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;
  
  import java.io.Serializable;
  import org.apache.beam.vendor.grpc.v1p69p0.com.google.protobuf.ByteString;
  import org.hamcrest.Description;
  import org.hamcrest.TypeSafeMatcher;
  
  /** Matchers that are useful when writing Dataflow tests. */
  public class DataflowMatchers {
    /** Matcher for {@link ByteString} that prints the strings in UTF8. */
    public static class ByteStringMatcher extends TypeSafeMatcher<ByteString>
        implements Serializable {
      private ByteString expected;
  
      private ByteStringMatcher(ByteString expected) {
        this.expected = expected;
      }
  
      public static ByteStringMatcher byteStringEq(ByteString expected) {
        return new ByteStringMatcher(expected);
      }
  
      @Override
      public void describeTo(Description description) {
        description.appendText("ByteString(").appendText(expected.toStringUtf8()).appendText(")");
      }
  
      @Override
      public void describeMismatchSafely(ByteString actual, Description description) {
        description.appendText("was ByteString(").appendText(actual.toStringUtf8()).appendText(")");
      }
  
      @Override
      protected boolean matchesSafely(ByteString actual) {
        return actual.equals(expected);
      }
    }
  }
  