stuff happens in the derived classes of IdlObject,
* especially IdlInterface. The entry point for all IdlObjects is .test(),
* which is called by IdlArray.test(). An IdlObject is conceptually just
* "thing we want to run tests on", and an IdlArray is an array of IdlObjects
* with some additional data thrown in.
*
* The object model is based on what WebIDLParser.js produces, which is in turn
* based on its pegjs grammar. If you want to figure out what properties an
* object will have from WebIDLParser.js, the best way is to look at the
* grammar:
*
* https://github.com/darobin/webidl.js/blob/master/lib/grammar.peg
*
* So for instance:
*
* // interface definition
* interface
* = extAttrs:extendedAttributeList? S? "interface" S name:identifier w herit:ifInheritance? w "{" w mem:ifMember* w "}" w ";" w
* { return { type: "interface", name: name, inheritance: herit, members: mem, extAttrs: extAttrs }; }
*
* This means that an "interface" object will have a .type property equal to
* the string "interface", a .name property equal to the identifier that the
* parser found, an .inheritance property equal to either null or the result of
* the "ifInheritance" production found elsewhere in the grammar, and so on.
* After each grammatical production is a JavaScript function in curly braces
* that gets called with suitable arguments and returns some JavaScript value.
*
* (Note that the version of WebIDLParser.js we use might sometimes be
* out-of-date or forked.)
*
* The members and methods of the classes defined by this file are all at least
* briefly documented, hopefully.
*/
"use strict";
(function(){
/// IdlArray ///
// Entry point
window.IdlArray = function()
//@{
{
/**
* A map from strings to the corresponding named IdlObject, such as
* IdlInterface or IdlException. These are the things that test() will run
* tests on.
*/
this.members = {};
/**
* A map from strings to arrays of strings. The keys are interface or
* exception names, and are expected to also exist as keys in this.members
* (otherwise they'll be ignored). This is populated by add_objects() --
* see documentation at the start of the file. The actual tests will be
* run by calling this.members[name].test_object(obj) for each obj in
* this.objects[name]. obj is a string that will be eval'd to produce a
* JavaScript value, which is supposed to be an object implementing the
* given IdlObject (interface, exception, etc.).
*/
this.objects = {};
/**
* When adding multiple collections of IDLs one at a time, an earlier one
* might contain a partial interface or implements statement that depends
* on a later one. Save these up and handle them right before we run
* tests.
*
* .partials is simply an array of objects from WebIDLParser.js'
* "partialinterface" production. .implements maps strings to arrays of
* strings, such that
*
* A implements B;
* A implements C;
* D implements E;
*
* results in { A: ["B", "C"], D: ["E"] }.
*/
this.partials = [];
this.implements = {};
}
//@}
IdlArray.prototype.add_idls = function(raw_idls)
//@{
{
/** Entry point. See documentation at beginning of file. */
this.internal_add_idls(WebIDLParser.parse(raw_idls));
};
//@}
IdlArray.prototype.add_untested_idls = function(raw_idls)
//@{
{
/** Entry point. See documentation at beginning of file. */
var parsed_idls = WebIDLParser.parse(raw_idls);
for (var i = 0; i < parsed_idls.length; i++)
{
parsed_idls[i].untested = true;
if ("members" in parsed_idls[i])
{
for (var j = 0; j < parsed_idls[i].members.length; j++)
{
parsed_idls[i].members[j].untested = true;
}
}
}
this.internal_add_idls(parsed_idls);
}
//@}
IdlArray.prototype.internal_add_idls = function(parsed_idls)
//@{
{
/**
* Internal helper called by add_idls() and add_untested_idls().
* parsed_idls is an array of objects that come from WebIDLParser.js's
* "definitions" production. The add_untested_idls() entry point
* additionally sets an .untested property on each object (and its
* .members) so that they'll be skipped by test() -- they'll only be
* used for base interfaces of tested interfaces, return types, etc.
*/
parsed_idls.forEach(function(parsed_idl)
{
if (parsed_idl.type == "partialinterface")
{
this.partials.push(parsed_idl);
return;
}
if (parsed_idl.type == "implements")
{
if (!(parsed_idl.target in this.implements))
{
this.implements[parsed_idl.target] = [];
}
this.implements[parsed_idl.target].push(parsed_idl.implements);
return;
}
parsed_idl.array = this;
if (parsed_idl.name in this.members)
{
throw "Duplicate identifier " + parsed_idl.name;
}
switch(parsed_idl.type)
{
case "interface":
this.members[parsed_idl.name] = new IdlInterface(parsed_idl);
break;
case "exception":
this.members[parsed_idl.name] = new IdlException(parsed_idl);
break;
case "dictionary":
// Nothing to test, but we need the dictionary info around for type
// checks
this.members[parsed_idl.name] = new IdlDictionary(parsed_idl);
break;
case "typedef":
// TODO
break;
case "enum":
// TODO
break;
default:
throw parsed_idl.name + ": " + parsed_idl.type + " not yet supported";
}
}.bind(this));
}
//@}
IdlArray.prototype.add_objects = function(dict)
//@{
{
/** Entry point. See documentation at beginning of file. */
for (var k in dict)
{
if (k in this.objects)
{
this.objects[k] = this.objects[k].concat(dict[k]);
}
else
{
this.objects[k] = dict[k];
}
}
}
//@}
IdlArray.prototype.prevent_multiple_testing = function(name)
//@{
{
/** Entry point. See documentation at beginning of file. */
this.members[name].prevent_multiple_testing = true;
}
//@}
IdlArray.prototype.recursively_get_implements = function(interface_name)
//@{
{
/**
* Helper function for test(). Returns an array of things that implement
* interface_name, so if the IDL contains
*
* A implements B;
* B implements C;
* B implements D;
*
* then recursively_get_implements("A") should return ["B", "C", "D"].
