Source/JavaScriptCore/API/tests/FunctionOverridesTest.cpp

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#include "config.h"
#include "FunctionOverridesTest.h"

#include "FunctionOverrides.h"
#include "InitializeThreading.h"
#include "JSContextRefPrivate.h"
#include "JavaScript.h"
#include "Options.h"
#include <string>

using JSC::Options;

int testFunctionOverrides()
{
    bool failed = false;

    JSC::initializeThreading();
    Options::initialize(); // Ensure options is initialized first.

    const char* oldFunctionOverrides = Options::functionOverrides();
    
    Options::functionOverrides() = "testapi-function-overrides.js";
    JSC::FunctionOverrides::reinstallOverrides();

    JSGlobalContextRef context = JSGlobalContextCreateInGroup(nullptr, nullptr);

    JSObjectRef globalObject = JSContextGetGlobalObject(context);
    ASSERT_UNUSED(globalObject, JSValueIsObject(context, globalObject));

    const char* scriptString =
        "var str = '';" "\n"
        "function f1() { /* Original f1 */ }" "\n"
        "str += f1 + '\\n';" "\n"
        "var f2 = function() {" "\n"
        "    // Original f2" "\n"
        "}" "\n"
        "str += f2 + '\\n';" "\n"
        "str += (function() { /* Original f3 */ }) + '\\n';" "\n"
        "var f4Source = '/* Original f4 */'" "\n"
        "var f4 =  new Function(f4Source);" "\n"
        "str += f4 + '\\n';" "\n"
        "\n"
        "var expectedStr =" "\n"
        "'function f1() { /* Overridden f1 */ }\\n"
        "function () { /* Overridden f2 */ }\\n"
        "function () { /* Overridden f3 */ }\\n"
        "function anonymous() { /* Overridden f4 */ }\\n';"
        "var result = (str == expectedStr);" "\n"
        "result";

    JSStringRef script = JSStringCreateWithUTF8CString(scriptString);
    JSValueRef exception = nullptr;
    JSValueRef resultRef = JSEvaluateScript(context, script, nullptr, nullptr, 1, &exception);

    if (!JSValueIsBoolean(context, resultRef) || !JSValueToBoolean(context, resultRef))
        failed = true;

    JSGlobalContextRelease(context);
    
    JSC::Options::functionOverrides() = oldFunctionOverrides;
    JSC::FunctionOverrides::reinstallOverrides();

    printf("%s: function override tests.\n", failed ? "FAIL" : "PASS");

    return failed;
}