/*
    * Copyright 2007 Kasper B. Graversen
    * 
    * 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 org.supercsv.cellprocessor.constraint;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  import static org.junit.Assert.fail;
  import static org.supercsv.SuperCsvTestUtils.ANONYMOUS_CSVCONTEXT;
  
  import java.util.regex.PatternSyntaxException;
  
  import org.junit.Before;
  import org.junit.Test;
  import org.supercsv.cellprocessor.ift.CellProcessor;
  import org.supercsv.exception.SuperCsvCellProcessorException;
  import org.supercsv.exception.SuperCsvConstraintViolationException;
  import org.supercsv.mock.IdentityTransform;
  
  /**
   * Tests the StrRegEx constraint.
   * 
   * @author James Bassett
   */
  public class StrRegExTest {
  	
  	private static final String REGEX = "\\$[0-9]+\\.[0-9]{2}";
  	private static final String MSG = "Must be a valid dollar amount, e.g. $123.45";
  	
  	private CellProcessor processor;
  	private CellProcessor processorChain;
  	
  	/**
  	 * Sets up the processors for the test using all constructor combinations.
  	 */
  	@Before
  	public void setUp() {
  		processor = new StrRegEx(REGEX);
  		processorChain = new StrRegEx(REGEX, new IdentityTransform());
  		StrRegEx.registerMessage(REGEX, MSG);
  	}
  	
  	/**
  	 * Tests unchained/chained execution with a String matching the regex.
  	 */
  	@Test
  	public void testValidInput() {
  		String input = "$123.45";
  		assertEquals(input, processor.execute(input, ANONYMOUS_CSVCONTEXT));
  		assertEquals(input, processorChain.execute(input, ANONYMOUS_CSVCONTEXT));
  	}
  	
  	/**
  	 * Tests execution with input that doesn't match the regex.
  	 */
  	@Test
  	public void testInvalidInput() {
  		String input = "12345";
  		try {
  			processor.execute(input, ANONYMOUS_CSVCONTEXT);
  			fail("should have thrown SuperCsvConstraintViolationException");
  		}
  		catch(SuperCsvConstraintViolationException e) {
  			// exception msg should contain registered message
  			assertTrue(e.getMessage().contains(MSG));
  		}
  	}
  	
  	/**
  	 * Tests execution with input that doesn't match the regex (and no message is registered).
  	 */
  	@Test
  	public void testInvalidInputWithNoMessage() {
  		processor = new StrRegEx("\\s"); // only whitespace
  		String input = "12345";
  		try {
  			processor.execute(input, ANONYMOUS_CSVCONTEXT);
  			fail("should have thrown SuperCsvConstraintViolationException");
  		}
  		catch(SuperCsvConstraintViolationException e) {
  			// exception msg should not contain the registered message (it's a different regex)
  			assertFalse(e.getMessage().contains(MSG));
  		}
  	}
  	
  	/**
 	 * Tests construction of the processor with a null regex (should throw an Exception).
 	 */
 	@Test(expected = NullPointerException.class)
 	public void testWithNullRegex() {
 		new StrRegEx(null);
 	}
 	
 	/**
 	 * Tests construction of the processor with an empty regex (should throw an Exception).
 	 */
 	@Test(expected = IllegalArgumentException.class)
 	public void testWithEmptyRegex() {
 		new StrRegEx("");
 	}
 	
 	/**
 	 * Tests construction of the processor with an invalid regex (should throw an Exception).
 	 */
 	@Test(expected = PatternSyntaxException.class)
 	public void testWithInvalidRegex() {
 		new StrRegEx("*****");
 	}
 	
 	/**
 	 * Tests execution with a null input (should throw an Exception).
 	 */
 	@Test(expected = SuperCsvCellProcessorException.class)
 	public void testWithNull() {
 		processor.execute(null, ANONYMOUS_CSVCONTEXT);
 	}
 	
 }