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   * 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, software
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   * See the License for the specific language governing permissions and
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  package org.apache.beam.sdk.extensions.ml;
  
  import static org.junit.Assert.assertEquals;
  
  import com.google.cloud.vision.v1.AnnotateImageRequest;
  import com.google.cloud.vision.v1.Feature;
  import com.google.protobuf.ByteString;
  import java.util.Collections;
  import java.util.List;
  import org.apache.beam.sdk.values.KV;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  @RunWith(JUnit4.class)
  public class CloudVisionTest {
  
    private static final String TEST_URI = "test_uri";
    private static final ByteString TEST_BYTES = ByteString.copyFromUtf8("12345");;
    private List<Feature> features =
        Collections.singletonList(Feature.newBuilder().setType(Feature.Type.LABEL_DETECTION).build());
  
    @Test
    public void shouldConvertStringToRequest() {
      CloudVision.AnnotateImagesFromGcsUri annotateImagesFromGcsUri =
          CloudVision.annotateImagesFromGcsUri(null, features, 1, 1);
      AnnotateImageRequest request = annotateImagesFromGcsUri.mapToRequest(TEST_URI, null);
      assertEquals(1, request.getFeaturesCount());
      assertEquals(TEST_URI, request.getImage().getSource().getGcsImageUri());
    }
  
    @Test
    public void shouldConvertByteStringToRequest() {
      CloudVision.AnnotateImagesFromBytes annotateImagesFromBytes =
          CloudVision.annotateImagesFromBytes(null, features, 1, 1);
      AnnotateImageRequest request = annotateImagesFromBytes.mapToRequest(TEST_BYTES, null);
      assertEquals(1, request.getFeaturesCount());
      assertEquals(TEST_BYTES, request.getImage().getContent());
    }
  
    @Test
    public void shouldConvertKVOfStringToRequest() {
      CloudVision.AnnotateImagesFromGcsUriWithContext annotateImagesFromGcsUriWithContext =
          CloudVision.annotateImagesFromGcsUriWithContext(features, 1, 1);
      AnnotateImageRequest request =
          annotateImagesFromGcsUriWithContext.mapToRequest(KV.of(TEST_URI, null), null);
      assertEquals(1, request.getFeaturesCount());
      assertEquals(TEST_URI, request.getImage().getSource().getGcsImageUri());
    }
  
    @Test
    public void shouldConvertKVOfBytesToRequest() {
      CloudVision.AnnotateImagesFromBytesWithContext annotateImagesFromBytesWithContext =
          CloudVision.annotateImagesFromBytesWithContext(features, 1, 1);
      AnnotateImageRequest request =
          annotateImagesFromBytesWithContext.mapToRequest(KV.of(TEST_BYTES, null), null);
      assertEquals(1, request.getFeaturesCount());
      assertEquals(TEST_BYTES, request.getImage().getContent());
    }
  }
  