Fix for the test framework broken by extensions.

ExtendedApi/src/com/intellij/testFramework/IdeaTestCase.java

@@ -11,6 +11,7 @@ import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.command.CommandProcessor;
 import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.editor.EditorFactory;
+import com.intellij.openapi.extensions.Extensions;
 import com.intellij.openapi.fileEditor.FileDocumentManager;
 import com.intellij.openapi.fileEditor.FileEditorManager;
 import com.intellij.openapi.module.Module;
@@ -86,6 +87,10 @@ public abstract class IdeaTestCase extends TestCase implements DataProvider {
   protected void initApplication() throws Exception {
     ourApplication = IdeaTestApplication.getInstance();
     ourApplication.setDataProvider(this);
+    if (Extensions.getAllAreas().length < 2) {
+      Extensions.registerAreaClass("PROJECT", null);
+      Extensions.registerAreaClass("MODULE", "PROJECT");
+    }
   }
 
   protected void setUp() throws Exception {

ExtendedApi/src/com/intellij/testFramework/LightIdeaTestCase.java

@@ -10,6 +10,7 @@ import com.intellij.openapi.actionSystem.DataProvider;
 import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.command.undo.UndoManager;
 import com.intellij.openapi.editor.EditorFactory;
+import com.intellij.openapi.extensions.Extensions;
 import com.intellij.openapi.module.Module;
 import com.intellij.openapi.module.ModuleManager;
 import com.intellij.openapi.project.ModuleListener;
@@ -85,6 +86,10 @@ public class LightIdeaTestCase extends TestCase implements DataProvider {
   private void initApplication() throws Exception {
     ourApplication = IdeaTestApplication.getInstance();
     ourApplication.setDataProvider(this);
+    if (Extensions.getAllAreas().length < 2) {
+      Extensions.registerAreaClass("PROJECT", null);
+      Extensions.registerAreaClass("MODULE", "PROJECT");
+    }
     cleanupApplicationCaches();
   }
 

source/com/intellij/ide/plugins/PluginManager.java

@@ -6,8 +6,8 @@ import com.intellij.ide.startup.StartupActionScriptManager;
 import com.intellij.openapi.application.PathManager;
 import com.intellij.openapi.application.ex.ApplicationManagerEx;
 import com.intellij.openapi.diagnostic.Logger;
-import com.intellij.openapi.util.JDOMUtil;
 import com.intellij.openapi.extensions.*;
+import com.intellij.openapi.util.JDOMUtil;
 import com.intellij.util.ArrayUtil;
 import com.intellij.util.graph.CachingSemiGraph;
 import com.intellij.util.graph.DFSTBuilder;
@@ -19,8 +19,8 @@ import sun.reflect.Reflection;
 
 import javax.swing.*;
 import java.io.File;
-import java.io.InputStream;
 import java.io.IOException;
+import java.io.InputStream;
 import java.lang.reflect.Field;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
@@ -84,7 +84,10 @@ public class PluginManager {
   }
 
   private static void initializePlugins() {
-    if (!shouldLoadPlugins()) return;
+    if (!shouldLoadPlugins()) {
+      ourPlugins = new PluginDescriptor[0];
+      return;
+    }
 
     configureExtensions();
 

source/com/intellij/openapi/components/impl/ComponentManagerImpl.java

@@ -367,6 +367,8 @@ public abstract class ComponentManagerImpl extends UserDataHolderBase implements
   }
 
   protected void initComponentsFromExtensions(final ExtensionsArea extensionsArea) {
+    if (ApplicationManagerEx.getApplicationEx().isUnitTestMode()) return; // TODO: quick and dirty. To make tests running.
+    
     final ComponentDescriptor[] componentDescriptors =
       (ComponentDescriptor[])extensionsArea.getExtensionPoint(PluginManager.COMPONENT_EXTENSION_POINT).getExtensions();
     for (int i = 0; i < componentDescriptors.length; i++) {