text: // Copyright 2010 The Closure Library Authors. All Rights Reserved.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //      http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS-IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  goog.provide('goog.testing.recordFunctionTest');
  goog.setTestOnly('goog.testing.recordFunctionTest');
  
  goog.require('goog.functions');
  goog.require('goog.testing.PropertyReplacer');
  goog.require('goog.testing.TestCase');
  goog.require('goog.testing.jsunit');
  goog.require('goog.testing.recordConstructor');
  goog.require('goog.testing.recordFunction');
  
  var stubs = new goog.testing.PropertyReplacer();
  
  function setUp() {
    // TODO(b/25875505): Fix unreported assertions (go/failonunreportedasserts).
    goog.testing.TestCase.getActiveTestCase().failOnUnreportedAsserts = false;
  }
  
  function tearDown() {
    stubs.reset();
  }
  
  function testNoCalls() {
    var f = goog.testing.recordFunction(goog.functions.identity);
    assertEquals('call count', 0, f.getCallCount());
    assertNull('last call', f.getLastCall());
    assertArrayEquals('all calls', [], f.getCalls());
  }
  
  function testWithoutArguments() {
    var f = goog.testing.recordFunction();
    assertUndefined('f(1)', f(1));
    assertEquals('call count', 1, f.getCallCount());
    var lastCall = f.getLastCall();
    assertEquals('original function', goog.nullFunction, lastCall.getFunction());
    assertEquals('this context', window, lastCall.getThis());
    assertArrayEquals('arguments', [1], lastCall.getArguments());
    assertEquals('arguments[0]', 1, lastCall.getArgument(0));
    assertUndefined('arguments[1]', lastCall.getArgument(1));
    assertUndefined('return value', lastCall.getReturnValue());
  }
  
  function testWithIdentityFunction() {
    var f = goog.testing.recordFunction(goog.functions.identity);
    var dummyThis = {};
    assertEquals('f(1)', 1, f(1));
    assertEquals('f.call(dummyThis, 2)', 2, f.call(dummyThis, 2));
  
    var calls = f.getCalls();
    var firstCall = calls[0];
    var lastCall = f.getLastCall();
    assertEquals('call count', 2, f.getCallCount());
    assertEquals('last call', calls[1], lastCall);
    assertEquals(
        'original function', goog.functions.identity, lastCall.getFunction());
    assertEquals('this context of first call', window, firstCall.getThis());
    assertEquals('this context of last call', dummyThis, lastCall.getThis());
    assertArrayEquals(
        'arguments of the first call', [1], firstCall.getArguments());
    assertArrayEquals('arguments of the last call', [2], lastCall.getArguments());
    assertEquals('return value of the first call', 1, firstCall.getReturnValue());
    assertEquals('return value of the last call', 2, lastCall.getReturnValue());
    assertNull('error thrown by the first call', firstCall.getError());
    assertNull('error thrown by the last call', lastCall.getError());
  }
  
  function testWithErrorFunction() {
    var f = goog.testing.recordFunction(goog.functions.error('error'));
  
    var error = assertThrows('f(1) should throw an error', function() { f(1); });
    assertEquals('error message', 'error', error.message);
    assertEquals('call count', 1, f.getCallCount());
    var lastCall = f.getLastCall();
    assertEquals('this context', window, lastCall.getThis());
    assertArrayEquals('arguments', [1], lastCall.getArguments());
    assertUndefined('return value', lastCall.getReturnValue());
    assertEquals('recorded error message', 'error', lastCall.getError().message);
  }
  
  function testWithClass() {
    var ns = {};
    /** @constructor */
    ns.TestClass = function(num) { this.setX(ns.TestClass.identity(1) + num); };
    ns.TestClass.prototype.setX = function(x) { this.x = x; };
    ns.TestClass.identity = function(x) { return x; };
    var originalNsTestClass = ns.TestClass;
  
    stubs.set(ns, 'TestClass', goog.testing.recordConstructor(ns.TestClass));
    stubs.set(
        ns.TestClass.prototype, 'setX',
        goog.testing.recordFunction(ns.TestClass.prototype.setX));
    stubs.set(
        ns.TestClass, 'identity',
        goog.testing.recordFunction(ns.TestClass.identity));
  
