[inspector] extend protocol for code coverage.

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((result) => InspectorTest.logMessage(result))

[kozy, 2017/02/21 17:57:29]

.then(InspectorTest.logMessage)

+      .then(() => Protocol.Runtime.takePreciseCoverage())
+      .then((result) => InspectorTest.logMessage(result))
+      .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((result) => InspectorTest.logMessage(result))
+      .then(ClearAndGC)
+      .then(() => Protocol.Runtime.takePreciseCoverage())
+      .then((result) => InspectorTest.logMessage(result))
+      .then(ClearAndGC)
+      .then(() => Protocol.Runtime.disable())
+      .then(() => next());

[kozy, 2017/02/21 17:57:30]

.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((result) => InspectorTest.logMessage(result))
+      .then(ClearAndGC)
+      .then(() => Protocol.Runtime.takeBestEffortCoverage())
+      .then((result) => InspectorTest.logMessage(result))
+      .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((result) => InspectorTest.logMessage(result))
+      .then(ClearAndGC)
+      .then(() => Protocol.Runtime.takeBestEffortCoverage())
+      .then((result) => InspectorTest.logMessage(result))
+      .then(ClearAndGC)
+      .then(() => Protocol.Runtime.stopPreciseCoverage())
+      .then(() => Protocol.Runtime.disable())
+      .then(() => next());
+  },
+]);