Add simple test for StatusBarIconList.

Test: runtest --path frameworks/base/packages/SystemUI/tests

Change-Id: Ic65195624b42504d4f4b366f1c5386ee9b48a07f

packages/SystemUI/tests/src/com/android/systemui/statusbar/StatusBarIconListTest.java

@@ -0,0 +1,85 @@
+package com.android.systemui.statusbar;
+
+import static junit.framework.Assert.assertEquals;
+import static junit.framework.Assert.assertNull;
+
+import static org.mockito.Mockito.mock;
+
+import android.support.test.runner.AndroidJUnit4;
+import android.test.suitebuilder.annotation.SmallTest;
+
+import com.android.internal.statusbar.StatusBarIcon;
+import com.android.systemui.SysuiTestCase;
+import com.android.systemui.statusbar.phone.StatusBarIconList;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class StatusBarIconListTest extends SysuiTestCase {
+
+    private final static String[] STATUS_BAR_SLOTS = {"aaa", "bbb", "ccc"};
+
+    @Test
+    public void testGetExistingSlot() {
+        StatusBarIconList statusBarIconList = new StatusBarIconList(STATUS_BAR_SLOTS);
+        assertEquals(1, statusBarIconList.getSlotIndex("bbb"));
+        assertEquals(2, statusBarIconList.getSlotIndex("ccc"));
+    }
+
+    @Test
+    public void testGetNonexistingSlot() {
+        StatusBarIconList statusBarIconList = new StatusBarIconList(STATUS_BAR_SLOTS);
+        assertEquals(0, statusBarIconList.getSlotIndex("aaa"));
+        assertEquals(3, statusBarIconList.size());
+        assertEquals(0, statusBarIconList.getSlotIndex("zzz")); // new content added in front
+        assertEquals(1, statusBarIconList.getSlotIndex("aaa")); // slid back
+        assertEquals(4, statusBarIconList.size());
+    }
+
+    @Test
+    public void testAddSlotSlidesIcons() {
+        StatusBarIconList statusBarIconList = new StatusBarIconList(STATUS_BAR_SLOTS);
+        StatusBarIcon sbIcon = mock(StatusBarIcon.class);
+        statusBarIconList.setIcon(0, sbIcon);
+        statusBarIconList.getSlotIndex("zzz"); // new content added in front
+        assertNull(statusBarIconList.getIcon(0));
+        assertEquals(sbIcon, statusBarIconList.getIcon(1));
+    }
+
+    @Test
+    public void testGetAndSetIcon() {
+        StatusBarIconList statusBarIconList = new StatusBarIconList(STATUS_BAR_SLOTS);
+        StatusBarIcon sbIconA = mock(StatusBarIcon.class);
+        StatusBarIcon sbIconB = mock(StatusBarIcon.class);
+        statusBarIconList.setIcon(0, sbIconA);
+        statusBarIconList.setIcon(1, sbIconB);
+        assertEquals(sbIconA, statusBarIconList.getIcon(0));
+        assertEquals(sbIconB, statusBarIconList.getIcon(1));
+        assertNull(statusBarIconList.getIcon(2)); // icon not set
+    }
+
+    @Test
+    public void testRemoveIcon() {
+        StatusBarIconList statusBarIconList = new StatusBarIconList(STATUS_BAR_SLOTS);
+        StatusBarIcon sbIconA = mock(StatusBarIcon.class);
+        StatusBarIcon sbIconB = mock(StatusBarIcon.class);
+        statusBarIconList.setIcon(0, sbIconA);
+        statusBarIconList.setIcon(1, sbIconB);
+        statusBarIconList.removeIcon(0);
+        assertNull(statusBarIconList.getIcon(0)); // icon not set
+    }
+
+    @Test
+    public void testGetViewIndex() {
+        StatusBarIconList statusBarIconList = new StatusBarIconList(STATUS_BAR_SLOTS);
+        StatusBarIcon sbIcon = mock(StatusBarIcon.class);
+        statusBarIconList.setIcon(2, sbIcon);
+        assertEquals(0, statusBarIconList.getViewIndex(2)); // Icon for item 2 is 0th child view.
+        statusBarIconList.setIcon(0, sbIcon);
+        assertEquals(0, statusBarIconList.getViewIndex(0)); // Icon for item 0 is 0th child view,
+        assertEquals(1, statusBarIconList.getViewIndex(2)); // and item 2 is now 1st child view.
+    }
+
+}