| // 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 Test normalization. |
| */ |
| |
| 'use strict'; |
| |
| const sinon = require('sinon'); |
| |
| const common = require('../mutators/common.js'); |
| const helpers = require('./helpers.js'); |
| const random = require('../random.js'); |
| const sourceHelpers = require('../source_helpers.js'); |
| const tryCatch = require('../mutators/try_catch.js'); |
| |
| const sandbox = sinon.createSandbox(); |
| |
| function loadSource() { |
| return helpers.loadTestData('try_catch.js'); |
| } |
| |
| function testTryCatch(source, expected) { |
| const mutator = new tryCatch.AddTryCatchMutator(); |
| mutator.mutate(source); |
| |
| const mutated = sourceHelpers.generateCode(source); |
| helpers.assertExpectedResult(expected, mutated); |
| } |
| |
| describe('Try catch', () => { |
| afterEach(() => { |
| sandbox.restore(); |
| }); |
| |
| // Wrap on exit, hence wrap everything nested. |
| it('wraps all', () => { |
| sandbox.stub(random, 'choose').callsFake(() => { return false; }); |
| sandbox.stub(random, 'random').callsFake(() => { return 0.7; }); |
| testTryCatch(loadSource(), 'try_catch_expected.js'); |
| }); |
| |
| // Wrap on enter and skip. |
| it('wraps toplevel', () => { |
| sandbox.stub(random, 'choose').callsFake(() => { return false; }); |
| sandbox.stub(random, 'random').callsFake(() => { return 0.04; }); |
| const source = loadSource(); |
| |
| // Fake source fraction 0.1 (i.e. the second of 10 files). |
| // Probability for toplevel try-catch is 0.05. |
| common.setSourceLoc(source, 1, 10); |
| |
| testTryCatch(source, 'try_catch_toplevel_expected.js'); |
| }); |
| |
| // Choose the rare case of skipping try-catch. |
| it('wraps nothing', () => { |
| sandbox.stub(random, 'choose').callsFake(() => { return false; }); |
| sandbox.stub(random, 'random').callsFake(() => { return 0.01; }); |
| const source = loadSource(); |
| |
| // Fake source fraction 0.1 (i.e. the second of 10 files). |
| // Probability for skipping is 0.02. |
| common.setSourceLoc(source, 1, 10); |
| |
| testTryCatch(source, 'try_catch_nothing_expected.js'); |
| }); |
| |
| // Choose to alter the target probability to 0.9 resulting in skipping |
| // all try-catch. |
| it('wraps nothing with high target probability', () => { |
| sandbox.stub(random, 'choose').callsFake(() => { return true; }); |
| sandbox.stub(random, 'uniform').callsFake(() => { return 0.9; }); |
| sandbox.stub(random, 'random').callsFake(() => { return 0.8; }); |
| const source = loadSource(); |
| |
| // Fake source fraction 0.9 (i.e. the last of 10 files). |
| // Probability for skipping is 0.81 (0.9 * 0.9). |
| common.setSourceLoc(source, 9, 10); |
| |
| testTryCatch(source, 'try_catch_alternate_expected.js'); |
| }); |
| }); |