/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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
 *
 *    https://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.grails.datastore.gorm.async.transform

import java.lang.reflect.Method

import groovy.transform.Generated
import org.codehaus.groovy.ast.ClassNode

import spock.lang.Specification

import grails.async.Promise

/**
 * Created by graemerocher on 01/07/16.
 */
class DelegateAsyncSpec extends Specification {

    void 'test DelegateAsync with parameterized return types'() {

        given: 'a class with parameterized return types'
        def cls = new GroovyClassLoader().parseClass('''
            import org.grails.datastore.gorm.async.transform.*
            class Bar<D> {
                @DelegateAsync Foo<D> foo
            }
            
            interface Foo<D> {
                public <T> T  withTransaction(Closure<T> callable)
            }
        ''')

        expect: 'the method is retrieved'
        new ClassNode(cls).methods

        def method = cls.getMethod('withTransaction', Closure)
        Promise.isAssignableFrom(method.returnType)

        and: 'marked as Generated'
        method.isAnnotationPresent(Generated)
    }
}
