@Test
public void testHrefStringArgument()
{

  assertEquals("#null",vh.href((String)null));
    assertEquals("#xyz", vh.href("xyz"));
    assertEquals("http://xyz",vh.href("http://xyz"));
assertEquals("hTtp://Xyz.com",vh.href("hTtp://Xyz.com"));
assertEquals("https://xyz",vh.href("https://xyz"));
assertEquals("HTTPS://xyz",vh.href("HTTPS://xyz"));
}