/*
    * 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.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.allOf;
  import static org.hamcrest.Matchers.containsString;
  import static org.hamcrest.Matchers.is;
  
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  
  import de.smartics.testdoc.annotations.Uut;
  import de.smartics.testdoc.categories.type.Coverage;
  import de.smartics.util.test.lang.LangTestUtils;
  
  /**
   * Tests {@link Arg}.
   */
  @Uut(type = Arg.class)
  public class ArgTest
  {
    // ********************************* Fields *********************************
  
    // --- constants ------------------------------------------------------------
  
    private static final String ARGUMENT_NAME = "arg";
  
    private static final Object OBJECT_VALUE = "object";
  
    private static final String STRING_VALUE = "string";
  
    private static final String MESSAGE = "message";
  
    // --- members --------------------------------------------------------------
  
    // ****************************** Inner Classes *****************************
  
    // ********************************* Methods ********************************
  
    // --- prepare --------------------------------------------------------------
  
    // --- helper ---------------------------------------------------------------
  
    // --- tests ----------------------------------------------------------------
  
    // ... null .................................................................
  
    @Test(expected = NullPointerException.class)
    public void rejectsNullValueWithNullPointerException()
    {
      Arg.checkNotNull(ARGUMENT_NAME, null);
    }
  
    @Test
    public void acceptsNonNullValue()
    {
      Arg.checkNotNull(ARGUMENT_NAME, OBJECT_VALUE);
    }
  
    @SuppressWarnings("unchecked")
    @Test(expected = NullPointerException.class)
    public void allowsToPassAnOptionalMessageForNullCheck()
    {
      try
      {
        Arg.checkNotNull(ARGUMENT_NAME, null, MESSAGE);
      }
      catch (final NullArgumentException e)
      {
        assertThat(e.getMessage(),
            allOf(containsString(ARGUMENT_NAME), containsString(MESSAGE)));
        throw e;
      }
    }
  
    @Test
    @Category(Coverage.class)
    public void allowsToPassAnOptionalMessageForNullCheckEvenIfNoExceptionIsThrown()
    {
      Arg.checkNotNull(ARGUMENT_NAME, OBJECT_VALUE, MESSAGE);
    }
  
    // ... blank ................................................................
  
    @Test(expected = NullPointerException.class)
   public void rejectsBlankValueWithNullPointerException()
   {
     Arg.checkNotBlank(ARGUMENT_NAME, null);
   }
 
   @Test
   public void acceptsNonBlankValue()
   {
     Arg.checkNotBlank(ARGUMENT_NAME, STRING_VALUE);
   }
 
   @SuppressWarnings("unchecked")
   @Test(expected = NullArgumentException.class)
   public void allowsToPassAnOptionalMessageForBlankCheck()
   {
     try
     {
       Arg.checkNotBlank(ARGUMENT_NAME, null, MESSAGE);
     }
     catch (final NullArgumentException e)
     {
       assertThat(e.getMessage(),
           allOf(containsString(ARGUMENT_NAME), containsString(MESSAGE)));
       throw e;
     }
   }
 
   @Test
   @Category(Coverage.class)
   public void allowsToPassAnOptionalMessageForBlankCheckEvenIfNoExceptionIsThrown()
   {
     final Object object =
         Arg.checkNotNull(ARGUMENT_NAME, OBJECT_VALUE, MESSAGE);
     assertThat(object, is(OBJECT_VALUE));
   }
 
   // ... basics ...............................................................
 
   @Test
   @Category(Coverage.class)
   public void isAnUtilityClass()
   {
     LangTestUtils.runPrivateConstructorTest(Arg.class);
   }
 }