assertEquals(" ", simplifyPath(" "));
  }

  public void testSimplify2() {
    assertEquals("x", simplifyPath("x"));
  }

  public void testSimplify3() {
    assertEquals("/a/b/c/d", simplifyPath("/a/b/c/d"));
  }

  public void testSimplify4() {
    assertEquals("/a/b/c/d", simplifyPath("/a/b/c/d/"));
  }

  public void testSimplify5() {
    assertEquals("/a/b", simplifyPath("/a//b"));
  }