def test_clean(self):
self.assertEqual(HTML5Strip.strip("<a> X <b><c></c> X </b></a>"), "<a> X <b><c></c> X </b></a>")
self.assertEqual(HTML5Strip.strip("<a> X <b><c></c></b> X </a>"), "<a> X <b><c></c></b> X </a>")
self.assertEqual(HTML5Strip.strip("<a><b><c></c></b> X </a>"), "<a> X </a>")
self.assertEqual(HTML5Strip.strip("<a> X <b><c></c></b></a>"), "<a> X </a>")
self.assertEqual(HTML5Strip.strip("<div> X <div> X <div></div></div></div>"), "<div> X <div> X </div></div>")
self.assertEqual(HTML5Strip.strip(" <p>hello, world</p> "), "<p>hello, world</p>")
self.assertEqual(HTML5Strip.strip("<p>hello, world<br></p>"), "<p>hello, world</p>")
self.assertEqual(HTML5Strip.strip("<br><p>hello, world</p><br>"), "<p>hello, world</p>")
self.assertEqual(HTML5Strip.strip("<a><b><c><d></d></c> X </b></a>"), "<a><b> X </b></a>")
self.assertEqual(HTML5Strip.strip("<a> <b> X </b> </a>"), "<a> <b> X </b> </a>")
self.assertEqual(HTML5Strip.strip("<a> <b> <c> <d> <e>X</e> </d> </c> </b> </a>"), "<a> <b> <c> <d> <e>X</e> </d> </c> </b> </a>")
self.assertEqual(HTML5Strip.strip("<a> <x></x> <b> X </b> </a>"), "<a> <b> X </b> </a>") # preserve spaces
self.assertEqual(HTML5Strip.strip("<a> </a> <b> </b> <c> X </c> <b> </b> <a> </a>"), "<c> X </c>")
self.assertEqual(HTML5Strip.strip("<a> </a> <b> </b> <c> </c> <b> </b> </a>"), "")
self.assertEqual(HTML5Strip.strip("<p>a<br><br>b</p>"), "<p>a<br><br>b</p>")
self.assertEqual(HTML5Strip.strip("<p><br><br>b</p>"), "<p>b</p>")
self.assertEqual(HTML5Strip.strip("<p>b<br><br></p>"), "<p>b</p>")
self.assertEqual(HTML5Strip.strip("<a><b> x </b><br><br> c </a>"), "<a><b> x </b><br><br> c </a>")
self.assertEqual(HTML5Strip.strip("<a><br><br><b> x </b><br><br> c </a>"), "<a><b> x </b><br><br> c </a>")
self.assertEqual(HTML5Strip.strip("<a> a <br><br><b> x </b></a>"), "<a> a <br><br><b> x </b></a>")
self.assertEqual(HTML5Strip.strip("<a></a>x"), "x")
self.assertEqual(HTML5Strip.strip("x<a></a>"), "x")
self.assertEqual(HTML5Strip.strip("x<a></a>y"), "xy")
self.assertEqual(HTML5Strip.strip("<p>a</p> <p></p> <p></p> <p>a<br></p>"), "<p>a</p> <p></p> <p></p> <p>a</p>")
self.assertEqual(HTML5Strip.strip("<p></p> <p><br>a</p> <p></p> <p>a<br></p> <p></p>"), "<p>a</p> <p></p> <p>a</p>")
self.assertEqual(HTML5Strip.strip("<p></p> <p><br>a</p> <p><br>a</p> <p></p> <p>a</p>"), "<p>a</p> <p><br>a</p> <p></p> <p>a</p>")
self.assertEqual(HTML5Strip.strip("<p></p> <p>a</p> <p></p> <p>a<br></p> <p>a<br></p>"), "<p>a</p> <p></p> <p>a<br></p> <p>a</p>")
