src/test/groovy/bugs/Groovy8864Bug.groovy

/*
 *  Licensed to the Apache Software Foundation (ASF) under one
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 *  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
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
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 *  "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 groovy.bugs

import groovy.test.GroovyTestCase

class Groovy8864Bug extends GroovyTestCase {
    void testGenericsAppliedToStaticMethodsForTraits() {
        assertScript '''
            trait Foo<T> {
                static T INSTANCE
                static T get(T arg) { 
                    null
               }
            }

            class Bar implements Foo<Bar> {}
            assert Bar.getMethod("get", [Bar] as Class[]).returnType == Bar
            assert Bar.getDeclaredField("Foo__INSTANCE").type == Bar
            assert Bar.getMethod("setINSTANCE", [Bar] as Class[])
            assert Bar.getMethod("getINSTANCE").returnType == Bar
        '''
    }
}