901c29eb1c
R=jgruber@chromium.org, kozyatinskiy@chromium.org, pfeldman@chromium.org BUG=v8:5808 Review-Url: https://codereview.chromium.org/2700743002 Cr-Commit-Position: refs/heads/master@{#43363}
69 lines
1.4 KiB
JavaScript
69 lines
1.4 KiB
JavaScript
// Copyright 2017 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax --no-always-opt
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// Test precise code coverage.
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function GetCoverage(source) {
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for (var script of %DebugCollectCoverage()) {
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if (script.script.source == source) return script;
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}
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return undefined;
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}
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function TestCoverage(name, source, expectation) {
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source = source.trim();
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eval(source);
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%CollectGarbage("collect dead objects");
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var coverage = GetCoverage(source);
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var result = JSON.stringify(coverage);
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print(result);
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assertEquals(JSON.stringify(expectation), result, name + " failed");
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}
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// Without precise coverage enabled, we lose coverage data to the GC.
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TestCoverage(
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"call an IIFE",
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`
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(function f() {})();
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`,
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undefined // The IIFE has been garbage-collected.
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);
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TestCoverage(
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"call locally allocated function",
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`
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for (var i = 0; i < 10; i++) {
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let f = () => 1;
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i += f();
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}
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`,
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undefined
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);
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// This does not happen with precise coverage enabled.
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%DebugTogglePreciseCoverage(true);
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TestCoverage(
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"call an IIFE",
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`
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(function f() {})();
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`,
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[{"start":0,"end":20,"count":1},{"start":1,"end":16,"count":1}]
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);
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TestCoverage(
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"call locally allocated function",
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`
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for (var i = 0; i < 10; i++) {
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let f = () => 1;
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i += f();
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}
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`,
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[{"start":0,"end":63,"count":1},{"start":41,"end":48,"count":5}]
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);
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%DebugTogglePreciseCoverage(false);
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