*/
var ret = this.implements[interface_name];
if (ret === undefined)
{
return [];
}
for (var i = 0; i < this.implements[interface_name].length; i++)
{
ret = ret.concat(this.recursively_get_implements(ret[i]));
if (ret.indexOf(ret[i]) != ret.lastIndexOf(ret[i]))
{
throw "Circular implements statements involving " + ret[i];
}
}
return ret;
}
//@}
IdlArray.prototype.test = function()
//@{
{
/** Entry point. See documentation at beginning of file. */
// First merge in all the partial interfaces and implements statements we
// encountered.
this.partials.forEach(function(parsed_idl)
{
if (!(parsed_idl.name in this.members)
|| !(this.members[parsed_idl.name] instanceof IdlInterface))
{
throw "Partial interface " + parsed_idl.name + " with no original interface";
}
if (parsed_idl.extAttrs)
{
parsed_idl.extAttrs.forEach(function(extAttr)
{
this.members[parsed_idl.name].extAttrs.push(extAttr);
}.bind(this));
}
parsed_idl.members.forEach(function(member)
{
this.members[parsed_idl.name].members.push(new IdlInterfaceMember(member));
}.bind(this));
}.bind(this));
this.partials = [];
for (var lhs in this.implements)
{
this.recursively_get_implements(lhs).forEach(function(rhs)
{
if (!(lhs in this.members)
|| !(this.members[lhs] instanceof IdlInterface)
|| !(rhs in this.members)
|| !(this.members[rhs] instanceof IdlInterface))
{
throw lhs + " implements " + rhs + ", but one is undefined or not an interface";
}
this.members[rhs].members.forEach(function(member)
{
this.members[lhs].members.push(new IdlInterfaceMember(member));
}.bind(this));
}.bind(this));
}
this.implements = {};
// Now run test() on every member, and test_object() for every object.
for (var name in this.members)
{
this.members[name].test();
if (name in this.objects)
{
this.objects[name].forEach(function(str)
{
this.members[name].test_object(str);
}.bind(this));
}
}
};
//@}
IdlArray.prototype.assert_type_is = function(value, type)
//@{
{
/**
* Helper function that tests that value is an instance of type according
* to the rules of WebIDL. value is any JavaScript value, and type is an
* object produced by WebIDLParser.js' "type" production. That production
* is fairly elaborate due to the complexity of WebIDL's types, so it's
* best to look at the grammar to figure out what properties it might have.
*/
if (type.idlType == "any")
{
// No assertions to make
return;
}
if (type.nullable && value === null)
{
// This is fine
return;
}
if (type.array)
{
// TODO: not supported yet
return;
}
if (type.sequence)
{
assert_true(Array.isArray(value), "is not array");
if (!value.length)
{
// Nothing we can do.
return;
}
this.assert_type_is(value[0], type.idlType.idlType);
return;
}
type = type.idlType;
switch(type)
{
case "void":
assert_equals(value, undefined);
return;
case "boolean":
assert_equals(typeof value, "boolean");
return;
case "byte":
assert_equals(typeof value, "number");
assert_equals(value, Math.floor(value), "not an integer");
assert_true(-128 <= value && value <= 127, "byte " + value + " not in range [-128, 127]");
return;
case "octet":
assert_equals(typeof value, "number");
assert_equals(value, Math.floor(value), "not an integer");
assert_true(0 <= value && value <= 255, "octet " + value + " not in range [0, 255]");
return;
case "short":
assert_equals(typeof value, "number");
assert_equals(value, Math.floor(value), "not an integer");
assert_true(-32768 <= value && value <= 32767, "short " + value + " not in range [-32768, 32767]");
return;
case "unsigned short":
assert_equals(typeof value, "number");
assert_equals(value, Math.floor(value), "not an integer");
assert_true(0 <= value && value <= 65535, "unsigned short " + value + " not in range [0, 65535]");
return;
case "long":
assert_equals(typeof value, "number");
assert_equals(value, Math.floor(value), "not an integer");
assert_true(-2147483648 <= value && value <= 2147483647, "long " + value + " not in range [-2147483648, 2147483647]");
return;
case "unsigned long":
assert_equals(typeof value, "number");
assert_equals(value, Math.floor(value), "not an integer");
assert_true(0 <= value && value <= 4294967295, "unsigned long " + value + " not in range [0, 4294967295]");
return;
case "long long":
assert_equals(typeof value, "number");
return;
case "unsigned long long":
assert_equals(typeof value, "number");
assert_true(0 <= value, "unsigned long long is negative");
return;
case "float":
case "double":
// TODO: distinguish these cases
assert_equals(typeof value, "number");
return;
case "DOMString":
assert_equals(typeof value, "string");
return;
case "object":
assert_true(typeof value == "object" || typeof value == "function", "wrong type: not object or function");
return;
}
if (!(type in this.members))
{
throw "Unrecognized type " + type;
}
if (this.members[type] instanceof IdlInterface)
{
// We don't want to run the full
// IdlInterface.prototype.test_instance_of, because that could result
// in an infinite loop. TODO: This means we don't have tests for
// NoInterfaceObject interfaces, and we also can't test objects that
// come from another window.
assert_true(typeof value == "object" || typeof value == "function", "wrong type: not object or function");
if (value instanceof Object
&& !this.members[type].has_extended_attribute("NoInterfaceObject")
&& type in window)
{
assert_true(value instanceof window[type], "not instanceof " + type);
}
}
else if (this.members[type] instanceof IdlDictionary)
{
// TODO: Test when we actually have something to test this on
}
else
{
throw "Type " + type + " isn't an interface or dictionary";
}
};
//@}
/// IdlObject ///
function IdlObject() {}
IdlObject.prototype.test = function()
//@{
{
/**
* By default, this does nothing, so no actual tests are run for IdlObjects
* that don't define any (e.g., IdlDictionary at the time of this writing).
*/
};
//@}
IdlObject.prototype.has_extended_attribute = function(name)
//@{
{
/**
* This is only meaningful for things that support extended attributes,
* such as interfaces, exceptions, and members.
*/
return this.extAttrs.some(function(o)
{
return o.name == name;
});
};
//@}
/// IdlDictionary ///
// Used for IdlArray.prototype.assert_type_is
function IdlDictionary(obj)
//@{
{
/**
* obj is an object produced by the WebIDLParser.js "dictionary"
* production.
*/
/** Self-explanatory. */
this.name = obj.name;
/** An array of objects produced by the "dictionaryMember" production. */
this.members = obj.members;
/**
* The name (as a string) of the dictionary type we inherit from, or null
* if there is none.
*/
if (obj.inheritance.length > 1) {
throw "Multiple inheritance is no longer supported in WebIDL";
}
this.base = obj.inheritance.length ? obj.inheritance[0] : null;
}
//@}
IdlDictionary.prototype = Object.create(IdlObject.prototype);
/// IdlExceptionOrInterface ///
// Code sharing!
function IdlExceptionOrInterface(obj)
//@{
{
/**
* obj is an object produced by the WebIDLParser.js "exception" or
* "interface" production, as appropriate.
