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/*
* Copyright 2020 Google LLC
*
* 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.auto.value.extension.serializable.serializer.utils;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Iterables;
import com.google.common.reflect.Reflection;
import com.google.testing.compile.CompilationRule;
import java.lang.reflect.InvocationHandler;
import java.util.Arrays;
import javax.annotation.processing.Messager;
import javax.annotation.processing.ProcessingEnvironment;
import javax.lang.model.element.TypeElement;
import javax.lang.model.type.DeclaredType;
import javax.lang.model.type.TypeMirror;
import javax.lang.model.util.Elements;
import javax.lang.model.util.Types;
import org.junit.Before;
import org.junit.Rule;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
@RunWith(JUnit4.class)
public abstract class CompilationAbstractTest {
@Rule public final CompilationRule compilationRule = new CompilationRule();
protected ProcessingEnvironment mockProcessingEnvironment = mockProcessingEnvironment();
protected Messager mockMessager = mockMessager();
protected Types typeUtils;
protected Elements elementUtils;
private ProcessingEnvironment mockProcessingEnvironment() {
InvocationHandler handler = (proxy, method, args) -> {
switch (method.getName()) {
case "getTypeUtils":
return typeUtils;
case "getElementUtils":
return elementUtils;
case "getMessager":
return mockMessager;
case "getOptions":
return ImmutableMap.of();
case "toString":
return "MockProcessingEnvironment";
default:
throw new IllegalArgumentException("Unsupported method: " + method);
}
};
return Reflection.newProxy(ProcessingEnvironment.class, handler);
}
private Messager mockMessager() {
InvocationHandler handler = (proxy, method, args) -> null;
return Reflection.newProxy(Messager.class, handler);
}
@Before
public final void setUp() {
typeUtils = compilationRule.getTypes();
elementUtils = compilationRule.getElements();
}
protected TypeElement typeElementOf(Class<?> c) {
return elementUtils.getTypeElement(c.getCanonicalName());
}
protected TypeMirror typeMirrorOf(Class<?> c) {
return typeElementOf(c).asType();
}
protected DeclaredType declaredTypeOf(Class<?> enclosingClass, Class<?> containedClass) {
return typeUtils.getDeclaredType(typeElementOf(enclosingClass), typeMirrorOf(containedClass));
}
protected DeclaredType declaredTypeOf(Class<?> enclosingClass, Class<?>... classArgs) {
return typeUtils.getDeclaredType(
typeElementOf(enclosingClass),
Iterables.toArray(
Arrays.stream(classArgs)
.map(this::typeMirrorOf)
.collect(ImmutableList.toImmutableList()),
TypeMirror.class));
}
}
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