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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 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', () => {
sandbox.stub(random, 'random').callsFake(() => { return 0.3; });
// We just ensure here that mutating this file doesn't throw.
loadAndMutate('mutate_function_call.js');
});
it('optimizes functions in V8', () => {
sandbox.stub(random, 'random').callsFake(() => { return 0.5; });
const source = loadAndMutate('mutate_function_call.js');
const mutated = sourceHelpers.generateCode(source);
helpers.assertExpectedResult(
'mutate_function_call_expected.js', mutated);
});
it('compiles functions in V8 to baseline', () => {
sandbox.stub(random, 'random').callsFake(() => { return 0.7; });
const source = loadAndMutate('mutate_function_call.js');
const mutated = sourceHelpers.generateCode(source);
helpers.assertExpectedResult(
'mutate_function_call_baseline_expected.js', mutated);
});
it('deoptimizes functions in V8', () => {
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);
});
});
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