/**
    * 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.creadur.whisker.it;
  
  import static org.apache.creadur.whisker.it.CheckHelpers.*;
  
  import java.io.*;
  import java.nio.charset.StandardCharsets;
  import java.util.ArrayList;
  import java.util.List;
  
  public class FileVerifier {
  
      final File licenseFile;
      final List<Check> checks;
      final String title;
  
  
      public FileVerifier(final File licenseFile, final String displayName) {
          this.licenseFile = licenseFile;
          this.checks = new ArrayList<Check>();
          this.title = "FAILURES in " + displayName + ":";
      }
  
      public FileVerifier expectThat(final Check check) {
          this.checks.add(check);
          return this;
      }
  
      public String failures() throws Exception {
          BufferedReader reader = new BufferedReader(new InputStreamReader(
                  new FileInputStream(licenseFile), StandardCharsets.UTF_8));
          try {
              String line = null;
              do {
                  line = checkLine(reader.readLine());
              } while (line != null);
          } finally {
              reader.close();
          }
  
          final Results results = new Results().titled(title);
          return to(results).report(checks).collate();
      }
  
      private String checkLine(final String line) {
          doCheck(line).with(checks);
          return line;
      }
  }