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// 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 variables
*/
'use strict';
const babelTypes = require('@babel/types');
const sinon = require('sinon');
const common = require('../mutators/common.js');
const helpers = require('./helpers.js');
const scriptMutator = require('../script_mutator.js');
const sourceHelpers = require('../source_helpers.js');
const numberMutator = require('../mutators/number_mutator.js');
const random = require('../random.js');
const sandbox = sinon.createSandbox();
describe('Mutate numbers', () => {
beforeEach(() => {
sandbox.stub(common, 'nearbyRandomNumber').callsFake(
() => { return babelTypes.numericLiteral(-3) });
sandbox.stub(common, 'randomInterestingNumber').callsFake(
() => { return babelTypes.numericLiteral(-4) });
sandbox.stub(random, 'randInt').callsFake(() => { return -5 });
// Interesting cases from number mutator.
const interestingProbs = [0.009, 0.05, 0.5];
sandbox.stub(random, 'random').callsFake(
helpers.cycleProbabilitiesFun(interestingProbs));
});
afterEach(() => {
sandbox.restore();
});
it('test', () => {
const source = helpers.loadTestData('mutate_numbers.js');
const settings = scriptMutator.defaultSettings();
settings['MUTATE_NUMBERS'] = 1.0;
const mutator = new numberMutator.NumberMutator(settings);
mutator.mutate(source);
const mutated = sourceHelpers.generateCode(source);
helpers.assertExpectedResult(
'mutate_numbers_expected.js', mutated);
});
});
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