flink-libraries/flink-table-common/src/test/java/org/apache/flink/table/descriptors/DescriptorTestBase.java

/*
 * 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
 *
 *     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.apache.flink.table.descriptors;

import org.apache.flink.util.Preconditions;

import org.junit.Test;

import java.util.Collections;
import java.util.List;
import java.util.Map;

import static org.junit.Assert.assertEquals;

/**
 * Test base for testing {@link Descriptor} together with {@link DescriptorValidator}.
 */
public abstract class DescriptorTestBase {

	/**
	 * Returns a set of valid descriptors.
	 */
	protected abstract List<Descriptor> descriptors();

	/**
	 * Returns a set of properties for each valid descriptor.
	 */
	protected abstract List<Map<String, String>> properties();

	/**
	 * Returns a validator that can validate all valid descriptors.
	 */
	protected abstract DescriptorValidator validator();

	@Test
	public void testValidation() {
		final List<Descriptor> descriptors = descriptors();
		final List<Map<String, String>> properties = properties();

		Preconditions.checkArgument(descriptors.size() == properties.size());

		for (int i = 0; i < descriptors.size(); i++) {
			verifyProperties(descriptors.get(i), properties.get(i));
		}
	}

	protected void verifyProperties(Descriptor descriptor, Map<String, String> expected) {
		// test produced properties
		assertEquals(expected, descriptor.toProperties());

		// test validation logic
		final DescriptorProperties properties = new DescriptorProperties();
		properties.putProperties(expected);
		validator().validate(properties);
	}

	protected void addPropertyAndVerify(Descriptor descriptor, String property, String newValue) {
		final DescriptorProperties properties = new DescriptorProperties();
		properties.putProperties(descriptor.toProperties());
		final DescriptorProperties copy = properties.withoutKeys(Collections.singletonList(property));
		copy.putString(property, newValue);
		validator().validate(copy);
	}

	protected void removePropertyAndVerify(Descriptor descriptor, String property) {
		final DescriptorProperties properties = new DescriptorProperties();
		properties.putProperties(descriptor.toProperties());
		final DescriptorProperties copy = properties.withoutKeys(Collections.singletonList(property));
		validator().validate(copy);
	}
}