/*
    * 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
    *
    *      https://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.commons.text.lookup;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertNull;
  
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests {@link ConstantStringLookup}.
   */
  class ConstantStringLookupBasicTest {
  
      /**
       * Test fixture.
       */
      public static final String NULL_STRING_FIXTURE = null;
  
      /**
       * Test fixture.
       */
      public static final String STRING_FIXTURE = "Hello World!";
  
      /**
       * Clears the test environment. Here the static cache of the constant lookup class is wiped out.
       */
      @AfterEach
      public void afterEach() {
          ConstantStringLookup.clear();
      }
  
      /**
       * Clears the test environment. Here the static cache of the constant lookup class is wiped out.
       */
      @BeforeEach
      public void beforeEach() {
          ConstantStringLookup.clear();
      }
  
      @Test
      void testNull() {
          assertNull(ConstantStringLookup.INSTANCE.apply(null));
      }
  
      @Test
      void testNullClassFetch() {
          assertNull(new ConstantStringLookup() {
              @Override
              protected Class<?> fetchClass(final String className) throws ClassNotFoundException {
                  return null;
              }
          }.apply(ConstantStringLookupBasicTest.class.getName() + ".STRING_FIXTURE"));
      }
  
      @Test
      void testNullValue() {
          assertEquals(NULL_STRING_FIXTURE, ConstantStringLookup.INSTANCE
              .apply(ConstantStringLookupBasicTest.class.getName() + ".NULL_STRING_FIXTURE"));
      }
  
      @Test
      void testOne() {
          assertEquals(STRING_FIXTURE,
              ConstantStringLookup.INSTANCE.apply(ConstantStringLookupBasicTest.class.getName() + ".STRING_FIXTURE"));
      }
  
      @Test
      void testToString() {
          // does not blow up and gives some kind of string.
          assertFalse(ConstantStringLookup.INSTANCE.toString().isEmpty());
      }
  
  }