[inspector] introduced Debugger.scheduleStepIntoAsync

test/inspector/debugger/schedule-step-into-async.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.
+
+InspectorTest.log('Checks Debugger.scheduleStepIntoAsync.');
+
+InspectorTest.addScript(`
+function testNoScheduledTask() {
+  debugger;
+  return 42;
+}
+
+function testSimple() {

[dgozman, 2017/03/03 19:47:06]

Do we test for a couple step-ins before the task is actually triggered?

var p = Promise.resolve();
debugger;       // scheduleAsyncStepIn, stepIn
var a = 1;      // stepIn
p.then(v => v)  // stepIn goes into callback.

[kozy, 2017/03/03 23:14:02]

But if I scheduledAsyncStepIn at debugger statement and make stepIn - execution
will be paused in var a = 1; and no async task would be scheduled in between -
it means that scheduleAsyncStepIn will return an error.

+  debugger;
+  Promise.resolve().then(v => v * 2);
+}
+
+function testNotResolvedPromise() {
+  var resolveCallback;
+  var p = new Promise(resolve => resolveCallback = resolve);
+  debugger;
+  p.then(v => v * 2);
+  resolveCallback();
+}
+
+function testTwoAsyncTasks() {
+  debugger;
+  Promise.resolve().then(v => v * 2);
+  Promise.resolve().then(v => v * 4);
+}
+
+function testTwoAsyncTasksWithBreak() {
+  debugger;
+  Promise.resolve().then(v => v * 2);
+  debugger;
+  Promise.resolve().then(v => v * 4);
+}
+
+function testPromiseAll() {
+  debugger;
+  Promise.all([ Promise.resolve(), Promise.resolve() ]).then(v => v * 2);
+}
+
+function testBlackboxedCreatePromise() {
+  debugger;
+  createPromise().then(v => v * 2);
+}
+//# sourceURL=test.js`);
+
+InspectorTest.addScript(`
+
+function createPromise() {
+  return Promise.resolve().then(v => v * 3).then(v => v * 4);
+}
+
+//# sourceURL=framework.js`)
+
+InspectorTest.setupScriptMap();
+
+Protocol.Debugger.enable();
+InspectorTest.runAsyncTestSuite([
+  async function testScheduleErrors() {
+    Protocol.Runtime.evaluate({ expression: 'testNoScheduledTask()' });
+    await waitPauseAndDumpLocation();
+    Protocol.Debugger.scheduleStepIntoAsync().then(InspectorTest.logMessage);
+    Protocol.Debugger.scheduleStepIntoAsync().then(InspectorTest.logMessage);
+    Protocol.Debugger.stepInto();
+    await waitPauseAndDumpLocation();
+    await Protocol.Debugger.resume();
+  },
+
+  async function testSimple() {
+    Protocol.Runtime.evaluate({ expression: 'testSimple()' });
+    await waitPauseAndDumpLocation();
+    Protocol.Debugger.stepOver();
+    await waitPauseAndDumpLocation();
+    Protocol.Debugger.scheduleStepIntoAsync().then(InspectorTest.logMessage);
+    Protocol.Debugger.stepInto();
+    await waitPauseAndDumpLocation();
+    await Protocol.Debugger.resume();
+  },
+
+  async function testNotResolvedPromise() {
+    Protocol.Runtime.evaluate({ expression: 'testNotResolvedPromise()' });
+    await waitPauseAndDumpLocation();
+    Protocol.Debugger.stepOver();
+    await waitPauseAndDumpLocation();
+    Protocol.Debugger.scheduleStepIntoAsync().then(InspectorTest.logMessage);
+    Protocol.Debugger.stepInto();
+    await waitPauseAndDumpLocation();
+    await Protocol.Debugger.resume();
+  },
+
+  async function testTwoAsyncTasks() {
+    Protocol.Runtime.evaluate({ expression: 'testTwoAsyncTasks()' });
+    await waitPauseAndDumpLocation();
+    Protocol.Debugger.scheduleStepIntoAsync().then(InspectorTest.logMessage);
+    Protocol.Debugger.resume();
+    await waitPauseAndDumpLocation();
+    await Protocol.Debugger.resume();
+  },
+
+  async function testTwoTasksAndGoToSecond() {
+    Protocol.Runtime.evaluate({ expression: 'testTwoAsyncTasks()' });
+    await waitPauseAndDumpLocation();
+    Protocol.Debugger.stepOver();
+    await waitPauseAndDumpLocation();
+    Protocol.Debugger.stepOver();
+    await waitPauseAndDumpLocation();
+    Protocol.Debugger.scheduleStepIntoAsync().then(InspectorTest.logMessage);
+    Protocol.Debugger.resume();
+    await waitPauseAndDumpLocation();
+    await Protocol.Debugger.resume();
+  },
+
+  async function testTwoAsyncTasksWithBreak() {
+    Protocol.Runtime.evaluate({ expression: 'testTwoAsyncTasksWithBreak()' });
+    await waitPauseAndDumpLocation();
+    Protocol.Debugger.stepOver();
+    await waitPauseAndDumpLocation();
+    Protocol.Debugger.scheduleStepIntoAsync().then(InspectorTest.logMessage);
+    Protocol.Debugger.resume();
+    await waitPauseAndDumpLocation();
+    Protocol.Debugger.scheduleStepIntoAsync().then(InspectorTest.logMessage);
+    Protocol.Debugger.resume();
+    await waitPauseAndDumpLocation();
+    await Protocol.Debugger.resume();
+  },
+
+  async function testPromiseAll() {
+    Protocol.Runtime.evaluate({ expression: 'testPromiseAll()' });
+    await waitPauseAndDumpLocation();
+    Protocol.Debugger.stepOver();
+    await waitPauseAndDumpLocation();
+    Protocol.Debugger.scheduleStepIntoAsync().then(InspectorTest.logMessage);
+    Protocol.Debugger.stepOver();
+    await waitPauseAndDumpLocation();
+    await Protocol.Debugger.resume();
+  },
+
+  async function testWithBlackboxedCode() {
+    Protocol.Runtime.evaluate({ expression: 'testBlackboxedCreatePromise()' });
+    await waitPauseAndDumpLocation();
+    Protocol.Debugger.stepOver();
+    await waitPauseAndDumpLocation();
+    await Protocol.Debugger.setBlackboxPatterns({patterns: ['framework\.js'] });
+    Protocol.Debugger.scheduleStepIntoAsync().then(InspectorTest.logMessage);
+    Protocol.Debugger.stepOver();
+    await waitPauseAndDumpLocation();
+    await Protocol.Debugger.resume();
+  }
+]);
+
+async function waitPauseAndDumpLocation() {
+  var message = await Protocol.Debugger.oncePaused();
+  InspectorTest.log('paused at:');
+  InspectorTest.logCallFrameSourceLocation(message.params.callFrames[0]);
+  return message;
+}