1 files changed, 55 insertions, 0 deletions
diff --git a/tests/src/com/android/inputmethod/latin/utils/CollectionUtilsTests.java b/tests/src/com/android/inputmethod/latin/utils/CollectionUtilsTests.java
new file mode 100644
index 000000000..76e28288f
--- /dev/null
+++ b/tests/src/com/android/inputmethod/latin/utils/CollectionUtilsTests.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2014 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.inputmethod.latin.utils;
+
+import android.test.AndroidTestCase;
+import android.test.suitebuilder.annotation.SmallTest;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+
+/**
+ * Tests for {@link CollectionUtils}.
+ */
+@SmallTest
+public class CollectionUtilsTests extends AndroidTestCase {
+    /**
+     * Tests that {@link CollectionUtils#arrayAsList(E[],int,int)} gives the expected
+     * results for a few valid inputs.
+     */
+    public void testArrayAsList() {
+        final String[] array = { "0", "1", "2", "3", "4" };
+        final ArrayList<String> empty = new ArrayList<>();
+        assertEquals(empty, CollectionUtils.arrayAsList(array, 0, 0));
+        assertEquals(empty, CollectionUtils.arrayAsList(array, 1, 1));
+        final ArrayList<String> expected123 = new ArrayList<>(Arrays.asList("1", "2", "3"));
+        assertEquals(expected123, CollectionUtils.arrayAsList(array, 1, 4));
+    }
+
+    /**
+     * Tests that {@link CollectionUtils#isEmpty(java.util.Collection)} gives the expected
+     * results for a few cases.
+     */
+    public void testIsNullOrEmpty() {
+        assertTrue(CollectionUtils.isNullOrEmpty(null));
+        assertTrue(CollectionUtils.isNullOrEmpty(new ArrayList()));
+        assertTrue(CollectionUtils.isNullOrEmpty(Collections.EMPTY_SET));
+        assertFalse(CollectionUtils.isNullOrEmpty(Collections.singleton("Not empty")));
+    }
+
+}