// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// V8 assertion compatibility shim for Ladybird's test-js harness

function assertEquals(expected, actual, msg) {
    if (Array.isArray(expected) && Array.isArray(actual)) {
        expect(actual).toEqual(expected);
    } else if (expected instanceof RegExp && actual instanceof RegExp) {
        expect(actual.source).toBe(expected.source);
        expect(actual.flags).toBe(expected.flags);
    } else if (expected !== null && typeof expected === "object" && actual !== null && typeof actual === "object") {
        expect(actual).toEqual(expected);
    } else {
        expect(actual).toBe(expected);
    }
}

function assertTrue(val, msg) {
    expect(val).toBeTrue();
}

function assertFalse(val, msg) {
    expect(val).toBeFalse();
}

function assertNull(val, msg) {
    expect(val).toBeNull();
}

function assertNotNull(val, msg) {
    expect(val).not.toBeNull();
}

function assertThrows(fn, type_opt, msg_opt) {
    if (typeof fn === "string") {
        expect(() => eval(fn)).toThrow();
    } else {
        expect(fn).toThrow();
    }
}

function assertDoesNotThrow(fn, msg) {
    if (typeof fn === "string") {
        eval(fn);
    } else {
        fn();
    }
}

function assertInstanceof(val, type, msg) {
    expect(val instanceof type).toBeTrue();
}

function assertUnreachable(msg) {
    expect().fail("unreachable" + (msg ? ": " + msg : ""));
}

function assertEarlyError(code) {
    assertThrows(() => new Function(code));
}

function assertThrowsAtRuntime(code, type_opt) {
    const f = new Function(code);
    assertThrows(f, type_opt);
}

function assertArrayEquals(expected, actual) {
    expect(actual).toEqual(expected);
}

test("es6/array-concat-spreadable-regexp", () => {
    "use strict";
    var re = /abc/;
    // RegExps are not concat-spreadable by default
    assertEquals([re], [].concat(re));

    // RegExps may be individually concat-spreadable
    re[Symbol.isConcatSpreadable] = true;
    ((re[0] = 1), (re[1] = 2), (re[2] = 3), (re.length = 3));
    assertEquals([1, 2, 3], [].concat(re));

    // RegExps may be concat-spreadable
    RegExp.prototype[Symbol.isConcatSpreadable] = true;
    RegExp.prototype.length = 3;

    assertEquals(new Array(3), [].concat(/abc/));
    RegExp.prototype[0] = 1;
    RegExp.prototype[1] = 2;
    RegExp.prototype[2] = 3;
    assertEquals([1, 2, 3], [].concat(/abc/));
});
