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/*
* Copyright (C) 2007 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.primitives;
import static com.google.common.truth.Truth.assertThat;
import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;
import com.google.common.testing.NullPointerTester;
import java.util.Set;
import junit.framework.TestCase;
/**
* Unit test for {@link Primitives}.
*
* @author Kevin Bourrillion
*/
@GwtCompatible(emulated = true)
public class PrimitivesTest extends TestCase {
public void testIsWrapperType() {
assertThat(Primitives.isWrapperType(Void.class)).isTrue();
assertThat(Primitives.isWrapperType(void.class)).isFalse();
}
public void testWrap() {
assertThat(Primitives.wrap(int.class)).isSameInstanceAs(Integer.class);
assertThat(Primitives.wrap(Integer.class)).isSameInstanceAs(Integer.class);
assertThat(Primitives.wrap(String.class)).isSameInstanceAs(String.class);
}
public void testUnwrap() {
assertThat(Primitives.unwrap(Integer.class)).isSameInstanceAs(int.class);
assertThat(Primitives.unwrap(int.class)).isSameInstanceAs(int.class);
assertThat(Primitives.unwrap(String.class)).isSameInstanceAs(String.class);
}
public void testAllPrimitiveTypes() {
Set<Class<?>> primitives = Primitives.allPrimitiveTypes();
assertThat(primitives)
.containsExactly(
boolean.class,
byte.class,
char.class,
double.class,
float.class,
int.class,
long.class,
short.class,
void.class);
try {
primitives.remove(boolean.class);
fail();
} catch (UnsupportedOperationException expected) {
}
}
public void testAllWrapperTypes() {
Set<Class<?>> wrappers = Primitives.allWrapperTypes();
assertThat(wrappers)
.containsExactly(
Boolean.class,
Byte.class,
Character.class,
Double.class,
Float.class,
Integer.class,
Long.class,
Short.class,
Void.class);
try {
wrappers.remove(Boolean.class);
fail();
} catch (UnsupportedOperationException expected) {
}
}
@GwtIncompatible
@J2ktIncompatible
public void testNullPointerExceptions() {
NullPointerTester tester = new NullPointerTester();
tester.testAllPublicStaticMethods(Primitives.class);
}
}
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