/*
 * Copyright (C) 2015 Red Hat, Inc. and/or its affiliates.
 *
 * 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 org.jboss.errai.codegen.test.meta.java;

import static org.jboss.errai.codegen.util.Stmt.nestedCall;
import static org.jboss.errai.codegen.util.Stmt.newObject;
import static org.junit.Assert.assertEquals;

import org.jboss.errai.codegen.builder.ContextualStatementBuilder;
import org.jboss.errai.codegen.meta.MetaClass;
import org.jboss.errai.codegen.meta.MetaMethod;
import org.jboss.errai.codegen.meta.impl.java.JavaReflectionClass;
import org.jboss.errai.codegen.test.meta.AbstractMetaClassTest;
import org.jboss.errai.codegen.test.model.PortableIntegerParameterDefinition;
import org.junit.Test;

public class JavaReflectionMetaClassTest extends AbstractMetaClassTest {

  @Override
  protected MetaClass getMetaClassImpl(Class<?> javaClass) {
    return JavaReflectionClass.newInstance(javaClass);
  }

  @Override
  protected Class<? extends MetaClass> getTypeOfMetaClassBeingTested() {
    return JavaReflectionClass.class;
  }

  /**
   * This reproduces a bug found in the JavaReflectionClass.
   * PortableIntegerParameterDefinition overrides a method with a generic return
   * type (getValue). Class.getDeclaredMethods returns a bridge method with a
   * return type of the upper type bound (in this case, Serializable). This
   * resulted in JavaReflectionClass.getMethods() returning a MetaMethod for
   * bridge method with the wrong return type, leading to seemingly mysterious
   * codegen errors.
   */
  @Test
  public void testMethodReturnTypeIsSpecializedTypeAndNotFromBridgeMethod() throws Exception {
    final MetaClass mc = getMetaClassImpl(PortableIntegerParameterDefinition.class);
    final MetaMethod method = mc.getBestMatchingMethod("getValue", new MetaClass[0]);
    final ContextualStatementBuilder invokeStmt = nestedCall(newObject(mc)).invoke("getValue");
    // Force statement to load return type
    invokeStmt.toJavaString();
    final MetaClass stmtReturnType = invokeStmt.getType();

    final MetaClass expected = getMetaClassImpl(java.lang.Integer.class);
    assertEquals(expected, method.getReturnType());
    assertEquals(expected, stmtReturnType);
  }

}