/*
 * 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.wayang.spark.operators;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Arrays;
import org.apache.wayang.core.function.TransformationDescriptor;
import org.apache.wayang.core.platform.ChannelInstance;
import org.apache.wayang.spark.channels.RddChannel;
import org.junit.Test;

/**
 * Test suite for {@link SparkTextFileSink}.
 */
public class SparkTextFileSinkTest extends SparkOperatorTestBase {

    @Test
    public void testWritingDoesNotFail() throws IOException {
        // Prepare the sink.
        Path tempDir = Files.createTempDirectory("wayang-spark");
        tempDir.toFile().deleteOnExit();
        Path targetFile = tempDir.resolve("testWritingDoesNotFail");
        RddChannel.Instance input = this.createRddChannelInstance(Arrays.asList(1.123f, -0.1f, 3f));
        final SparkTextFileSink<Float> sink = new SparkTextFileSink<>(
                targetFile.toUri().toString(),
                new TransformationDescriptor<>(
                        f -> String.format("%.2f", f),
                        Float.class, String.class
                )
        );

        // Set up the ChannelInstances.
        final ChannelInstance[] inputs = new ChannelInstance[]{input};
        final ChannelInstance[] outputs = new ChannelInstance[]{};

        // Execute.
        this.evaluate(sink, inputs, outputs);
    }

}