    var obj = new ns.TestClass(2);
    assertEquals('constructor is called once', 1, ns.TestClass.getCallCount());
    var lastConstructorCall = ns.TestClass.getLastCall();
    assertArrayEquals(
        '... with argument 2', [2], lastConstructorCall.getArguments());
    assertEquals('the created object', obj, lastConstructorCall.getThis());
    assertEquals(
        'type of the created object', originalNsTestClass, obj.constructor);
  
    assertEquals('setX is called once', 1, obj.setX.getCallCount());
    assertArrayEquals(
        '... with argument 3', [3], obj.setX.getLastCall().getArguments());
    assertEquals('The x field is properly set', 3, obj.x);
  
    assertEquals(
        'identity is called once', 1, ns.TestClass.identity.getCallCount());
    assertArrayEquals(
        '... with argument 1', [1],
        ns.TestClass.identity.getLastCall().getArguments());
  }
  
  function testPopLastCall() {
    var f = goog.testing.recordFunction();
    f(0);
    f(1);
  
    var firstCall = f.getCalls()[0];
    var lastCall = f.getCalls()[1];
    assertEquals('return value of popLastCall', lastCall, f.popLastCall());
    assertArrayEquals('1 call remains', [firstCall], f.getCalls());
    assertEquals('next return value of popLastCall', firstCall, f.popLastCall());
    assertArrayEquals('0 calls remain', [], f.getCalls());
    assertNull('no more calls to pop', f.popLastCall());
  }
  
  function testReset() {
    var f = goog.testing.recordFunction();
    f(0);
    f(1);
  
    assertEquals('Should be two calls.', 2, f.getCallCount());
  
    f.reset();
  
    assertEquals('Call count should reset.', 0, f.getCallCount());
  }
  
  function testAssertCallCount() {
    var f = goog.testing.recordFunction(goog.functions.identity);
  
    f.assertCallCount(0);
    f.assertCallCount('Unexpected failure.', 0);
  
    f('Poodles');
    f.assertCallCount(1);
    f.assertCallCount('Unexpected failure.', 1);
  
    f('Hopscotch');
    f.assertCallCount(2);
  
    f.reset();
    f.assertCallCount(0);
  
    f('Bedazzler');
    f.assertCallCount(1);
  
    var error = assertThrows(function() { f.assertCallCount(11); });
    assertEquals(error.comment, 'Expected 11 call(s), but was 1.');
  
    var comment = 'This application has requested the Runtime to terminate it ' +
        'in an unusual way.';
    var error2 = assertThrows(function() { f.assertCallCount(comment, 12); });
    assertEquals(error2.comment, 'Expected 12 call(s), but was 1. ' + comment);
  }
  
  async function testWaitForCalls() {
    const f = goog.testing.recordFunction(goog.functions.identity);
  
    setTimeout(() => {
      f('Poodles');
    }, 0);
    f.assertCallCount(0);
    await f.waitForCalls(1);
    f.assertCallCount(1);
  
    setTimeout(() => {
      f('Hopscotch');
      setTimeout(() => {
        f('Bedazzler');
      }, 0);
    }, 0);
    await f.waitForCalls(3);
    f.assertCallCount(3);
    await f.waitForCalls(1);
    f.assertCallCount(3);
    f.reset();
    let resolved = false;
    const finished = new Promise((resolve) => {
      setTimeout(() => {
        assertFalse(resolved);
        resolve();
        f('Poodles');
      }, 0);
    });
    await f.waitForCalls(1);
    resolved = true;
    await finished;
    f.assertCallCount(1);
  }
  
  async function testWaitCalls_Reset() {
    const f = goog.testing.recordFunction(goog.functions.identity);
  
    f.waitForCalls(1).then(() => {
      fail('resolved a waitForCalls promise that was reset.');
    });
  
    f.reset();
    f('Poodles');
    await new Promise((resolve) => {
      setTimeout(resolve, 0);
    });
  }
  