A little work on unit testing.

Add emma and mockito to the Maven build, and test a
couple random things.

1 files changed, 80 insertions, 0 deletions

diff --git a/src/test/java/com/android/volley/toolbox/ImageLoaderTest.java b/src/test/java/com/android/volley/toolbox/ImageLoaderTest.java
new file mode 100644
index 0000000..47c55a6
--- /dev/null
+++ b/src/test/java/com/android/volley/toolbox/ImageLoaderTest.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2015 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.volley.toolbox;
+
+import android.graphics.Bitmap;
+import com.android.volley.Request;
+import com.android.volley.RequestQueue;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
+
+import static org.mockito.Mockito.*;
+
+@RunWith(RobolectricTestRunner.class)
+public class ImageLoaderTest {
+    private RequestQueue mRequestQueue;
+    private ImageLoader.ImageCache mImageCache;
+    private ImageLoader mImageLoader;
+
+    @Before
+    public void setUp() {
+        mRequestQueue = mock(RequestQueue.class);
+        mImageCache = mock(ImageLoader.ImageCache.class);
+        mImageLoader = new ImageLoader(mRequestQueue, mImageCache);
+    }
+
+    @Test
+    public void isCachedChecksCache() throws Exception {
+        when(mImageCache.getBitmap(anyString())).thenReturn(null);
+        Assert.assertFalse(mImageLoader.isCached("http://foo", 0, 0));
+    }
+
+    @Test
+    public void getWithCacheHit() throws Exception {
+        Bitmap bitmap = Bitmap.createBitmap(1, 1, null);
+        ImageLoader.ImageListener listener = mock(ImageLoader.ImageListener.class);
+        when(mImageCache.getBitmap(anyString())).thenReturn(bitmap);
+        ImageLoader.ImageContainer ic = mImageLoader.get("http://foo", listener);
+        Assert.assertSame(bitmap, ic.getBitmap());
+        verify(listener).onResponse(ic, true);
+    }
+
+    @Test
+    public void getWithCacheMiss() throws Exception {
+        when(mImageCache.getBitmap(anyString())).thenReturn(null);
+        ImageLoader.ImageListener listener = mock(ImageLoader.ImageListener.class);
+        // Ask for the image to be loaded.
+        mImageLoader.get("http://foo", listener);
+        // Second pass to test deduping logic.
+        mImageLoader.get("http://foo", listener);
+        // Response callback should be called both times.
+        verify(listener, times(2)).onResponse(any(ImageLoader.ImageContainer.class), eq(true));
+        // But request should be enqueued only once.
+        verify(mRequestQueue, times(1)).add(any(Request.class));
+    }
+
+    @Test
+    public void publicMethods() throws Exception {
+        // Catch API breaking changes.
+        ImageLoader.getImageListener(null, -1, -1);
+        mImageLoader.setBatchedResponseDelay(1000);
+    }
+}
+