1 /* 2 * Copyright (C) 2018 Google, Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.google.escapevelocity; 17 18 import static com.google.common.truth.Truth.assertThat; 19 20 import com.google.common.collect.ImmutableList; 21 import com.google.common.collect.ImmutableSet; 22 import com.google.common.primitives.Primitives; 23 import com.google.common.truth.Expect; 24 import com.google.escapevelocity.ReferenceNode.MethodReferenceNode; 25 import org.junit.Rule; 26 import org.junit.Test; 27 import org.junit.runner.RunWith; 28 import org.junit.runners.JUnit4; 29 30 /** 31 * Tests for {@link ReferenceNode}. 32 * 33 * @author emcmanus@google.com (Éamonn McManus) 34 */ 35 @RunWith(JUnit4.class) 36 public class ReferenceNodeTest { 37 @Rule public Expect expect = Expect.create(); 38 39 // This is the exhaustive list from 40 // https://docs.oracle.com/javase/specs/jls/se8/html/jls-5.html#jls-5.1.2. 41 // We put the "from" type first for consistency with that list, even though that is inconsistent 42 // with our method order (which is itself consistent with assignment, "to" on the left). 43 private static final ImmutableSet<ImmutableList<Class<?>>> ASSIGNMENT_COMPATIBLE = 44 makeAssignmentCompatibleSet(); makeAssignmentCompatibleSet()45 private static ImmutableSet<ImmutableList<Class<?>>> makeAssignmentCompatibleSet() { 46 Class<?>[][] pairs = { 47 {byte.class, short.class}, 48 {byte.class, int.class}, 49 {byte.class, long.class}, 50 {byte.class, float.class}, 51 {byte.class, double.class}, 52 {short.class, int.class}, 53 {short.class, long.class}, 54 {short.class, float.class}, 55 {short.class, double.class}, 56 {char.class, int.class}, 57 {char.class, long.class}, 58 {char.class, float.class}, 59 {char.class, double.class}, 60 {int.class, long.class}, 61 {int.class, float.class}, 62 {int.class, double.class}, 63 {long.class, float.class}, 64 {long.class, double.class}, 65 {float.class, double.class}, 66 }; 67 ImmutableSet.Builder<ImmutableList<Class<?>>> builder = ImmutableSet.builder(); 68 for (Class<?>[] pair : pairs) { 69 builder.add(ImmutableList.copyOf(pair)); 70 } 71 return builder.build(); 72 } 73 74 @Test testPrimitiveTypeIsAssignmentCompatible()75 public void testPrimitiveTypeIsAssignmentCompatible() { 76 for (Class<?> from : Primitives.allPrimitiveTypes()) { 77 for (Class<?> to : Primitives.allPrimitiveTypes()) { 78 boolean expected = 79 (from == to || ASSIGNMENT_COMPATIBLE.contains(ImmutableList.of(from, to))); 80 boolean actual = 81 MethodReferenceNode.primitiveTypeIsAssignmentCompatible(to, from); 82 expect 83 .withMessage(from + " assignable to " + to) 84 .that(actual).isEqualTo(expected); 85 } 86 } 87 } 88 89 @Test testCompatibleArgs()90 public void testCompatibleArgs() { 91 assertThat(MethodReferenceNode.compatibleArgs( 92 new Class<?>[]{int.class}, ImmutableList.of((Object) 5))).isTrue(); 93 } 94 } 95