| // Copyright 2017 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. |
| |
| // Flags: --allow-natives-syntax --no-always-opt |
| |
| // Test precise code coverage. |
| |
| function GetCoverage(source) { |
| for (var script of %DebugCollectCoverage()) { |
| if (script.script.source == source) return script; |
| } |
| return undefined; |
| } |
| |
| function TestCoverage(name, source, expectation) { |
| source = source.trim(); |
| eval(source); |
| %CollectGarbage("collect dead objects"); |
| var coverage = GetCoverage(source); |
| var result = JSON.stringify(coverage); |
| print(result); |
| assertEquals(JSON.stringify(expectation), result, name + " failed"); |
| } |
| |
| // Without precise coverage enabled, we lose coverage data to the GC. |
| TestCoverage( |
| "call an IIFE", |
| ` |
| (function f() {})(); |
| `, |
| undefined // The IIFE has been garbage-collected. |
| ); |
| |
| TestCoverage( |
| "call locally allocated function", |
| ` |
| for (var i = 0; i < 10; i++) { |
| let f = () => 1; |
| i += f(); |
| } |
| `, |
| undefined |
| ); |
| |
| // This does not happen with precise coverage enabled. |
| %DebugTogglePreciseCoverage(true); |
| |
| TestCoverage( |
| "call an IIFE", |
| ` |
| (function f() {})(); |
| `, |
| [{"start":0,"end":20,"count":1},{"start":1,"end":16,"count":1}] |
| ); |
| |
| TestCoverage( |
| "call locally allocated function", |
| ` |
| for (var i = 0; i < 10; i++) { |
| let f = () => 1; |
| i += f(); |
| } |
| `, |
| [{"start":0,"end":63,"count":1},{"start":41,"end":48,"count":5}] |
| ); |
| |
| %DebugTogglePreciseCoverage(false); |