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/*
* 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 com.android.inputmethod.latin.common.CollectionUtils;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Tests for {@link CollectionUtils}.
*/
@SmallTest
public class CollectionUtilsTests extends AndroidTestCase {
/**
* Tests that {@link CollectionUtils#arrayAsList(Object[],int,int)} fails as expected
* with some invalid inputs.
*/
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.
*/
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.
*/
public void testIsNullOrEmpty() {
assertTrue(CollectionUtils.isNullOrEmpty((List) null));
assertTrue(CollectionUtils.isNullOrEmpty((Map) null));
assertTrue(CollectionUtils.isNullOrEmpty(new ArrayList()));
assertTrue(CollectionUtils.isNullOrEmpty(new HashMap()));
assertTrue(CollectionUtils.isNullOrEmpty(Collections.EMPTY_LIST));
assertTrue(CollectionUtils.isNullOrEmpty(Collections.EMPTY_MAP));
assertFalse(CollectionUtils.isNullOrEmpty(Collections.singletonList("Not empty")));
assertFalse(CollectionUtils.isNullOrEmpty(Collections.singletonMap("Not", "empty")));
}
}
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