/*
    * Copyright 2011-2013 smartics, Kronseder & Reiner GmbH
    *
    * Licensed 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 de.smartics.util.lang;
  
  import static org.hamcrest.CoreMatchers.equalTo;
  import static org.hamcrest.CoreMatchers.is;
  import static org.hamcrest.Matchers.containsString;
  import static org.junit.Assert.assertThat;
  
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  
  import de.smartics.testdoc.annotations.Uut;
  import de.smartics.testdoc.categories.type.Construction;
  
  /**
   * Tests {@link NullArgumentException}.
   */
  @Category(Construction.class)
  public class NullArgumentExceptionTest
  {
    // ********************************* Fields *********************************
  
    // --- constants ------------------------------------------------------------
  
    // --- members --------------------------------------------------------------
  
    // ****************************** Inner Classes *****************************
  
    // ********************************* Methods ********************************
  
    // --- prepare --------------------------------------------------------------
  
    // --- helper ---------------------------------------------------------------
  
    // --- tests ----------------------------------------------------------------
  
    @Test
    @Uut(type = NullArgumentException.class,
        method = "NullArgumentException(java.lang.String)")
    public void allowsToSpecifyTheNameOfTheMissingArgument()
    {
      final String argumentName = "testArgument";
      final NullArgumentException uut = new NullArgumentException(argumentName);
  
      assertThat(uut.getMessage(), containsString(argumentName));
    }
  
    @Test
    @Uut(type = NullArgumentException.class,
        method = "NullArgumentException(java.lang.String)")
    public void allowsToLeaveOutTheNameOfTheMissingArgument()
    {
      final String argumentName = null;
      final NullArgumentException uut = new NullArgumentException(argumentName);
  
      assertThat(uut.getMessage(), is(equalTo("Argument must not be 'null'.")));
    }
  
    @Test
    @Uut(type = NullArgumentException.class, method = "NullArgumentException()")
    public void providesANoargsConstuctorAlthoughItsUseIsDiscouraged()
    {
      final NullArgumentException uut = new NullArgumentException();
  
      assertThat(uut.getMessage(), is(equalTo("Argument must not be 'null'.")));
    }
  }