Add test case of the getColor method of MultiColorTrackPath when use dynamic speed track path descriptor.

MyTracks/src/com/google/android/apps/mytracks/maps/MultiColorTrackPath.java

@@ -20,6 +20,7 @@ import com.google.android.gms.maps.GoogleMap;
 import com.google.android.gms.maps.model.LatLng;
 import com.google.android.gms.maps.model.Polyline;
 import com.google.android.maps.mytracks.R;
+import com.google.common.annotations.VisibleForTesting;
 
 import android.content.Context;
 
@@ -102,7 +103,8 @@ public class MultiColorTrackPath implements TrackPath {
     TrackPathUtils.addPath(googleMap, paths, lastSegmentPoints, lastSegmentColor, useLastPolyline);
   }
 
-  private int getColor(int speed) {
+  @VisibleForTesting
+  protected int getColor(int speed) {
     if (speed <= trackPathDescriptor.getSlowSpeed()) {
       return slowColor;
     } else if (speed <= trackPathDescriptor.getNormalSpeed()) {
@@ -111,4 +113,16 @@ public class MultiColorTrackPath implements TrackPath {
       return fastColor;
     }
   }
+  
+  public int getSlowColor() {
+    return slowColor;
+  }
+
+  public int getNormalColor() {
+    return normalColor;
+  }
+
+  public int getFastColor() {
+    return fastColor;
+  }
 }

MyTracksTest/src/com/google/android/apps/mytracks/maps/MultiColorTrackPathTest.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.android.apps.mytracks.maps;
+
+import android.content.Context;
+import android.test.AndroidTestCase;
+
+/**
+ * Tests for the {@link MultiColorTrackPath}.
+ * 
+ * @author Youtao Liu
+ */
+public class MultiColorTrackPathTest extends AndroidTestCase {
+
+  MultiColorTrackPath multiColorTrackPath;
+  Context context;
+
+  @Override
+  protected void setUp() throws Exception {
+    context = getContext();
+    super.setUp();
+  }
+
+  /**
+   * Tests the {@link MultiColorTrackPath#getColor(int)} when use dynamic speed track path descriptor.
+   */
+  public void testGetColor_DynamicSpeedTrackPathDescriptor() {
+    DynamicSpeedTrackPathDescriptor dynamicSpeedTrackPathDescriptor = new DynamicSpeedTrackPathDescriptor(
+        context);
+    dynamicSpeedTrackPathDescriptor.setAverageMovingSpeed(50);
+    dynamicSpeedTrackPathDescriptor.setSpeedMargin(10);
+    multiColorTrackPath = new MultiColorTrackPath(context, dynamicSpeedTrackPathDescriptor);
+    
+    assertEquals(multiColorTrackPath.getSlowColor(), multiColorTrackPath.getColor(5));
+    assertEquals(multiColorTrackPath.getSlowColor(), multiColorTrackPath.getColor(44));
+    assertEquals(multiColorTrackPath.getNormalColor(), multiColorTrackPath.getColor(50));
+    assertEquals(multiColorTrackPath.getNormalColor(), multiColorTrackPath.getColor(54));
+    assertEquals(multiColorTrackPath.getFastColor(), multiColorTrackPath.getColor(56));
+    assertEquals(multiColorTrackPath.getFastColor(), multiColorTrackPath.getColor(100));
+
+    assertNotSame(multiColorTrackPath.getSlowColor(), multiColorTrackPath.getNormalColor());
+    assertNotSame(multiColorTrackPath.getSlowColor(), multiColorTrackPath.getFastColor());
+  }
+  
+}