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  package org.apache.cayenne.util;
  
  import org.junit.Test;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNull;
  import static org.junit.Assert.assertTrue;
  
  public class RegexUtilTest {
  
      @Test
      public void testSubstBackslashes() {
          assertTrue(RegexUtil.BACKSLASH.matcher("\\").find());
          assertTrue(RegexUtil.BACKSLASH.matcher("abc\\").find());
  
          assertNull(RegexUtil.substBackslashes(null));
          assertEquals("abc", RegexUtil.substBackslashes("abc"));
          assertEquals("ab/c", RegexUtil.substBackslashes("ab/c"));
  
          assertEquals("ab/c", RegexUtil.substBackslashes("ab\\c"));
          assertEquals("ab//c", RegexUtil.substBackslashes("ab\\\\c"));
          assertEquals("ab//c", RegexUtil.substBackslashes("ab\\/c"));
          assertEquals("/ab/c", RegexUtil.substBackslashes("\\ab\\c"));
      }
  
      @Test
      public void testGetPackagePath() {
          assertTrue(RegexUtil.DOT.matcher(".").find());
          assertTrue(RegexUtil.DOT.matcher("abc.aa.aa").find());
  
          assertEquals("", RegexUtil.getPackagePath(null));
          assertEquals("", RegexUtil.getPackagePath(""));
          assertEquals("", RegexUtil.getPackagePath("b"));
          assertEquals("a", RegexUtil.getPackagePath("a.b"));
          assertEquals("a/c", RegexUtil.getPackagePath("a.c.b"));
      }
  
  }
  