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path: root/js/src/jsapi-tests/testCallArgs.cpp
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/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "jsapi-tests/tests.h"

static bool
CustomNative(JSContext* cx, unsigned argc, JS::Value* vp)
{
    JS::CallArgs args = JS::CallArgsFromVp(argc, vp);

    MOZ_RELEASE_ASSERT(!JS_IsExceptionPending(cx));

    MOZ_RELEASE_ASSERT(!args.isConstructing());
    args.rval().setUndefined();
    MOZ_RELEASE_ASSERT(!args.isConstructing());

    return true;
}

static bool
TryConstruct(JSContext* cx, const char* code, const char* filename, decltype(__LINE__) lineno,
             JS::MutableHandleValue vp)
{
    JS::CompileOptions opts(cx);
    opts.setFileAndLine(filename, lineno);
    return JS::Evaluate(cx, opts, code, strlen(code), vp);
}

BEGIN_TEST(testCallArgs_isConstructing_native)
{
    CHECK(JS_DefineFunction(cx, global, "customNative", CustomNative, 0, 0));

    JS::RootedValue result(cx);

    CHECK(!TryConstruct(cx, "new customNative();", __FILE__, __LINE__, &result));
    CHECK(JS_IsExceptionPending(cx));
    JS_ClearPendingException(cx);

    EVAL("customNative();", &result);
    CHECK(result.isUndefined());

    return true;
}
END_TEST(testCallArgs_isConstructing_native)

static bool
CustomConstructor(JSContext* cx, unsigned argc, JS::Value* vp)
{
    JS::CallArgs args = JS::CallArgsFromVp(argc, vp);

    MOZ_RELEASE_ASSERT(!JS_IsExceptionPending(cx));

    if (args.isConstructing()) {
        JSObject* obj = JS_NewPlainObject(cx);
        if (!obj)
            return false;

        args.rval().setObject(*obj);

        MOZ_RELEASE_ASSERT(args.isConstructing());
    } else {
        args.rval().setUndefined();

        MOZ_RELEASE_ASSERT(!args.isConstructing());
    }

    return true;
}

BEGIN_TEST(testCallArgs_isConstructing_constructor)
{
    CHECK(JS_DefineFunction(cx, global, "customConstructor", CustomConstructor, 0,
                            JSFUN_CONSTRUCTOR));

    JS::RootedValue result(cx);

    EVAL("new customConstructor();", &result);
    CHECK(result.isObject());

    EVAL("customConstructor();", &result);
    CHECK(result.isUndefined());

    return true;
}
END_TEST(testCallArgs_isConstructing_constructor)