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.
   */
  package org.apache.beam.runners.dataflow.worker.testing;
  
  import com.google.api.client.json.GenericJson;
  import com.google.api.client.json.gson.GsonFactory;
  import java.io.IOException;
  import org.hamcrest.Description;
  import org.hamcrest.TypeSafeMatcher;
  import org.json.JSONException;
  import org.skyscreamer.jsonassert.JSONCompare;
  import org.skyscreamer.jsonassert.JSONCompareMode;
  import org.skyscreamer.jsonassert.JSONCompareResult;
  
  /**
   * Matcher to compare {@link GenericJson}s using JSONassert's {@link JSONCompare}. This matcher does
   * not rely on {@link GenericJson#equals(Object)}, which may use fields irrelevant to JSON values.
   */
  public final class GenericJsonMatcher extends TypeSafeMatcher<GenericJson> {
  
    private String expectedJsonText;
  
    private static final GsonFactory gsonFactory = GsonFactory.getDefaultInstance();
  
    private GenericJsonMatcher(GenericJson expected) {
      try {
        expectedJsonText = gsonFactory.toString(expected);
      } catch (IOException ex) {
        throw new IllegalArgumentException("Could not parse JSON", ex);
      }
    }
  
    public static GenericJsonMatcher jsonOf(GenericJson genericJson) {
      return new GenericJsonMatcher(genericJson);
    }
  
    @Override
    protected boolean matchesSafely(GenericJson actual) {
      try {
        String actualJsonText = gsonFactory.toString(actual);
        JSONCompareResult result =
            JSONCompare.compareJSON(expectedJsonText, actualJsonText, JSONCompareMode.STRICT);
        return result.passed();
      } catch (IOException | JSONException ex) {
        throw new IllegalArgumentException("Could not parse JSON", ex);
      }
    }
  
    @Override
    public void describeTo(Description description) {
      description.appendText(expectedJsonText);
    }
  }
  