Generate hashCode and equals for Messages (#68)

* hashCode proxying fix

Fixing a problem with hashCode method causing this exception:
Caused by: java.lang.IllegalArgumentException: hashCode must return
either String or SafeHtml
	at
com.google.gwtmockito.fakes.ExtendedFakeMessagesProvider$1.invoke(ExtendedFakeMessagesProvider.java:61)
	at com.sun.proxy.$Proxy8.hashCode(Unknown Source)
	...

* hashCode and equals fix when fake types are used e.g. by collections.

* Revert "hashCode and equals fix when fake types are used e.g. by collections."

This reverts commit 1ab81fa.

* hashCode and equals fix when fake types are used e.g. by collections.

Author: zolv

gwtmockito/src/main/java/com/google/gwtmockito/fakes/FakeMessagesProvider.java

@@ -51,6 +51,10 @@ public T getFake(Class<?> type) {
           public Object invoke(Object proxy, Method method, Object[] args) throws Exception {
             if (method.getName().equals("ensureInjected")) {
               return true;
+            } else if (method.getName().equals("hashCode")) {
+              return proxy.hashCode();
+            } else if (method.getName().equals("equals")) {
+              return proxy.getClass().equals(args[0].getClass());
             } else if (method.getReturnType() == String.class) {
               return buildMessage(method, args);
             } else if (method.getReturnType() == SafeHtml.class) {

gwtmockito/src/test/java/com/google/gwtmockito/GwtMockitoTest.java

@@ -28,6 +28,7 @@
 import com.google.gwt.cell.client.AbstractCell;
 import com.google.gwt.core.client.JavaScriptObject;
 import com.google.gwt.core.shared.GWT;
+import com.google.gwt.dev.util.collect.HashSet;
 import com.google.gwt.dom.client.DivElement;
 import com.google.gwt.dom.client.Document;
 import com.google.gwt.dom.client.Element;
@@ -77,6 +78,7 @@
 import com.google.gwt.user.client.ui.Widget;
 import com.google.gwt.user.datepicker.client.DatePicker;
 import com.google.gwtmockito.fakes.FakeProvider;
+import com.mls.web.client.core.ui.components.video.VideoCss;
 
 import org.hamcrest.BaseMatcher;
 import org.hamcrest.CoreMatchers;
@@ -89,6 +91,7 @@
 import org.mockito.Mock;
 
 import java.util.Date;
+import java.util.Set;
 
 /**
  * Tests for {@link GwtMockito} when running with {@link GwtMockitoTestRunner}.
@@ -161,6 +164,21 @@ public void shouldCreateFakeMessages() {
             UriUtils.fromSafeConstant("http://uriY")).asString());
   }
 
+  @Test
+  public void shouldGenerateHashCodeForMessages() {
+    SampleMessages messages = GWT.create(SampleMessages.class);
+    SampleMessages2 messages2 = GWT.create(SampleMessages2.class);
+
+    final Set<Messages> set = new HashSet<>();
+
+    set.add(messages);
+    set.add(messages2);
+    assertEquals(2, set.size());
+
+    set.add(messages);
+    assertEquals(2, set.size());
+  }
+
   @Test
   public void shouldCreateFakeCssResources() {
     SampleCss css = GWT.create(SampleCss.class);
@@ -712,6 +730,10 @@ interface SampleMessages extends Messages {
     SafeHtml safeHtmlWithUri(SafeHtml arg1, SafeUri arg2);
   }
 
+  interface SampleMessages2 extends SampleMessages {
+
+  }
+
   interface SampleCss extends CssResource {
     String style1();
     String style2();