*/
/** Self-explanatory. */
this.name = obj.name;
/** A back-reference to our IdlArray. */
this.array = obj.array;
/**
* An indicator of whether we should run tests on the (exception) interface
* object and (exception) interface prototype object. Tests on members are
* controlled by .untested on each member, not this.
*/
this.untested = obj.untested;
/** An array of objects produced by the "ExtAttr" production. */
this.extAttrs = obj.extAttrs;
/** An array of IdlInterfaceMembers. */
this.members = obj.members.map(function(m){return new IdlInterfaceMember(m)});
/**
* The name (as a string) of the type we inherit from, or null if there is
* none.
*/
if (obj.inheritance.length > 1) {
throw "Multiple inheritance is no longer supported in WebIDL";
}
this.base = obj.inheritance.length ? obj.inheritance[0] : null;
}
//@}
IdlExceptionOrInterface.prototype = Object.create(IdlObject.prototype);
IdlExceptionOrInterface.prototype.test = function()
//@{
{
if (this.has_extended_attribute("NoInterfaceObject"))
{
// No tests to do without an instance. TODO: We should still be able
// to run tests on the prototype object, if we obtain one through some
// other means.
return;
}
if (!this.untested)
{
// First test things to do with the exception/interface object and
// exception/interface prototype object.
this.test_self();
}
// Then test things to do with its members (constants, fields, attributes,
// operations, . . .). These are run even if .untested is true, because
// members might themselves be marked as .untested. This might happen to
// interfaces if the interface itself is untested but a partial interface
// that extends it is tested -- then the interface itself and its initial
// members will be marked as untested, but the members added by the partial
// interface are still tested.
this.test_members();
}
//@}
/// IdlException ///
function IdlException(obj) { IdlExceptionOrInterface.call(this, obj); }
IdlException.prototype = Object.create(IdlExceptionOrInterface.prototype);
IdlException.prototype.test_self = function()
//@{
{
test(function()
{
// "For every exception that is not declared with the
// [NoInterfaceObject] extended attribute, a corresponding property
// must exist on the exception’s relevant namespace object. The name of
// the property is the identifier of the exception, and its value is an
// object called the exception interface object, which provides access
// to any constants that have been associated with the exception. The
// property has the attributes { [[Writable]]: true, [[Enumerable]]:
// false, [[Configurable]]: true }."
assert_own_property(window, this.name,
"window does not have own property " + format_value(this.name));
var desc = Object.getOwnPropertyDescriptor(window, this.name);
assert_false("get" in desc, "window's property " + format_value(this.name) + " has getter");
assert_false("set" in desc, "window's property " + format_value(this.name) + " has setter");
assert_true(desc.writable, "window's property " + format_value(this.name) + " is not writable");
assert_false(desc.enumerable, "window's property " + format_value(this.name) + " is enumerable");
assert_true(desc.configurable, "window's property " + format_value(this.name) + " is not configurable");
// "The exception interface object for a given exception must be a
// function object."
// "If an object is defined to be a function object, then it has
// characteristics as follows:"
// "Its [[Prototype]] internal property is the Function prototype
// object."
// Note: This doesn't match browsers as of December 2011, see
// http://www.w3.org/Bugs/Public/show_bug.cgi?id=14813
assert_equals(Object.getPrototypeOf(window[this.name]), Function.prototype,
"prototype of window's property " + format_value(this.name) + " is not Function.prototype");
// "Its [[Get]] internal property is set as described in ECMA-262
// section 15.3.5.4."
// Not much to test for this.
// "Its [[Construct]] internal property is set as described in ECMA-262
// section 13.2.2."
// Tested below.
// "Its [[HasInstance]] internal property is set as described in
// ECMA-262 section 15.3.5.3, unless otherwise specified."
// TODO
// "Its [[Class]] internal property is “Function”."
// String() returns something implementation-dependent, because it
// calls Function#toString.
assert_class_string(window[this.name], "Function",
"class string of " + this.name);
// TODO: Test 4.9.1.1. Exception interface object [[Call]] method
// (which does not match browsers:
// http://www.w3.org/Bugs/Public/show_bug.cgi?id=14885)
}.bind(this), this.name + " exception: existence and properties of exception interface object");
test(function()
{
assert_own_property(window, this.name,
"window does not have own property " + format_value(this.name));
// "The exception interface object must also have a property named
// “prototype” with attributes { [[Writable]]: false, [[Enumerable]]:
// false, [[Configurable]]: false } whose value is an object called the
// exception interface prototype object. This object also provides
// access to the constants that are declared on the exception."
assert_own_property(window[this.name], "prototype",
'exception "' + this.name + '" does not have own property "prototype"');
var desc = Object.getOwnPropertyDescriptor(window[this.name], "prototype");
assert_false("get" in desc, this.name + ".prototype has getter");
assert_false("set" in desc, this.name + ".prototype has setter");
assert_false(desc.writable, this.name + ".prototype is writable");
assert_false(desc.enumerable, this.name + ".prototype is enumerable");
assert_false(desc.configurable, this.name + ".prototype is configurable");
// "The exception interface prototype object for a given exception must
// have an internal [[Prototype]] property whose value is as follows:
//
// "If the exception is declared to inherit from another exception,
// then the value of the internal [[Prototype]] property is the
// exception interface prototype object for the inherited exception.
// "Otherwise, the exception is not declared to inherit from another
// exception. The value of the internal [[Prototype]] property is the
// Error prototype object ([ECMA-262], section 15.11.3.1)."
//
// Note: This doesn't match browsers as of December 2011, see
// https://www.w3.org/Bugs/Public/show_bug.cgi?id=14887.
var inherit_exception = this.base ? this.base : "Error";
assert_own_property(window, inherit_exception,
'should inherit from ' + inherit_exception + ', but window has no such property');
assert_own_property(window[inherit_exception], "prototype",
'should inherit from ' + inherit_exception + ', but that object has no "prototype" property');
assert_equals(Object.getPrototypeOf(window[this.name].prototype),
window[inherit_exception].prototype,
'prototype of ' + this.name + '.prototype is not ' + inherit_exception + '.prototype');
// "The class string of an exception interface prototype object is the
// concatenation of the exception’s identifier and the string
// “Prototype”."
assert_class_string(window[this.name].prototype, this.name + "Prototype",
"class string of " + this.name + ".prototype");
// TODO: Test String(), based on ES definition of
// Error.prototype.toString?
