[android] #4000 - add unit tests icon

platform/android/MapboxGLAndroidSDKTestApp/src/test/java/com/mapbox/mapboxsdk/annotations/IconTest.java

@@ -0,0 +1,55 @@
+package com.mapbox.mapboxsdk.annotations;
+
+import android.graphics.Bitmap;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import static junit.framework.Assert.assertEquals;
+import static junit.framework.Assert.assertNotSame;
+
+public class IconTest {
+
+    @Mock
+    Bitmap mBitmap;
+
+    @Before
+    public void beforeTest() {
+        MockitoAnnotations.initMocks(this);
+    }
+
+    @Test
+    public void testId() {
+        String id = "test";
+        Icon icon = IconFactory.recreate(id, Bitmap.createBitmap(0, 0, Bitmap.Config.ALPHA_8));
+        assertEquals("id should match", id, icon.getId());
+    }
+
+    @Test
+    public void testBitmap() {
+        Icon icon = IconFactory.recreate("test", mBitmap);
+        assertEquals("bitmap should match", mBitmap, icon.getBitmap());
+    }
+
+    @Test
+    public void testEquals() {
+        Icon icon1 = IconFactory.recreate("test", mBitmap);
+        Icon icon2 = IconFactory.recreate("test", mBitmap);
+        assertEquals("icons should not match", icon1, icon2);
+    }
+
+    @Test
+    public void testEqualsObject() {
+        Icon icon = IconFactory.recreate("test", Bitmap.createBitmap(0, 0, Bitmap.Config.ALPHA_8));
+        assertNotSame("icon should not match", new Object(), icon);
+    }
+
+    @Test
+    public void testHashcode() {
+        Icon icon = IconFactory.recreate("test", mBitmap);
+        long expectedHashcode = 31 * mBitmap.hashCode() + "test".hashCode();
+        assertEquals("hashcode should match", expectedHashcode, icon.hashCode());
+    }
+}