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/*
* Copyright (C) 2018 Google, Inc.
*
* 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.escapevelocity;
import static com.google.common.truth.Truth.assertThat;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.primitives.Primitives;
import com.google.common.truth.Expect;
import com.google.escapevelocity.ReferenceNode.MethodReferenceNode;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Tests for {@link ReferenceNode}.
*
* @author emcmanus@google.com (Éamonn McManus)
*/
@RunWith(JUnit4.class)
public class ReferenceNodeTest {
@Rule public Expect expect = Expect.create();
// This is the exhaustive list from
// https://docs.oracle.com/javase/specs/jls/se8/html/jls-5.html#jls-5.1.2.
// We put the "from" type first for consistency with that list, even though that is inconsistent
// with our method order (which is itself consistent with assignment, "to" on the left).
private static final ImmutableSet<ImmutableList<Class<?>>> ASSIGNMENT_COMPATIBLE =
makeAssignmentCompatibleSet();
private static ImmutableSet<ImmutableList<Class<?>>> makeAssignmentCompatibleSet() {
Class<?>[][] pairs = {
{byte.class, short.class},
{byte.class, int.class},
{byte.class, long.class},
{byte.class, float.class},
{byte.class, double.class},
{short.class, int.class},
{short.class, long.class},
{short.class, float.class},
{short.class, double.class},
{char.class, int.class},
{char.class, long.class},
{char.class, float.class},
{char.class, double.class},
{int.class, long.class},
{int.class, float.class},
{int.class, double.class},
{long.class, float.class},
{long.class, double.class},
{float.class, double.class},
};
ImmutableSet.Builder<ImmutableList<Class<?>>> builder = ImmutableSet.builder();
for (Class<?>[] pair : pairs) {
builder.add(ImmutableList.copyOf(pair));
}
return builder.build();
}
@Test
public void testPrimitiveTypeIsAssignmentCompatible() {
for (Class<?> from : Primitives.allPrimitiveTypes()) {
for (Class<?> to : Primitives.allPrimitiveTypes()) {
boolean expected =
(from == to || ASSIGNMENT_COMPATIBLE.contains(ImmutableList.of(from, to)));
boolean actual =
MethodReferenceNode.primitiveTypeIsAssignmentCompatible(to, from);
expect
.withMessage(from + " assignable to " + to)
.that(actual).isEqualTo(expected);
}
}
}
@Test
public void testCompatibleArgs() {
assertThat(MethodReferenceNode.compatibleArgs(
new Class<?>[]{int.class}, ImmutableList.of((Object) 5))).isTrue();
}
}
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