}.bind(this), this.name + " exception: existence and properties of exception interface prototype object");
test(function()
{
assert_own_property(window, this.name,
"window does not have own property " + format_value(this.name));
assert_own_property(window[this.name], "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
// "There must be a property named “name” on the exception interface
// prototype object with attributes { [[Writable]]: true,
// [[Enumerable]]: false, [[Configurable]]: true } and whose value is
// the identifier of the exception."
assert_own_property(window[this.name].prototype, "name",
'prototype object does not have own property "name"');
var desc = Object.getOwnPropertyDescriptor(window[this.name].prototype, "name");
assert_false("get" in desc, this.name + ".prototype.name has getter");
assert_false("set" in desc, this.name + ".prototype.name has setter");
assert_true(desc.writable, this.name + ".prototype.name is not writable");
assert_false(desc.enumerable, this.name + ".prototype.name is enumerable");
assert_true(desc.configurable, this.name + ".prototype.name is not configurable");
assert_equals(desc.value, this.name, this.name + ".prototype.name has incorrect value");
}.bind(this), this.name + " exception: existence and properties of exception interface prototype object's \"name\" property");
test(function()
{
assert_own_property(window, this.name,
"window does not have own property " + format_value(this.name));
assert_own_property(window[this.name], "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
// "If the [NoInterfaceObject] extended attribute was not specified on
// the exception, then there must also be a property named
// “constructor” on the exception interface prototype object with
// attributes { [[Writable]]: true, [[Enumerable]]: false,
// [[Configurable]]: true } and whose value is a reference to the
// exception interface object for the exception."
assert_own_property(window[this.name].prototype, "constructor",
this.name + '.prototype does not have own property "constructor"');
var desc = Object.getOwnPropertyDescriptor(window[this.name].prototype, "constructor");
assert_false("get" in desc, this.name + ".prototype.constructor has getter");
assert_false("set" in desc, this.name + ".prototype.constructor has setter");
assert_true(desc.writable, this.name + ".prototype.constructor is not writable");
assert_false(desc.enumerable, this.name + ".prototype.constructor is enumerable");
assert_true(desc.configurable, this.name + ".prototype.constructor in not configurable");
assert_equals(window[this.name].prototype.constructor, window[this.name],
this.name + '.prototype.constructor is not the same object as ' + this.name);
}.bind(this), this.name + " exception: existence and properties of exception interface prototype object's \"constructor\" property");
}
//@}
IdlException.prototype.test_members = function()
//@{
{
for (var i = 0; i < this.members.length; i++)
{
var member = this.members[i];
if (member.untested)
{
continue;
}
if (member.type == "const" && member.name != "prototype")
{
test(function()
{
assert_own_property(window, this.name,
"window does not have own property " + format_value(this.name));
// "For each constant defined on the exception, there must be a
// corresponding property on the exception interface object, if
// it exists, if the identifier of the constant is not
// “prototype”."
assert_own_property(window[this.name], member.name);
// "The value of the property is the ECMAScript value that is
// equivalent to the constant’s IDL value, according to the
// rules in section 4.2 above."
assert_equals(window[this.name][member.name], eval(member.value),
"property has wrong value");
// "The property has attributes { [[Writable]]: false,
// [[Enumerable]]: true, [[Configurable]]: false }."
var desc = Object.getOwnPropertyDescriptor(window[this.name], member.name);
assert_false("get" in desc, "property has getter");
assert_false("set" in desc, "property has setter");
assert_false(desc.writable, "property is writable");
assert_true(desc.enumerable, "property is not enumerable");
assert_false(desc.configurable, "property is configurable");
}.bind(this), this.name + " exception: constant " + member.name + " on exception interface object");
// "In addition, a property with the same characteristics must
// exist on the exception interface prototype object."
test(function()
{
assert_own_property(window, this.name,
"window does not have own property " + format_value(this.name));
assert_own_property(window[this.name], "prototype",
'exception "' + this.name + '" does not have own property "prototype"');
assert_own_property(window[this.name].prototype, member.name);
assert_equals(window[this.name].prototype[member.name], eval(member.value),
"property has wrong value");
var desc = Object.getOwnPropertyDescriptor(window[this.name].prototype, member.name);
assert_false("get" in desc, "property has getter");
assert_false("set" in desc, "property has setter");
assert_false(desc.writable, "property is writable");
assert_true(desc.enumerable, "property is not enumerable");
assert_false(desc.configurable, "property is configurable");
}.bind(this), this.name + " exception: constant " + member.name + " on exception interface prototype object");
}
else if (member.type == "field")
{
test(function()
{
assert_own_property(window, this.name,
"window does not have own property " + format_value(this.name));
assert_own_property(window[this.name], "prototype",
'exception "' + this.name + '" does not have own property "prototype"');
// "For each exception field, there must be a corresponding
// property on the exception interface prototype object, whose
// characteristics are as follows:
// "The name of the property is the identifier of the exception
// field."
assert_own_property(window[this.name].prototype, member.name);
// "The property has attributes { [[Get]]: G, [[Enumerable]]:
// true, [[Configurable]]: true }, where G is the exception
// field getter, defined below."
var desc = Object.getOwnPropertyDescriptor(window[this.name].prototype, member.name);
assert_false("value" in desc, "property descriptor has value but is supposed to be accessor");
assert_false("writable" in desc, 'property descriptor has "writable" field but is supposed to be accessor');
// TODO: ES5 doesn't seem to say whether desc should have a
// .set property.
assert_true(desc.enumerable, "property is not enumerable");
assert_true(desc.configurable, "property is not configurable");
// "The exception field getter is a Function object whose
// behavior when invoked is as follows:"
assert_equals(typeof desc.get, "function", "typeof getter");
// "The value of the Function object’s “length” property is the
// Number value 0."
// This test is before the TypeError tests so that it's easiest
// to see that Firefox 11a1 only fails one assert in this test.
assert_equals(desc.get.length, 0, "getter length");
// "Let O be the result of calling ToObject on the this value.
// "If O is not a platform object representing an exception for
// the exception on which the exception field was declared,
// then throw a TypeError."
