JSTests/typeProfiler/return.js

var returnTypeFor = $vm.returnTypeFor;

load("./driver/driver.js");

function foo(x) { return x; }
function Ctor() { 
    if (!(this instanceof Ctor))
        return "Not called with `new`"; 
}

// ====== End test cases ======

foo(20);
var types = returnTypeFor(foo);
assert(types.globalTypeSet.displayTypeName === T.Integer, "Function 'foo' should return 'Integer'");

foo(20.5);
types = returnTypeFor(foo);
assert(types.globalTypeSet.displayTypeName === T.Number, "Function 'foo' should return 'Number' after being called twice");

foo("hello");
types = returnTypeFor(foo);
assert(types.globalTypeSet.displayTypeName === T.Many, "Function 'foo' should return '(many)' after being called three times");
assert(types.globalTypeSet.primitiveTypeNames.indexOf(T.String) !== -1, "Function 'foo' should have returned 'String' at some point");
assert(types.globalTypeSet.primitiveTypeNames.indexOf(T.Integer) !== -1, "Function 'foo' should have returned 'Integer' at some point");
assert(types.globalTypeSet.primitiveTypeNames.indexOf(T.Number) !== -1, "Function 'foo' should have returned 'Number' at some point");

new Ctor;
types = returnTypeFor(Ctor);
assert(types.globalTypeSet.displayTypeName === "Ctor", "Function 'Ctor' should return 'Ctor'");
assert(types.globalTypeSet.structures.length === 1, "Function 'Ctor' should have seen one structure");

Ctor();
types = returnTypeFor(Ctor);
assert(types.globalTypeSet.displayTypeName === "Object", "Function 'Ctor' should return Object");
assert(types.globalTypeSet.primitiveTypeNames.indexOf(T.String) !== -1, "Function 'Ctor' should return String");