content: /*
   * 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.
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  package org.apache.beam.sdk.extensions.euphoria.core.client.operator;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertNotNull;
  import static org.junit.Assert.assertTrue;
  
  import org.apache.beam.sdk.extensions.euphoria.core.client.type.TypePropagationAssert;
  import org.apache.beam.sdk.values.PCollection;
  import org.apache.beam.sdk.values.TypeDescriptor;
  import org.apache.beam.sdk.values.TypeDescriptors;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Test operator MapElement. */
  @RunWith(JUnit4.class)
  @SuppressWarnings({
    "rawtypes" // TODO(https://github.com/apache/beam/issues/20447)
  })
  public class MapElementsTest {
  
    @Test
    public void testBuild() {
      final PCollection<String> dataset = TestUtils.createMockDataset(TypeDescriptors.strings());
      final PCollection<String> mapped = MapElements.named("Map1").of(dataset).using(s -> s).output();
      final MapElements map = (MapElements) TestUtils.getProducer(mapped);
      assertTrue(map.getName().isPresent());
      assertEquals("Map1", map.getName().get());
      assertNotNull(map.getMapper());
    }
  
    @Test
    public void testBuild_WithCounters() {
      final PCollection<String> dataset = TestUtils.createMockDataset(TypeDescriptors.strings());
      final PCollection<String> mapped =
          MapElements.named("Map1")
              .of(dataset)
              .using(
                  (input, context) -> {
                    // use simple counter
                    context.getCounter("my-counter").increment();
  
                    return input.toLowerCase();
                  })
              .output();
  
      final MapElements map = (MapElements) TestUtils.getProducer(mapped);
      assertTrue(map.getName().isPresent());
      assertEquals("Map1", map.getName().get());
      assertNotNull(map.getMapper());
    }
  
    @Test
    public void testBuild_ImplicitName() {
      final PCollection<String> dataset = TestUtils.createMockDataset(TypeDescriptors.strings());
      final PCollection<String> mapped = MapElements.of(dataset).using(s -> s).output();
      final MapElements map = (MapElements) TestUtils.getProducer(mapped);
      assertFalse(map.getName().isPresent());
    }
  
    @SuppressWarnings("unchecked")
    @Test
    public void testTypePropagation() {
      final PCollection<Integer> input = TestUtils.createMockDataset(TypeDescriptors.integers());
      final TypeDescriptor<String> outputType = TypeDescriptors.strings();
      final PCollection<String> mapped =
          MapElements.named("Int2Str").of(input).using(String::valueOf, outputType).output();
      final MapElements map = (MapElements) TestUtils.getProducer(mapped);
      TypePropagationAssert.assertOperatorTypeAwareness(map, outputType);
    }
  }
  