| // Copyright 2020 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. |
| |
| /** |
| * @fileoverview Tests for mutating funciton calls. |
| */ |
| |
| 'use strict'; |
| |
| const sinon = require('sinon'); |
| |
| const helpers = require('./helpers.js'); |
| const random = require('../random.js'); |
| const scriptMutator = require('../script_mutator.js'); |
| const sourceHelpers = require('../source_helpers.js'); |
| const functionCallMutator = require('../mutators/function_call_mutator.js'); |
| |
| const sandbox = sinon.createSandbox(); |
| |
| function loadAndMutate(input_file) { |
| const source = helpers.loadTestData(input_file); |
| |
| const settings = scriptMutator.defaultSettings(); |
| settings['engine'] = 'V8'; |
| settings['MUTATE_FUNCTION_CALLS'] = 1.0; |
| |
| const mutator = new functionCallMutator.FunctionCallMutator(settings); |
| mutator.mutate(source); |
| return source; |
| } |
| |
| describe('Mutate functions', () => { |
| afterEach(() => { |
| sandbox.restore(); |
| }); |
| |
| it('is robust without available functions', () => { |
| // This chooses replacing fuctions. |
| sandbox.stub(random, 'random').callsFake(() => { return 0.4; }); |
| |
| // We just ensure here that mutating this file doesn't throw. |
| loadAndMutate('mutate_function_call.js'); |
| }); |
| |
| it('optimizes functions in V8', () => { |
| // This omits function replacement and chooses V8 optimizations. |
| sandbox.stub(random, 'random').callsFake(() => { return 0.6; }); |
| |
| const source = loadAndMutate('mutate_function_call.js'); |
| const mutated = sourceHelpers.generateCode(source); |
| helpers.assertExpectedResult( |
| 'mutate_function_call_expected.js', mutated); |
| }); |
| |
| it('deoptimizes functions in V8', () => { |
| // This chooses V8 deoptimization. |
| sandbox.stub(random, 'random').callsFake(() => { return 0.8; }); |
| |
| const source = loadAndMutate('mutate_function_call.js'); |
| const mutated = sourceHelpers.generateCode(source); |
| helpers.assertExpectedResult( |
| 'mutate_function_call_deopt_expected.js', mutated); |
| }); |
| }); |