| /* |
| * 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 static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.fail; |
| |
| import com.android.inputmethod.latin.common.CollectionUtils; |
| |
| import android.support.test.filters.SmallTest; |
| import android.support.test.runner.AndroidJUnit4; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| |
| /** |
| * Tests for {@link CollectionUtils}. |
| */ |
| @SmallTest |
| @RunWith(AndroidJUnit4.class) |
| public class CollectionUtilsTests { |
| /** |
| * Tests that {@link CollectionUtils#arrayAsList(Object[],int,int)} fails as expected |
| * with some invalid inputs. |
| */ |
| @Test |
| public void testArrayAsListFailure() { |
| final String[] array = { "0", "1" }; |
| // Negative start |
| try { |
| CollectionUtils.arrayAsList(array, -1, 1); |
| fail("Failed to catch start < 0"); |
| } catch (final IllegalArgumentException e) { |
| assertEquals("Invalid start: -1 end: 1 with array.length: 2", e.getMessage()); |
| } |
| // start > end |
| try { |
| CollectionUtils.arrayAsList(array, 1, -1); |
| fail("Failed to catch start > end"); |
| } catch (final IllegalArgumentException e) { |
| assertEquals("Invalid start: 1 end: -1 with array.length: 2", e.getMessage()); |
| } |
| // end > array.length |
| try { |
| CollectionUtils.arrayAsList(array, 1, 3); |
| fail("Failed to catch end > array.length"); |
| } catch (final IllegalArgumentException e) { |
| assertEquals("Invalid start: 1 end: 3 with array.length: 2", e.getMessage()); |
| } |
| } |
| |
| /** |
| * Tests that {@link CollectionUtils#arrayAsList(Object[],int,int)} gives the expected |
| * results for a few valid inputs. |
| */ |
| @Test |
| public void testArrayAsList() { |
| final ArrayList<String> empty = new ArrayList<>(); |
| assertEquals(empty, CollectionUtils.arrayAsList(new String[] {}, 0, 0)); |
| final String[] array = { "0", "1", "2", "3", "4" }; |
| assertEquals(empty, CollectionUtils.arrayAsList(array, 0, 0)); |
| assertEquals(empty, CollectionUtils.arrayAsList(array, 1, 1)); |
| assertEquals(empty, CollectionUtils.arrayAsList(array, array.length, array.length)); |
| final ArrayList<String> expected123 = new ArrayList<>(Arrays.asList("1", "2", "3")); |
| assertEquals(expected123, CollectionUtils.arrayAsList(array, 1, 4)); |
| } |
| |
| /** |
| * Tests that {@link CollectionUtils#isNullOrEmpty(java.util.Collection)} gives the expected |
| * results for a few cases. |
| */ |
| @Test |
| public void testIsNullOrEmpty() { |
| assertTrue(CollectionUtils.isNullOrEmpty((List<String>) null)); |
| assertTrue(CollectionUtils.isNullOrEmpty((Map<String, String>) null)); |
| assertTrue(CollectionUtils.isNullOrEmpty(new ArrayList<String>())); |
| assertTrue(CollectionUtils.isNullOrEmpty(new HashMap<String, String>())); |
| assertFalse(CollectionUtils.isNullOrEmpty(Collections.singletonList("Not empty"))); |
| assertFalse(CollectionUtils.isNullOrEmpty(Collections.singletonMap("Not", "empty"))); |
| } |
| } |