test/inspector/runtime/coverage.js

// 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.

var source =
`
function fib(x) {
  if (x < 2) return 1;
  return fib(x-1) + fib(x-2);
}
(function iife() {
  return 1;
})();
fib(5);
`;

print("Test collecting code coverage data with Runtime.collectCoverage.");

function ClearAndGC() {
  return Protocol.Runtime.evaluate({ expression: "fib = null;" })
           .then(() => Protocol.HeapProfiler.enable())
           .then(() => Protocol.HeapProfiler.collectGarbage())
           .then(() => Protocol.HeapProfiler.disable());
}

InspectorTest.runTestSuite([
  function testPreciseCoverage(next)
  {
    Protocol.Runtime.enable()
      .then(Protocol.Runtime.startPreciseCoverage)
      .then(() => Protocol.Runtime.compileScript({ expression: source, sourceURL: "1", persistScript: true }))
      .then((result) => Protocol.Runtime.runScript({ scriptId: result.result.scriptId }))
      .then(ClearAndGC)
      .then(InspectorTest.logMessage)
      .then(Protocol.Runtime.takePreciseCoverage)
      .then(InspectorTest.logMessage)
      .then(Protocol.Runtime.takePreciseCoverage)
      .then(InspectorTest.logMessage)
      .then(ClearAndGC)
      .then(Protocol.Runtime.stopPreciseCoverage)
      .then(Protocol.Runtime.disable)
      .then(next);
  },
  function testPreciseCoverageFail(next)
  {
    Protocol.Runtime.enable()
      .then(() => Protocol.Runtime.compileScript({ expression: source, sourceURL: "2", persistScript: true }))
      .then((result) => Protocol.Runtime.runScript({ scriptId: result.result.scriptId }))
      .then(InspectorTest.logMessage)
      .then(ClearAndGC)
      .then(Protocol.Runtime.takePreciseCoverage)
      .then(InspectorTest.logMessage)
      .then(ClearAndGC)
      .then(Protocol.Runtime.disable)
      .then(next);
  },
  function testBestEffortCoverage(next)
  {
    Protocol.Runtime.enable()
      .then(() => Protocol.Runtime.compileScript({ expression: source, sourceURL: "3", persistScript: true }))
      .then((result) => Protocol.Runtime.runScript({ scriptId: result.result.scriptId }))
      .then(InspectorTest.logMessage)
      .then(ClearAndGC)
      .then(Protocol.Runtime.getBestEffortCoverage)
      .then(InspectorTest.logMessage)
      .then(Protocol.Runtime.getBestEffortCoverage)
      .then(InspectorTest.logMessage)
      .then(ClearAndGC)
      .then(Protocol.Runtime.disable)
      .then(next);
  },
  function testBestEffortCoveragePrecise(next)
  {
    Protocol.Runtime.enable()
      .then(Protocol.Runtime.startPreciseCoverage)
      .then(() => Protocol.Runtime.compileScript({ expression: source, sourceURL: "4", persistScript: true }))
      .then((result) => Protocol.Runtime.runScript({ scriptId: result.result.scriptId }))
      .then(InspectorTest.logMessage)
      .then(ClearAndGC)
      .then(Protocol.Runtime.getBestEffortCoverage)
      .then(InspectorTest.logMessage)
      .then(Protocol.Runtime.getBestEffortCoverage)
      .then(InspectorTest.logMessage)
      .then(ClearAndGC)
      .then(Protocol.Runtime.stopPreciseCoverage)
      .then(Protocol.Runtime.disable)
      .then(next);
  },
]);