📰 Add tests for Tile and TileGroup

chrome/android/junit/src/org/chromium/chrome/browser/suggestions/TileTest.java

Index: chrome/android/junit/src/org/chromium/chrome/browser/suggestions/TileTest.java
diff --git a/chrome/android/junit/src/org/chromium/chrome/browser/suggestions/TileTest.java b/chrome/android/junit/src/org/chromium/chrome/browser/suggestions/TileTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..08ce230936a10b6ce96dacade9f5460a6dd9a4bc
--- /dev/null
+++ b/chrome/android/junit/src/org/chromium/chrome/browser/suggestions/TileTest.java
@@ -0,0 +1,114 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.suggestions;
+
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
+
+import android.graphics.drawable.Drawable;
+import android.graphics.drawable.GradientDrawable;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.annotation.Config;
+
+import org.chromium.chrome.browser.ntp.MostVisitedTileType;
+import org.chromium.chrome.browser.ntp.NTPTileSource;
+import org.chromium.testing.local.LocalRobolectricTestRunner;
+
+/**
+ * Unit tests for {@link Tile}.
+ */
+@RunWith(LocalRobolectricTestRunner.class)
+@Config(manifest = Config.NONE)
+public class TileTest {
+    private static final String[] URLS = {"https://www.google.com", "https://tellmedadjokes.com"};
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+    }
+
+    @Test
+    public void testImportDataWithNewTitle() {
+        Tile tile = new Tile("title", URLS[0], "", 0, NTPTileSource.TOP_SITES);
+        Tile oldTile = new Tile("oldTitle", URLS[0], "", 0, NTPTileSource.TOP_SITES);
+
+        // importData should report the change, and the new tile should keep its own data.
+        assertTrue(tile.importData(oldTile));
+        assertThat(tile.getTitle(), equalTo("title"));
+    }
+
+    @Test(expected = AssertionError.class)
+    public void testImportDataWithNewUrl() {
+        Tile tile = new Tile("title", URLS[0], "", 0, NTPTileSource.TOP_SITES);
+        Tile oldTile = new Tile("title", URLS[1], "", 0, NTPTileSource.TOP_SITES);
+
+        // Importing from a tile associated to a different URL should crash, as bug detection
+        // measure.
+        tile.importData(oldTile);
+    }
+
+    @Test
+    public void testImportDataWithNewWhitelistIconPath() {
+        Tile tile = new Tile("title", URLS[0], "", 0, NTPTileSource.TOP_SITES);
+        Tile oldTile = new Tile("title", URLS[0], "foobar", 0, NTPTileSource.TOP_SITES);
+
+        // importData should report the change, and the new tile should keep its own data.
+        assertTrue(tile.importData(oldTile));
+        assertThat(tile.getWhitelistIconPath(), equalTo(""));
+    }
+
+    @Test
+    public void testImportDataWithNewIndex() {
+        Tile tile = new Tile("title", URLS[0], "", 0, NTPTileSource.TOP_SITES);
+        Tile oldTile = new Tile("title", URLS[0], "", 1, NTPTileSource.TOP_SITES);
+
+        // importData should report the change, and the new tile should keep its own data.
+        assertTrue(tile.importData(oldTile));
+        assertThat(tile.getIndex(), equalTo(0));
+    }
+
+    @Test
+    public void testImportDataWithNewSource() {
+        Tile tile = new Tile("title", URLS[0], "", 0, NTPTileSource.TOP_SITES);
+        Tile oldTile = new Tile("title", URLS[0], "", 0, NTPTileSource.POPULAR);
+
+        // importData should not report the change since it has no visible impact. The new tile
+        // still keeps its own data.
+        assertFalse(tile.importData(oldTile));
+        assertThat(tile.getSource(), equalTo(NTPTileSource.TOP_SITES));
+    }
+
+    @Test
+    public void testTileImportWithSameData() {
+        Tile tile = new Tile("title", URLS[0], "", 0, NTPTileSource.TOP_SITES);
+        Tile oldTile = new Tile("title", URLS[0], "", 0, NTPTileSource.TOP_SITES);
+
+        // No change should be reported
+        assertFalse(tile.importData(oldTile));
+    }
+
+    @Test
+    public void testTileImportWithTransientData() {
+        Tile tile = new Tile("title", URLS[0], "", 0, NTPTileSource.TOP_SITES);
+
+        Drawable dummyDrawable = new GradientDrawable();
+        Tile oldTile = new Tile("title", URLS[0], "", 0, NTPTileSource.TOP_SITES);
+        oldTile.setOfflinePageOfflineId(42L);
+        oldTile.setIcon(dummyDrawable);
+        oldTile.setType(MostVisitedTileType.ICON_REAL);
+
+        // Old transient data should be copied over to the new tile without flagging the change.
+        assertFalse(tile.importData(oldTile));
+        assertThat(tile.getOfflinePageOfflineId(), equalTo(42L));
+        assertThat(tile.getIcon(), equalTo(dummyDrawable));
+        assertThat(tile.getType(), equalTo(MostVisitedTileType.ICON_REAL));
+    }
+}