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.util.logging.Level;
  import java.util.logging.LogRecord;
  import org.hamcrest.Description;
  import org.hamcrest.Matcher;
  import org.hamcrest.Matchers;
  import org.hamcrest.TypeSafeMatcher;
  
  /** Hamcrest matcher for asserts on {@link LogRecord} instances. */
  public final class LogRecordMatcher extends TypeSafeMatcher<LogRecord> {
    private final String substring;
    private final Matcher<Level> levelMatcher;
  
    private LogRecordMatcher(Level level, String substring) {
      this(Matchers.is(level), substring);
    }
  
    /**
     * Match {@link LogRecord} instances with the specified level, and containing the specified
     * message substring.
     */
    public static LogRecordMatcher hasLog(Level level, String substring) {
      return new LogRecordMatcher(level, substring);
    }
  
    /** Match {@link LogRecord} instances containing the specified message substring. */
    public static LogRecordMatcher hasLog(String substring) {
      return new LogRecordMatcher(Matchers.any(Level.class), substring);
    }
  
    /**
     * Match a {@link LogRecord} in the specified {@link Iterable} containing the specified message
     * substring.
     */
    public static Matcher<Iterable<? super LogRecord>> hasLogItem(String substring) {
      return Matchers.hasItem(hasLog(substring));
    }
  
    /**
     * Match a {@link LogRecord} in the specified {@link Iterable} with the specified level, and
     * containing the specified message substring.
     */
    public static Matcher<Iterable<? super LogRecord>> hasLogItem(Level level, String substring) {
      return Matchers.hasItem(hasLog(level, substring));
    }
  
    private LogRecordMatcher(Matcher<Level> levelMatcher, String substring) {
      this.levelMatcher = levelMatcher;
      this.substring = substring;
    }
  
    @Override
    public void describeTo(Description description) {
      description.appendText("level ");
      levelMatcher.describeTo(description);
      description.appendText(String.format(" and message containing <%s>", substring));
    }
  
    @Override
    public void describeMismatchSafely(LogRecord item, Description description) {
      description
          .appendText("was log with message \"")
          .appendText(item.getMessage())
          .appendText("\" at severity ")
          .appendValue(item.getLevel());
    }
  
    @Override
    protected boolean matchesSafely(LogRecord item) {
      return levelMatcher.matches(item.getLevel()) && item.getMessage().contains(substring);
    }
  }
  