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Java example source code file (TypeResolverTest.java)
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The TypeResolverTest.java Java example source code
/*
* Copyright (C) 2012 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.reflect;
import junit.framework.TestCase;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.List;
import java.util.Map;
/**
* Unit tests of {@link TypeResolver}.
*
* @author Ben Yu
*/
@AndroidIncompatible // lots of failures, possibly some related to bad equals() implementations?
public class TypeResolverTest extends TestCase {
public void testWhere_noMapping() {
Type t = aTypeVariable();
assertEquals(t, new TypeResolver().resolveType(t));
}
public void testWhere_typeVariableMapping() {
Type t = aTypeVariable();
assertEquals(String.class, new TypeResolver().where(t, String.class).resolveType(t));
}
public <T> void testWhere_indirectMapping() {
Type t1 = new TypeCapture<T>() {}.capture();
Type t2 = aTypeVariable();
assertEquals(String.class,
new TypeResolver().where(t1, t2).where(t2, String.class).resolveType(t1));
}
public void testWhere_typeVariableSelfMapping() {
TypeResolver resolver = new TypeResolver();
Type t = aTypeVariable();
assertEquals(t, resolver.where(t, t).resolveType(t));
}
public <T> void testWhere_parameterizedSelfMapping() {
TypeResolver resolver = new TypeResolver();
Type t = new TypeCapture<List() {}.capture();
assertEquals(t, resolver.where(t, t).resolveType(t));
}
public <T> void testWhere_genericArraySelfMapping() {
TypeResolver resolver = new TypeResolver();
Type t = new TypeCapture<T[]>() {}.capture();
assertEquals(t, resolver.where(t, t).resolveType(t));
}
public <T> void testWhere_rawClassSelfMapping() {
TypeResolver resolver = new TypeResolver();
assertEquals(String.class,
resolver.where(String.class, String.class).resolveType(String.class));
}
public <T> void testWhere_wildcardSelfMapping() {
TypeResolver resolver = new TypeResolver();
Type t = aWildcardType();
assertEquals(t, resolver.where(t, t).resolveType(t));
}
public <T> void testWhere_duplicateMapping() {
Type t = aTypeVariable();
TypeResolver resolver = new TypeResolver().where(t, String.class);
try {
resolver.where(t, String.class);
fail();
} catch (IllegalArgumentException expected) {}
}
public <T1, T2 extends List void testWhere_recursiveMapping() {
Type t1 = new TypeCapture<T1>() {}.capture();
Type t2 = new TypeCapture<T2>() {}.capture();
assertEquals(t2, new TypeResolver().where(t1, t2).resolveType(t1));
}
public <T> void testWhere_genericArrayMapping() {
Type t = new TypeCapture<T>() {}.capture();
assertEquals(String.class, new TypeResolver()
.where(new TypeCapture<T[]>() {}.capture(), String[].class)
.resolveType(t));
}
public <T> void testWhere_primitiveArrayMapping() {
Type t = new TypeCapture<T>() {}.capture();
assertEquals(int.class,
new TypeResolver().where(new TypeCapture<T[]>() {}.capture(), int[].class).resolveType(t));
}
public <T> void testWhere_parameterizedTypeMapping() {
Type t = new TypeCapture<T>() {}.capture();
assertEquals(String.class, new TypeResolver()
.where(new TypeCapture<List() {}.capture(),
new TypeCapture<List() {}.capture())
.resolveType(t));
assertEquals(Types.subtypeOf(String.class), new TypeResolver()
.where(new TypeCapture<List() {}.capture(),
new TypeCapture<List() {}.capture())
.resolveType(t));
assertEquals(Types.supertypeOf(String.class), new TypeResolver()
.where(new TypeCapture<List() {}.capture(),
new TypeCapture<List() {}.capture())
.resolveType(t));
}
public <T> void testWhere_wildcardTypeMapping() {
Type t = new TypeCapture<T>() {}.capture();
assertEquals(String.class, new TypeResolver()
.where(new TypeCapture<List() {}.capture(),
new TypeCapture<List() {}.capture())
.resolveType(t));
assertEquals(String.class, new TypeResolver()
.where(new TypeCapture<List() {}.capture(),
new TypeCapture<List() {}.capture())
.resolveType(t));
}
public <T> void testWhere_incompatibleGenericArrayMapping() {
try {
new TypeResolver().where(new TypeCapture<T[]>() {}.capture(), String.class);
fail();
} catch (IllegalArgumentException expected) {}
}
public <T> void testWhere_incompatibleParameterizedTypeMapping() {
try {
new TypeResolver().where(new TypeCapture<Iterable() {}.capture(), List.class);
fail();
} catch (IllegalArgumentException expected) {}
}
public <T> void testWhere_impossibleParameterizedTypeMapping() {
try {
new TypeResolver().where(
new TypeCapture<List() {}.capture(),
new TypeCapture<Map() {}.capture());
fail();
} catch (IllegalArgumentException expected) {}
}
public <T> void testWhere_incompatibleWildcardUpperBound() {
try {
new TypeResolver().where(
new TypeCapture<List() {}.capture(),
new TypeCapture<List() {}.capture());
fail();
} catch (IllegalArgumentException expected) {}
}
public <T> void testWhere_incompatibleWildcardLowerBound() {
try {
new TypeResolver().where(
new TypeCapture<List() {}.capture(),
new TypeCapture<List() {}.capture());
fail();
} catch (IllegalArgumentException expected) {}
}
public <T> void testWhere_incompatibleWildcardBounds() {
try {
new TypeResolver().where(
new TypeCapture<List() {}.capture(),
new TypeCapture<List() {}.capture());
fail();
} catch (IllegalArgumentException expected) {}
}
public <T> void testWhere_wrongOrder() {
try {
new TypeResolver().where(String.class, aTypeVariable());
fail();
} catch (IllegalArgumentException expected) {}
}
public <T> void testWhere_mapFromConcreteParameterizedType() {
try {
new TypeResolver().where(new TypeCapture<List() {}.capture(), aTypeVariable());
fail();
} catch (IllegalArgumentException expected) {}
}
public <T> void testWhere_mapFromConcreteGenericArrayType() {
try {
new TypeResolver().where(new TypeCapture<List() {}.capture(), aTypeVariable());
fail();
} catch (IllegalArgumentException expected) {}
}
public <K, V> void testWhere_actualArgHasWildcard() {
TypeResolver resolver = new TypeResolver().where(
new TypeCapture<Iterable
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