Remove view mode enum and add tests

Change-Id: Ie9bc74173047bdd80dacf943f1968d392d24e00f

1 files changed, 84 insertions, 0 deletions

diff --git a/tests/src/com/android/mail/ui/ViewModeTests.java b/tests/src/com/android/mail/ui/ViewModeTests.java
new file mode 100644
index 000000000..9e0add0b2
--- /dev/null
+++ b/tests/src/com/android/mail/ui/ViewModeTests.java
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2012 Google Inc.
+ * Licensed to The Android Open Source Project.
+ *
+ * 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.android.mail.ui;
+
+import android.os.Bundle;
+import android.test.AndroidTestCase;
+import android.test.suitebuilder.annotation.SmallTest;
+import android.test.suitebuilder.annotation.Smoke;
+
+import com.android.mail.ui.ViewMode.ModeChangeListener;
+
+@Smoke
+public class ViewModeTests extends AndroidTestCase {
+    /**
+     * Saving and restoring a view mode work correctly.
+     */
+    @SmallTest
+    public void testBundleSaveRestorePreserveState() {
+        Bundle state = new Bundle();
+        ViewMode first = new ViewMode(this.mContext);
+        // Set the state to something known.
+        assertTrue(first.transitionToConversationListMode());
+        first.handleSaveInstanceState(state);
+        ViewMode second = new ViewMode(this.mContext);
+        second.handleRestore(state);
+        assertTrue(second.isConversationListMode());
+    }
+
+    /**
+     * Register a listener for mode changes. Change a mode, and verify that the listener was
+     * called. Then unregister the listener and change the mode again. Verify that the listener
+     * was NOT called.
+     */
+    @SmallTest
+    public void testListenerCalledAfterRegistering() {
+        Bundle state = new Bundle();
+        class Ears implements ModeChangeListener {
+            public int numCalls = 0;
+            @Override
+            public void onViewModeChanged(ViewMode mode) {
+                numCalls++;
+            }
+        }
+
+        ViewMode mode = new ViewMode(this.mContext);
+        Ears ears = new Ears();
+        mode.addListener(ears);
+        assertTrue(mode.transitionToConversationListMode());
+        assertEquals(ears.numCalls, 1);
+        mode.removeListener(ears);
+        assertTrue(mode.transitionToConversationMode());
+        assertEquals(ears.numCalls, 1);
+    }
+
+    /**
+     * The view mode can transition to a state only if it isn't already in that state.
+     */
+    @SmallTest
+    public void testMultipleTransitionsFail() {
+        Bundle state = new Bundle();
+        ViewMode first = new ViewMode(this.mContext);
+        // Set the state to something known.
+        assertTrue(first.transitionToConversationListMode());
+        assertTrue(first.isConversationListMode());
+        // Cannot transition to Conversation List mode. I'm in it already.
+        assertFalse(first.transitionToConversationListMode());
+        assertTrue(first.isConversationListMode());
+    }
+}
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