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.causeway.testing.unittestsupport.applib.matchers;
  
  import org.hamcrest.CoreMatchers;
  import org.hamcrest.Description;
  import org.hamcrest.Matcher;
  import org.hamcrest.TypeSafeMatcher;
  
  import static org.hamcrest.CoreMatchers.nullValue;
  
  /**
   * Hamcrest {@link org.hamcrest.Matcher} implementations.
   *
   * @since 2.0 {@index}
   */
  public final class StringMatchers {
  
      private StringMatchers() { }
  
      public static Matcher<String> nonEmptyString() {
          return new TypeSafeMatcher<>() {
              @Override
              public boolean matchesSafely(final String str) {
                  return str != null && str.length() > 0;
              }
  
              @Override
              public void describeTo(final Description description) {
                  description.appendText("a non empty string");
              }
  
          };
      }
  
      public static Matcher<String> nonEmptyStringOrNull() {
          return CoreMatchers.anyOf(nullValue(String.class), nonEmptyString());
      }
  
      public static Matcher<String> matches(final String regex) {
          return new TypeSafeMatcher<>() {
  
              @Override
              public void describeTo(final Description description) {
                  description.appendText("string matching " + regex);
              }
  
              @Override
              public boolean matchesSafely(final String str) {
                  return str.matches(regex);
              }
          };
      }
  
      public static Matcher<String> startsWith(final String expected) {
          return new TypeSafeMatcher<>() {
  
              @Override
              public void describeTo(Description description) {
                  description.appendText(" starts with '" + expected + "'");
              }
  
              @Override
              public boolean matchesSafely(String actual) {
                  return actual.startsWith(expected);
              }
          };
      }
  
      public static Matcher<String> contains(final String expected) {
          return new TypeSafeMatcher<>() {
  
              @Override
              public void describeTo(Description description) {
                  description.appendText(" contains '" + expected + "'");
              }
  
              @Override
              public boolean matchesSafely(String actual) {
                  return actual.contains(expected);
              }
          };
      }
  
  }
  