Add ability to GWTMockUtilities to stub out Messages for better unit testing.
Review at http://gwt-code-reviews.appspot.com/1581804
git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@10723 8db76d5a-ed1c-0410-87a9-c151d255dfc7
diff --git a/user/src/com/google/gwt/junit/GWTDummyBridge.java b/user/src/com/google/gwt/junit/GWTDummyBridge.java
index f3adda7..ca0cb6e 100644
--- a/user/src/com/google/gwt/junit/GWTDummyBridge.java
+++ b/user/src/com/google/gwt/junit/GWTDummyBridge.java
@@ -17,6 +17,7 @@
import com.google.gwt.core.client.GWTBridge;
import com.google.gwt.dev.About;
+import com.google.gwt.i18n.client.Messages;
import java.util.logging.Level;
import java.util.logging.Logger;
@@ -29,12 +30,26 @@
class GWTDummyBridge extends GWTBridge {
private static final Logger logger = Logger.getLogger(GWTDummyBridge.class.getName());
+ private boolean fakeMessages = false;
+
/**
* Returns null.
*/
@Override
public <T> T create(Class<?> classLiteral) {
- return null;
+ if (fakeMessages && (classLiteral != null ) && Messages.class.isAssignableFrom(classLiteral)) {
+ return (T) FakeMessagesMaker.create((Class<? extends Messages>) classLiteral);
+ } else {
+ return null;
+ }
+ }
+
+ /**
+ * Makes the create() method return mock/fake Messages, when the specified
+ * class is assignable to Messages.
+ */
+ public void enableMockMessages() {
+ fakeMessages = true;
}
/**
diff --git a/user/src/com/google/gwt/junit/GWTMockUtilities.java b/user/src/com/google/gwt/junit/GWTMockUtilities.java
index 906aea4..63f1e4a 100644
--- a/user/src/com/google/gwt/junit/GWTMockUtilities.java
+++ b/user/src/com/google/gwt/junit/GWTMockUtilities.java
@@ -26,6 +26,8 @@
* other UIObjects.
*/
public class GWTMockUtilities {
+
+ private static GWTDummyBridge dummyBridge;
/**
* Replace the normal GWT.create() behavior with a method that returns null
@@ -66,12 +68,24 @@
* </pre>
*/
public static void disarm() {
- GWTBridge bridge = new GWTDummyBridge();
- setGwtBridge(bridge);
+ dummyBridge = new GWTDummyBridge();
+ setGwtBridge(dummyBridge);
}
public static void restore() {
setGwtBridge(null);
+ dummyBridge = null;
+ }
+
+ /**
+ * After {@see #disarm()} replaces the normal GWT.create(), this method
+ * enables Messages to be faked out. The fake instance creation is delegated
+ * to {@see FakeMessagesMaker}.
+ */
+ public static void returnMockMessages() {
+ if (dummyBridge != null) {
+ dummyBridge.enableMockMessages();
+ }
}
/**
diff --git a/user/test/com/google/gwt/junit/GWTMockUtilitiesTest.java b/user/test/com/google/gwt/junit/GWTMockUtilitiesTest.java
new file mode 100644
index 0000000..6c52099
--- /dev/null
+++ b/user/test/com/google/gwt/junit/GWTMockUtilitiesTest.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.google.gwt.junit;
+
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.i18n.client.Messages;
+import com.google.gwt.i18n.client.LocalizableResource.Description;
+import com.google.gwt.i18n.client.Messages.DefaultMessage;
+
+import junit.framework.TestCase;
+
+/**
+ * Test of {@see GWTMockUtilities}
+ */
+public class GWTMockUtilitiesTest extends TestCase {
+ interface MyMessages extends Messages {
+ @DefaultMessage("Isn''t this the fakiest?")
+ @Description("A sample message to be tested.")
+ String myMessage();
+ }
+
+ public void testWithoutDisarm() {
+ try {
+ GWT.create(MyMessages.class);
+ fail("Calling GWT.create() without disarming should have failed.");
+ } catch (UnsupportedOperationException ex) {
+ // expected this exception
+ }
+ }
+
+ public void testDisarm() {
+ GWTMockUtilities.disarm();
+ assertNull(GWT.create(MyMessages.class));
+ GWTMockUtilities.restore();
+ }
+
+ public void testReturnMockMessages() {
+ GWTMockUtilities.disarm();
+ GWTMockUtilities.returnMockMessages();
+ assertNotNull(GWT.create(MyMessages.class));
+ assertNull(GWT.create(String.class));
+ assertNull(GWT.create(null));
+ GWTMockUtilities.restore();
+ }
+}
diff --git a/user/test/com/google/gwt/junit/JUnitSuite.java b/user/test/com/google/gwt/junit/JUnitSuite.java
index 72ed980..e225dff 100644
--- a/user/test/com/google/gwt/junit/JUnitSuite.java
+++ b/user/test/com/google/gwt/junit/JUnitSuite.java
@@ -41,6 +41,7 @@
suite.addTestSuite(CompileStrategyTest.class);
suite.addTestSuite(FakeMessagesMakerTest.class);
+ suite.addTestSuite(GWTMockUtilitiesTest.class);
suite.addTestSuite(JUnitMessageQueueTest.class);
suite.addTestSuite(GWTTestCaseNoClientTest.class);
