[inspector] added master test for break locations

test/inspector/debugger/get-possible-breakpoints-master.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.
+
+print('Checks Debugger.getPossibleBreakpoints');
+
+var source = read('test/inspector/debugger/resources/break-locations.js');
+InspectorTest.addScript(source);
+
+Protocol.Debugger.onceScriptParsed()
+  .then(message => Protocol.Debugger.getPossibleBreakpoints({ start: { lineNumber: 0, columnNumber : 0, scriptId: message.params.scriptId }}))
+  .then(dumpAllLocations)
+  .then(InspectorTest.completeTest);
+Protocol.Debugger.enable();
+
+function dumpAllLocations(message) {
+  if (message.error) {
+    InspectorTest.logMessage(message);
+    return;
+  }
+  var lines = source.split('\n');
+  var locations = message.result.locations.sort((loc1, loc2) => {
+    if (loc2.lineNumber !== loc1.lineNumber) return loc2.lineNumber - loc1.lineNumber;
+    return loc2.columnNumber - loc1.columnNumber;
+  });
+  for (var location of locations) {
+    var line = lines[location.lineNumber];
+    line = line.slice(0, location.columnNumber) + '#' + line.slice(location.columnNumber);
+    lines[location.lineNumber] = line;
+  }
+  InspectorTest.log(lines.join('\n'));
+  return message;
+}