// TODO: Test on a platform object representing an exception.
assert_throws(new TypeError(), function()
{
window[this.name].prototype[member.name];
}.bind(this), "getting property on prototype object must throw TypeError");
assert_throws(new TypeError(), function()
{
desc.get.call({});
}.bind(this), "calling getter on wrong object type must throw TypeError");
}.bind(this), this.name + " exception: field " + member.name + " on exception interface prototype object");
}
}
}
//@}
IdlException.prototype.test_object = function(desc)
//@{
{
var obj, exception = null;
try
{
obj = eval(desc);
}
catch(e)
{
exception = e;
}
test(function()
{
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_equals(typeof obj, "object", "wrong typeof object");
// We can't easily test that its prototype is correct if there's no
// interface object, or the object is from a different global
// environment (not instanceof Object). TODO: test in this case that
// its prototype at least looks correct, even if we can't test that
// it's actually correct.
if (!this.has_extended_attribute("NoInterfaceObject")
&& (typeof obj != "object" || obj instanceof Object))
{
assert_own_property(window, this.name,
"window does not have own property " + format_value(this.name));
assert_own_property(window[this.name], "prototype",
'exception "' + this.name + '" does not have own property "prototype"');
// "The value of the internal [[Prototype]] property of the
// exception object must be the exception interface prototype
// object from the global environment the exception object is
// associated with."
assert_equals(Object.getPrototypeOf(obj),
window[this.name].prototype,
desc + "'s prototype is not " + this.name + ".prototype");
}
// "The class string of the exception object must be the identifier of
// the exception."
assert_class_string(obj, this.name, "class string of " + desc);
// Stringifier is not defined for DOMExceptions, because message isn't
// defined.
}.bind(this), this.name + " must be represented by " + desc);
for (var i = 0; i < this.members.length; i++)
{
var member = this.members[i];
test(function()
{
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_equals(typeof obj, "object", "wrong typeof object");
assert_inherits(obj, member.name);
if (member.type == "const")
{
assert_equals(obj[member.name], eval(member.value));
}
if (member.type == "field")
{
this.array.assert_type_is(obj[member.name], member.idlType);
}
}.bind(this), this.name + " exception: " + desc + ' must inherit property "' + member.name + '" with the proper type');
}
}
//@}
/// IdlInterface ///
function IdlInterface(obj) { IdlExceptionOrInterface.call(this, obj); }
IdlInterface.prototype = Object.create(IdlExceptionOrInterface.prototype);
IdlInterface.prototype.test_self = function()
//@{
{
test(function()
{
// "For every interface that is not declared with the
// [NoInterfaceObject] extended attribute, a corresponding property
// must exist on the interface’s relevant namespace object. The name of
// the property is the identifier of the interface, and its value is an
// object called the interface object. The property has the attributes
// { [[Writable]]: true, [[Enumerable]]: false, [[Configurable]]: true
// }."
// TODO: Should we test here that the property is actually writable
// etc., or trust getOwnPropertyDescriptor?
assert_own_property(window, this.name,
"window does not have own property " + format_value(this.name));
var desc = Object.getOwnPropertyDescriptor(window, this.name);
assert_false("get" in desc, "window's property " + format_value(this.name) + " has getter");
assert_false("set" in desc, "window's property " + format_value(this.name) + " has setter");
assert_true(desc.writable, "window's property " + format_value(this.name) + " is not writable");
assert_false(desc.enumerable, "window's property " + format_value(this.name) + " is enumerable");
assert_true(desc.configurable, "window's property " + format_value(this.name) + " is not configurable");
// "Interface objects are always function objects."
// "If an object is defined to be a function object, then it has
// characteristics as follows:"
// "Its [[Prototype]] internal property is the Function prototype
// object."
// Note: This doesn't match browsers as of December 2011, see
// http://www.w3.org/Bugs/Public/show_bug.cgi?id=14813
assert_equals(Object.getPrototypeOf(window[this.name]), Function.prototype,
"prototype of window's property " + format_value(this.name) + " is not Function.prototype");
// "Its [[Get]] internal property is set as described in ECMA-262
// section 15.3.5.4."
// Not much to test for this.
// "Its [[Construct]] internal property is set as described in ECMA-262
// section 13.2.2."
// Tested below if no constructor is defined. TODO: test constructors
// if defined.
// "Its [[HasInstance]] internal property is set as described in
// ECMA-262 section 15.3.5.3, unless otherwise specified."
// TODO
// "Its [[Class]] internal property is “Function”."
// String() returns something implementation-dependent, because it calls
// Function#toString.
assert_class_string(window[this.name], "Function", "class string of " + this.name);
if (!this.has_extended_attribute("Constructor"))
{
// "The internal [[Call]] method of the interface object behaves as
// follows . . .
//
// "If I was not declared with a [Constructor] extended attribute,
// then throw a TypeError."
assert_throws(new TypeError(), function()
{
window[this.name]();
}.bind(this), "interface object didn't throw TypeError when called as a function");
assert_throws(new TypeError(), function()
{
new window[this.name]();
}.bind(this), "interface object didn't throw TypeError when called as a constructor");
}
}.bind(this), this.name + " interface: existence and properties of interface object");
if (this.has_extended_attribute("Constructor"))
{
test(function()
{
assert_own_property(window, this.name,
"window does not have own property " + format_value(this.name));
// "Interface objects for interfaces declared with a [Constructor]
// extended attribute must have a property named “length” with
// attributes { [[Writable]]: false, [[Enumerable]]: false,
// [[Configurable]]: false } whose value is a Number determined as
// follows: . . .
// "Return the length of the shortest argument list of the entries
// in S."
