105 lines
3.9 KiB
Java
105 lines
3.9 KiB
Java
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.inputmethod.latin.utils;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertFalse;
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import static org.junit.Assert.assertTrue;
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import static org.junit.Assert.fail;
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import androidx.test.filters.SmallTest;
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import androidx.test.runner.AndroidJUnit4;
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import com.android.inputmethod.latin.common.CollectionUtils;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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/**
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* Tests for {@link CollectionUtils}.
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*/
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@SmallTest
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@RunWith(AndroidJUnit4.class)
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public class CollectionUtilsTests {
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/**
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* Tests that {@link CollectionUtils#arrayAsList(Object[],int,int)} fails as expected
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* with some invalid inputs.
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*/
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@Test
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public void testArrayAsListFailure() {
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final String[] array = { "0", "1" };
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// Negative start
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try {
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CollectionUtils.arrayAsList(array, -1, 1);
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fail("Failed to catch start < 0");
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} catch (final IllegalArgumentException e) {
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assertEquals("Invalid start: -1 end: 1 with array.length: 2", e.getMessage());
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}
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// start > end
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try {
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CollectionUtils.arrayAsList(array, 1, -1);
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fail("Failed to catch start > end");
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} catch (final IllegalArgumentException e) {
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assertEquals("Invalid start: 1 end: -1 with array.length: 2", e.getMessage());
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}
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// end > array.length
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try {
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CollectionUtils.arrayAsList(array, 1, 3);
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fail("Failed to catch end > array.length");
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} catch (final IllegalArgumentException e) {
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assertEquals("Invalid start: 1 end: 3 with array.length: 2", e.getMessage());
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}
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}
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/**
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* Tests that {@link CollectionUtils#arrayAsList(Object[],int,int)} gives the expected
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* results for a few valid inputs.
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*/
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@Test
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public void testArrayAsList() {
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final ArrayList<String> empty = new ArrayList<>();
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assertEquals(empty, CollectionUtils.arrayAsList(new String[] {}, 0, 0));
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final String[] array = { "0", "1", "2", "3", "4" };
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assertEquals(empty, CollectionUtils.arrayAsList(array, 0, 0));
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assertEquals(empty, CollectionUtils.arrayAsList(array, 1, 1));
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assertEquals(empty, CollectionUtils.arrayAsList(array, array.length, array.length));
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final ArrayList<String> expected123 = new ArrayList<>(Arrays.asList("1", "2", "3"));
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assertEquals(expected123, CollectionUtils.arrayAsList(array, 1, 4));
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}
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/**
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* Tests that {@link CollectionUtils#isNullOrEmpty(java.util.Collection)} gives the expected
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* results for a few cases.
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*/
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@Test
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public void testIsNullOrEmpty() {
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assertTrue(CollectionUtils.isNullOrEmpty((List<String>) null));
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assertTrue(CollectionUtils.isNullOrEmpty((Map<String, String>) null));
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assertTrue(CollectionUtils.isNullOrEmpty(new ArrayList<String>()));
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assertTrue(CollectionUtils.isNullOrEmpty(new HashMap<String, String>()));
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assertFalse(CollectionUtils.isNullOrEmpty(Collections.singletonList("Not empty")));
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assertFalse(CollectionUtils.isNullOrEmpty(Collections.singletonMap("Not", "empty")));
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}
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}
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