/*
 * SPDX-License-Identifier: Apache-2.0
 *
 * The OpenSearch Contributors require contributions made to
 * this file be licensed under the Apache-2.0 license or a
 * compatible open source license.
 */

/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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,
 * 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.
 */
/*
 * Modifications Copyright OpenSearch Contributors. See
 * GitHub history for details.
 */

package org.opensearch.gradle.test;

import com.carrotsearch.randomizedtesting.ClassModel;
import com.carrotsearch.randomizedtesting.ClassModel.MethodModel;
import com.carrotsearch.randomizedtesting.TestMethodProvider;

import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Map;

/**
 * Backwards compatible test* method provider (public, non-static).
 *
 * copy of org.apache.lucene.util.LuceneJUnit3MethodProvider to avoid a dependency between build and test fw.
 */
public final class JUnit3MethodProvider implements TestMethodProvider {
    @Override
    public Collection<Method> getTestMethods(Class<?> suiteClass, ClassModel classModel) {
        Map<Method, MethodModel> methods = classModel.getMethods();
        ArrayList<Method> result = new ArrayList<>();
        for (MethodModel mm : methods.values()) {
            // Skip any methods that have overrieds/ shadows.
            if (mm.getDown() != null) continue;

            Method m = mm.element;
            if (m.getName().startsWith("test")
                && Modifier.isPublic(m.getModifiers())
                && !Modifier.isStatic(m.getModifiers())
                && m.getParameterCount() == 0) {
                result.add(m);
            }
        }
        return result;
    }
}