// TODO: Variadic constructors. Should generalize this so that it
// works for testing operation length too (currently we just don't
// support multiple operations with the same identifier).
var expected_length = this.extAttrs
.filter(function(attr) { return attr.name == "Constructor" })
.map(function(attr) {
return attr.arguments ? attr.arguments.filter(
function(arg) {
return !arg.optional;
}).length : 0
})
.reduce(function(m, n) { return Math.min(m, n) });
assert_own_property(window[this.name], "length");
assert_equals(window[this.name].length, expected_length, "wrong value for " + this.name + ".length");
var desc = Object.getOwnPropertyDescriptor(window[this.name], "length");
assert_false("get" in desc, this.name + ".length has getter");
assert_false("set" in desc, this.name + ".length has setter");
assert_false(desc.writable, this.name + ".length is writable");
assert_false(desc.enumerable, this.name + ".length is enumerable");
assert_false(desc.configurable, this.name + ".length is configurable");
}.bind(this), this.name + " interface constructor");
}
// TODO: Test named constructors if I find any interfaces that have them.
test(function()
{
assert_own_property(window, this.name,
"window does not have own property " + format_value(this.name));
// "The interface object must also have a property named “prototype”
// with attributes { [[Writable]]: false, [[Enumerable]]: false,
// [[Configurable]]: false } whose value is an object called the
// interface prototype object. This object has properties that
// correspond to the attributes and operations defined on the
// interface, and is described in more detail in section 4.5.3 below."
assert_own_property(window[this.name], "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
var desc = Object.getOwnPropertyDescriptor(window[this.name], "prototype");
assert_false("get" in desc, this.name + ".prototype has getter");
assert_false("set" in desc, this.name + ".prototype has setter");
assert_false(desc.writable, this.name + ".prototype is writable");
assert_false(desc.enumerable, this.name + ".prototype is enumerable");
assert_false(desc.configurable, this.name + ".prototype is configurable");
// Next, test that the [[Prototype]] of the interface prototype object
// is correct. (This is made somewhat difficult by the existence of
// [NoInterfaceObject].)
// TODO: Aryeh thinks there's at least other place in this file where
// we try to figure out if an interface prototype object is
// correct. Consolidate that code.
// "The interface prototype object for a given interface A must have an
// internal [[Prototype]] property whose value is as follows:
// "If A is not declared to inherit from another interface, then the
// value of the internal [[Prototype]] property of A is the Array
// prototype object ([ECMA-262], section 15.4.4) if the interface was
// declared with ArrayClass, or the Object prototype object otherwise
// ([ECMA-262], section 15.2.4).
// "Otherwise, A does inherit from another interface. The value of the
// internal [[Prototype]] property of A is the interface prototype
// object for the inherited interface."
var inherit_interface, inherit_interface_has_interface_object;
if (this.base) {
inherit_interface = this.base;
inherit_interface_has_interface_object =
!this.array
.members[inherit_interface]
.has_extended_attribute("NoInterfaceObject");
} else if (this.has_extended_attribute('ArrayClass')) {
inherit_interface = 'Array';
inherit_interface_has_interface_object = true;
} else {
inherit_interface = 'Object';
inherit_interface_has_interface_object = true;
}
if (inherit_interface_has_interface_object) {
assert_own_property(window, inherit_interface,
'should inherit from ' + inherit_interface + ', but window has no such property');
assert_own_property(window[inherit_interface], 'prototype',
'should inherit from ' + inherit_interface + ', but that object has no "prototype" property');
assert_equals(Object.getPrototypeOf(window[this.name].prototype),
window[inherit_interface].prototype,
'prototype of ' + this.name + '.prototype is not ' + inherit_interface + '.prototype');
} else {
// We can't test that we get the correct object, because this is the
// only way to get our hands on it. We only test that its class
// string, at least, is correct.
assert_class_string(Object.getPrototypeOf(window[this.name].prototype),
inherit_interface + 'Prototype',
'Class name for prototype of ' + this.name +
'.prototype is not "' + inherit_interface + 'Prototype"');
}
// "The class string of an interface prototype object is the
// concatenation of the interface’s identifier and the string
// “Prototype”."
assert_class_string(window[this.name].prototype, this.name + "Prototype",
"class string of " + this.name + ".prototype");
// String() should end up calling {}.toString if nothing defines a
// stringifier.
if (!this.has_stringifier()) {
assert_equals(String(window[this.name].prototype), "[object " + this.name + "Prototype]",
"String(" + this.name + ".prototype)");
}
}.bind(this), this.name + " interface: existence and properties of interface prototype object");
test(function()
{
assert_own_property(window, this.name,
"window does not have own property " + format_value(this.name));
assert_own_property(window[this.name], "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
// "If the [NoInterfaceObject] extended attribute was not specified on
// the interface, then the interface prototype object must also have a
// property named “constructor” with attributes { [[Writable]]: true,
// [[Enumerable]]: false, [[Configurable]]: true } whose value is a
// reference to the interface object for the interface."
assert_own_property(window[this.name].prototype, "constructor",
this.name + '.prototype does not have own property "constructor"');
var desc = Object.getOwnPropertyDescriptor(window[this.name].prototype, "constructor");
assert_false("get" in desc, this.name + ".prototype.constructor has getter");
assert_false("set" in desc, this.name + ".prototype.constructor has setter");
assert_true(desc.writable, this.name + ".prototype.constructor is not writable");
assert_false(desc.enumerable, this.name + ".prototype.constructor is enumerable");
assert_true(desc.configurable, this.name + ".prototype.constructor in not configurable");
assert_equals(window[this.name].prototype.constructor, window[this.name],
this.name + '.prototype.constructor is not the same object as ' + this.name);
}.bind(this), this.name + ' interface: existence and properties of interface prototype object\'s "constructor" property');
}
//@}
IdlInterface.prototype.test_members = function()
//@{
{
for (var i = 0; i < this.members.length; i++)
{
var member = this.members[i];
if (member.untested)
{
continue;
}
if (member.type == "const")
{
test(function()
{
assert_own_property(window, this.name,
"window does not have own property " + format_value(this.name));
// "For each constant defined on an interface A, there must be
// a corresponding property on the interface object, if it
// exists."
assert_own_property(window[this.name], member.name);
// "The value of the property is that which is obtained by
// converting the constant’s IDL value to an ECMAScript
// value."
assert_equals(window[this.name][member.name], eval(member.value),
"property has wrong value");
// "The property has attributes { [[Writable]]: false,
// [[Enumerable]]: true, [[Configurable]]: false }."
var desc = Object.getOwnPropertyDescriptor(window[this.name], member.name);
assert_false("get" in desc, "property has getter");
assert_false("set" in desc, "property has setter");
assert_false(desc.writable, "property is writable");
assert_true(desc.enumerable, "property is not enumerable");
assert_false(desc.configurable, "property is configurable");
}.bind(this), this.name + " interface: constant " + member.name + " on interface object");
// "In addition, a property with the same characteristics must
// exist on the interface prototype object."
