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/*
* Copyright (C) 2008 The Guava Authors
*
* 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.google.common.collect.testing;
import static com.google.common.collect.testing.Helpers.NullsBeforeB;
import static com.google.common.collect.testing.Helpers.testComparator;
import com.google.common.annotations.GwtCompatible;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import junit.framework.AssertionFailedError;
import junit.framework.TestCase;
/**
* Unit test for {@link Helpers}.
*
* @author Chris Povirk
*/
@GwtCompatible
public class HelpersTest extends TestCase {
public void testNullsBeforeB() {
testComparator(NullsBeforeB.INSTANCE, "a", "azzzzzz", null, "b", "c");
}
public void testIsEmpty_iterable() {
List<Object> list = new ArrayList<>();
Helpers.assertEmpty(list);
Helpers.assertEmpty(
new Iterable<Object>() {
@Override
public Iterator<Object> iterator() {
return Collections.emptyList().iterator();
}
});
list.add("a");
try {
Helpers.assertEmpty(list);
throw new Error();
} catch (AssertionFailedError expected) {
}
try {
Helpers.assertEmpty(
new Iterable<String>() {
@Override
public Iterator<String> iterator() {
return Collections.singleton("a").iterator();
}
});
throw new Error();
} catch (AssertionFailedError expected) {
}
}
public void testIsEmpty_map() {
Map<Object, Object> map = new HashMap<>();
Helpers.assertEmpty(map);
map.put("a", "b");
try {
Helpers.assertEmpty(map);
throw new Error();
} catch (AssertionFailedError expected) {
}
}
public void testAssertEqualInOrder() {
List<?> list = Arrays.asList("a", "b", "c");
Helpers.assertEqualInOrder(list, list);
List<?> fewer = Arrays.asList("a", "b");
try {
Helpers.assertEqualInOrder(list, fewer);
throw new Error();
} catch (AssertionFailedError expected) {
}
try {
Helpers.assertEqualInOrder(fewer, list);
throw new Error();
} catch (AssertionFailedError expected) {
}
List<?> differentOrder = Arrays.asList("a", "c", "b");
try {
Helpers.assertEqualInOrder(list, differentOrder);
throw new Error();
} catch (AssertionFailedError expected) {
}
List<?> differentContents = Arrays.asList("a", "b", "C");
try {
Helpers.assertEqualInOrder(list, differentContents);
throw new Error();
} catch (AssertionFailedError expected) {
}
}
public void testAssertContentsInOrder() {
List<?> list = Arrays.asList("a", "b", "c");
Helpers.assertContentsInOrder(list, "a", "b", "c");
try {
Helpers.assertContentsInOrder(list, "a", "b");
throw new Error();
} catch (AssertionFailedError expected) {
}
try {
Helpers.assertContentsInOrder(list, "a", "b", "c", "d");
throw new Error();
} catch (AssertionFailedError expected) {
}
try {
Helpers.assertContentsInOrder(list, "a", "c", "b");
throw new Error();
} catch (AssertionFailedError expected) {
}
try {
Helpers.assertContentsInOrder(list, "a", "B", "c");
throw new Error();
} catch (AssertionFailedError expected) {
}
}
public void testAssertContains() {
List<?> list = Arrays.asList("a", "b");
Helpers.assertContains(list, "a");
Helpers.assertContains(list, "b");
try {
Helpers.assertContains(list, "c");
throw new Error();
} catch (AssertionFailedError expected) {
}
}
public void testAssertContainsAllOf() {
List<?> list = Arrays.asList("a", "a", "b", "c");
Helpers.assertContainsAllOf(list, "a");
Helpers.assertContainsAllOf(list, "a", "a");
Helpers.assertContainsAllOf(list, "a", "b", "c");
Helpers.assertContainsAllOf(list, "a", "b", "c", "a");
try {
Helpers.assertContainsAllOf(list, "d");
throw new Error();
} catch (AssertionFailedError expected) {
}
try {
Helpers.assertContainsAllOf(list, "a", "b", "c", "d");
throw new Error();
} catch (AssertionFailedError expected) {
}
try {
Helpers.assertContainsAllOf(list, "a", "a", "a");
throw new Error();
} catch (AssertionFailedError expected) {
}
}
}
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