DevTools: don't duplicate eval scripts on each panel switch.

webkit/glue/devtools/js/tests.js

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 
 /**
  * @fileoverview This file contains small testing framework along with the
  * test suite for the frontend. These tests are a part of the continues build
  * and are executed by the devtools_sanity_unittest.cc as a part of the
  * Interactive UI Test suite.
@@ skipping 376 matching lines @@
       }, true /* sticky */);
 
   this.showPanel('scripts');
 
   // Wait until all scripts are added to the debugger.
   this.takeControl();
 };
 
 
 /**
+ * Tests that scripts are not duplicaed on Scripts tab switch.
+ */
+TestSuite.prototype.testNoScriptDuplicatesOnPanelSwitch = function() {
+  var test = this;
+
+  // There should be two scripts: one for the main page and another
+  // one which is source of console API(see
+  // InjectedScript._ensureCommandLineAPIInstalled).
+  var expectedScriptsCount = 2;
+  var parsedScripts = [];
+
+
+  function switchToElementsTab() {
+    test.showPanel('elements');
+    setTimeout(switchToScriptsTab, 0);
+  }
+
+  function switchToScriptsTab() {
+    test.showPanel('scripts');
+    setTimeout(checkScriptsPanel, 0);
+  }
+
+  function checkScriptsPanel() {
+    test.assertTrue(!!WebInspector.panels.scripts.visibleView,
+                    'No visible script view.');
+    var select = WebInspector.panels.scripts.filesSelectElement;
+    test.assertEquals(expectedScriptsCount, select.options.length,
+                      'Unexpected options count');
+    test.releaseControl();
+  }
+
+  this.addSniffer(WebInspector, 'parsedScriptSource',
+      function(sourceID, sourceURL, source, startingLine) {
+        test.assertTrue(
+            parsedScripts.indexOf(sourceURL) == -1,
+            'Duplicated script: ' + sourceURL);
+        test.assertTrue(
+           parsedScripts.length < expectedScriptsCount,
+           'Too many scripts: ' + sourceURL);
+        parsedScripts.push(sourceURL);
+
+        if (parsedScripts.length == expectedScriptsCount) {
+          setTimeout(switchToElementsTab, 0);
+        }
+      }, true /* sticky */);
+
+  this.showPanel('scripts');
+
+  // Wait until all scripts are added to the debugger.
+  this.takeControl();
+};
+
+
+/**
  * Tests that a breakpoint can be set.
  */
 TestSuite.prototype.testSetBreakpoint = function() {
   var parsedDebuggerTestPageHtml = false;
   var parsedDebuggerTestJs = false;
 
   this.showPanel('scripts');
 
   var scriptUrl = null;
   var breakpointLine = 12;
@@ skipping 212 matching lines @@
 /**
  * Run specified test on a fresh instance of the test suite.
  * @param {string} name Name of a test method from TestSuite class.
  */
 uiTests.runTest = function(name) {
   new TestSuite().runTest(name);
 };
 
 
 }