test(function()
{
assert_own_property(window, this.name,
"window does not have own property " + format_value(this.name));
assert_own_property(window[this.name], "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
assert_own_property(window[this.name].prototype, member.name);
assert_equals(window[this.name].prototype[member.name], eval(member.value),
"property has wrong value");
var desc = Object.getOwnPropertyDescriptor(window[this.name], member.name);
assert_false("get" in desc, "property has getter");
assert_false("set" in desc, "property has setter");
assert_false(desc.writable, "property is writable");
assert_true(desc.enumerable, "property is not enumerable");
assert_false(desc.configurable, "property is configurable");
}.bind(this), this.name + " interface: constant " + member.name + " on interface prototype object");
}
else if (member.type == "attribute")
{
if (member.has_extended_attribute("Unforgeable"))
{
// We do the checks in test_interface_of instead
continue;
}
test(function()
{
assert_own_property(window, this.name,
"window does not have own property " + format_value(this.name));
assert_own_property(window[this.name], "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
// TODO: Needs to test for LenientThis.
assert_throws(new TypeError(), function() {
window[this.name].prototype[member.name];
}.bind(this), "getting property on prototype object must throw TypeError");
do_interface_attribute_asserts(window[this.name].prototype, member);
}.bind(this), this.name + " interface: attribute " + member.name);
}
else if (member.type == "operation")
{
// TODO: Need to correctly handle multiple operations with the same
// identifier.
if (!member.name)
{
// Unnamed getter or such
continue;
}
test(function()
{
assert_own_property(window, this.name,
"window does not have own property " + format_value(this.name));
assert_own_property(window[this.name], "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
// "For each unique identifier of an operation defined on the
// interface, there must be a corresponding property on the
// interface prototype object (if it is a regular operation) or
// the interface object (if it is a static operation), unless
// the effective overload set for that identifier and operation
// and with an argument count of 0 (for the ECMAScript language
// binding) has no entries."
//
// TODO: The library doesn't seem to support static operations.
assert_own_property(window[this.name].prototype, member.name,
"interface prototype object missing non-static operation");
var desc = Object.getOwnPropertyDescriptor(window[this.name].prototype, member.name);
// "The property has attributes { [[Writable]]: true,
// [[Enumerable]]: true, [[Configurable]]: true }."
assert_false("get" in desc, "property has getter");
assert_false("set" in desc, "property has setter");
assert_true(desc.writable, "property is not writable");
assert_true(desc.enumerable, "property is not enumerable");
assert_true(desc.configurable, "property is not configurable");
// "The value of the property is a Function object whose
// behavior is as follows . . ."
assert_equals(typeof window[this.name].prototype[member.name], "function",
"property must be a function");
// "The value of the Function object’s “length” property is
// a Number determined as follows:
// ". . .
// "Return the length of the shortest argument list of the
// entries in S."
//
// TODO: Doesn't handle overloading or variadic arguments.
assert_equals(window[this.name].prototype[member.name].length,
member.arguments.filter(function(arg) {
return !arg.optional;
}).length,
"property has wrong .length");
// Make some suitable arguments
var args = member.arguments.map(function(arg) {
return create_suitable_object(arg.type);
});
// "Let O be a value determined as follows:
// ". . .
// "Otherwise, throw a TypeError."
// This should be hit if the operation is not static, there is
// no [ImplicitThis] attribute, and the this value is null.
//
// TODO: We currently ignore the static and [ImplicitThis]
// cases.
assert_throws(new TypeError(), function() {
window[this.name].prototype[member.name].apply(null, args);
}, "calling operation with this = null didn't throw TypeError");
// ". . . If O is not null and is also not a platform object
// that implements interface I, throw a TypeError."
//
// TODO: Test a platform object that implements some other
// interface. (Have to be sure to get inheritance right.)
assert_throws(new TypeError(), function() {
window[this.name].prototype[member.name].apply({}, args);
}, "calling operation with this = {} didn't throw TypeError");
}.bind(this), this.name + " interface: operation " + member.name +
"(" + member.arguments.map(function(m) { return m.type.idlType; }) +
")");
}
// TODO: check more member types, like stringifier
}
}
//@}
IdlInterface.prototype.test_object = function(desc)
//@{
{
var obj, exception = null;
try
{
obj = eval(desc);
}
catch(e)
{
exception = e;
}
// TODO: WebIDLParser doesn't currently support named legacycallers, so I'm
// not sure what those would look like in the AST
var expected_typeof = this.members.some(function(member)
{
return member.legacycaller
|| ("idlType" in member && member.idlType.legacycaller)
|| ("idlType" in member && typeof member.idlType == "object"
&& "idlType" in member.idlType && member.idlType.idlType == "legacycaller");
}) ? "function" : "object";
this.test_primary_interface_of(desc, obj, exception, expected_typeof);
var current_interface = this;
while (current_interface)
{
if (!(current_interface.name in this.array.members))
{
throw "Interface " + current_interface.name + " not found (inherited by " + this.name + ")";
}
if (current_interface.prevent_multiple_testing && current_interface.already_tested)
{
return;
}
current_interface.test_interface_of(desc, obj, exception, expected_typeof);
current_interface = this.array.members[current_interface.base];
}
}
//@}
IdlInterface.prototype.test_primary_interface_of = function(desc, obj, exception, expected_typeof)
//@{
{
// We can't easily test that its prototype is correct if there's no
// interface object, or the object is from a different global environment
// (not instanceof Object). TODO: test in this case that its prototype at
// least looks correct, even if we can't test that it's actually correct.
if (!this.has_extended_attribute("NoInterfaceObject")
&& (typeof obj != expected_typeof || obj instanceof Object))
{
test(function()
{
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_equals(typeof obj, expected_typeof, "wrong typeof object");
assert_own_property(window, this.name,
"window does not have own property " + format_value(this.name));
assert_own_property(window[this.name], "prototype",
'interface "' + this.name + '" does not have own property "prototype"');
// "The value of the internal [[Prototype]] property of the
// platform object is the interface prototype object of the primary
// interface from the platform object’s associated global
// environment."
assert_equals(Object.getPrototypeOf(obj),
window[this.name].prototype,
desc + "'s prototype is not " + this.name + ".prototype");
}.bind(this), this.name + " must be primary interface of " + desc);
}
// "The class string of a platform object that implements one or more
// interfaces must be the identifier of the primary interface of the
// platform object."
test(function()
{
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_equals(typeof obj, expected_typeof, "wrong typeof object");
assert_class_string(obj, this.name, "class string of " + desc);
if (!this.has_stringifier())
{
assert_equals(String(obj), "[object " + this.name + "]", "String(" + desc + ")");
}
}.bind(this), "Stringification of " + desc);
}
//@}
IdlInterface.prototype.test_interface_of = function(desc, obj, exception, expected_typeof)
//@{
{
// TODO: Indexed and named properties, more checks on interface members
this.already_tested = true;
for (var i = 0; i < this.members.length; i++)
{
var member = this.members[i];
if (member.has_extended_attribute("Unforgeable"))
{
test(function()
{
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_equals(typeof obj, expected_typeof, "wrong typeof object");
do_interface_attribute_asserts(obj, member);
}.bind(this), this.name + " interface: " + desc + ' must have own property "' + member.name + '"');
}
else if ((member.type == "const"
|| member.type == "attribute"
|| member.type == "operation")
&& member.name)
{
test(function()
{
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_equals(typeof obj, expected_typeof, "wrong typeof object");
assert_inherits(obj, member.name);
if (member.type == "const")
{
assert_equals(obj[member.name], eval(member.value));
}
if (member.type == "attribute")
{
// Attributes are accessor properties, so they might
// legitimately throw an exception rather than returning
// anything.
var property, thrown = false;
try
{
property = obj[member.name];
}
catch (e)
{
thrown = true;
}
if (!thrown)
{
this.array.assert_type_is(property, member.idlType);
}
}
if (member.type == "operation")
{
assert_equals(typeof obj[member.name], "function");
}
}.bind(this), this.name + " interface: " + desc + ' must inherit property "' + member.name + '" with the proper type (' + i + ')');
}
// TODO: This is wrong if there are multiple operations with the same
// identifier.
// TODO: Test passing arguments of the wrong type.
if (member.type == "operation" && member.name && member.arguments.length)
{
test(function()
{
assert_equals(exception, null, "Unexpected exception when evaluating object");
assert_equals(typeof obj, expected_typeof, "wrong typeof object");
assert_inherits(obj, member.name);
var args = [];
for (var i = 0; i < member.arguments.length; i++)
{
if (member.arguments[i].optional)
{
break;
}
assert_throws(new TypeError(), function()
{
obj[member.name].apply(obj, args);
}.bind(this), "Called with " + i + " arguments");
args.push(create_suitable_object(member.arguments[i].type));
}
}.bind(this), this.name + " interface: calling " + member.name +
"(" + member.arguments.map(function(m) { return m.type.idlType; }) +
") on " + desc + " with too few arguments must throw TypeError");
}
}
}
//@}
IdlInterface.prototype.has_stringifier = function()
//@{
{
if (this.members.some(function(member) { return member.stringifier })) {
return true;
}
if (this.base &&
this.array.members[this.base].has_stringifier()) {
return true;
}
return false;
}
//@}
function do_interface_attribute_asserts(obj, member)
//@{
{
// "For each attribute defined on the interface, there must exist a
// corresponding property. If the attribute was declared with the
// [Unforgeable] extended attribute, then the property exists on every
// object that implements the interface. Otherwise, it exists on the
// interface’s interface prototype object."
//
// This is called by test_self() with the prototype as obj, and by
// test_interface_of() with the object as obj.
assert_own_property(obj, member.name);
// "The property has attributes { [[Get]]: G, [[Set]]: S, [[Enumerable]]:
// true, [[Configurable]]: configurable }, where:
// "configurable is false if the attribute was declared with the
// [Unforgeable] extended attribute and true otherwise;
// "G is the attribute getter, defined below; and
// "S is the attribute setter, also defined below."
var desc = Object.getOwnPropertyDescriptor(obj, member.name);
assert_false("value" in desc, 'property descriptor has value but is supposed to be accessor');
assert_false("writable" in desc, 'property descriptor has "writable" field but is supposed to be accessor');
assert_true(desc.enumerable, "property is not enumerable");
if (member.has_extended_attribute("Unforgeable"))
{
assert_false(desc.configurable, "[Unforgeable] property must not be configurable");
}
else
{
assert_true(desc.configurable, "property must be configurable");
}
// "The attribute getter is a Function object whose behavior when invoked
// is as follows:
// "...
// "The value of the Function object’s “length” property is the Number
// value 0."
assert_equals(typeof desc.get, "function", "getter must be Function");
assert_equals(desc.get.length, 0, "getter length must be 0");
// TODO: Account for LenientThis
assert_throws(new TypeError(), function()
{
desc.get.call({});
}.bind(this), "calling getter on wrong object type must throw TypeError");
// TODO: Test calling setter on the interface prototype (should throw
// TypeError in most cases).
//
// "The attribute setter is undefined if the attribute is declared readonly
// and has neither a [PutForwards] nor a [Replaceable] extended attribute
// declared on it. Otherwise, it is a Function object whose behavior when
// invoked is as follows:
// "...
// "The value of the Function object’s “length” property is the Number
// value 1."
if (member.readonly
&& !member.has_extended_attribute("PutForwards")
&& !member.has_extended_attribute("Replaceable"))
{
assert_equals(desc.set, undefined, "setter must be undefined for readonly attributes");
}
else
{
assert_equals(typeof desc.set, "function", "setter must be function for PutForwards, Replaceable, or non-readonly attributes");
assert_equals(desc.set.length, 1, "setter length must be 1");
}
}
//@}
/// IdlInterfaceMember ///
function IdlInterfaceMember(obj)
//@{
{
/**
* obj is an object produced by the WebIDLParser.js "ifMember" production.
* We just forward all properties to this object without modification,
* except for special extAttrs handling.
*/
for (var k in obj)
{
this[k] = obj[k];
}
if (!("extAttrs" in this))
{
this.extAttrs = [];
}
}
//@}
IdlInterfaceMember.prototype = Object.create(IdlObject.prototype);
/// Internal helper functions ///
function create_suitable_object(type)
//@{
{
/**
* type is an object produced by the WebIDLParser.js "type" production. We
* return a JavaScript value that matches the type, if we can figure out
* how.
*/
if (type.nullable)
{
return null;
}
switch (type.idlType)
{
case "any":
case "boolean":
return true;
case "byte": case "octet": case "short": case "unsigned short":
case "long": case "unsigned long": case "long long":
case "unsigned long long": case "float": case "double":
return 7;
case "DOMString":
return "foo";
case "object":
return {a: "b"};
case "Node":
return document.createTextNode("abc");
}
return null;
}
//@}
})();
// vim: set expandtab shiftwidth=4 tabstop=4 foldmarker=@{,@} foldmethod=marker: