How to use the xhtml2pdf.util.getFrameDimensions function in xhtml2pdf

def test_FrameDimensions_bottom_right_width_height_with_margin(self):
        dims = {
            'bottom': '10pt',
            'right': '20pt',
            'width': '70pt',
            'height': '80pt',
            'margin-top': '10pt',
            'margin-left': '15pt',
            'margin-bottom': '20pt',
            'margin-right': '25pt',
        }
        expected = (25.0, 120.0, 30.0, 50.0)
        result = getFrameDimensions(dims, 100, 200)
        self.assertEquals(expected, result)

def test_FrameDimensions_left_top_width_height(self):
        #builder = pisaCSSBuilder(mediumSet=['all'])
        dims = {
            'left': '10pt',
            'top': '20pt',
            'width': '30pt',
            'height': '40pt',
        }
        expected = (10.0, 20.0, 30.0, 40.0)
        result = getFrameDimensions(dims, 100, 200)
        self.assertEquals(expected, result)

def test_FrameDimensions_left_top_width_height_with_margin(self):
        dims = {
            'left': '10pt',
            'top': '20pt',
            'width': '70pt',
            'height': '80pt',
            'margin-top': '10pt',
            'margin-left': '15pt',
            'margin-bottom': '20pt',
            'margin-right': '25pt',
        }
        expected = (25.0, 30.0, 30.0, 50.0)
        result = getFrameDimensions(dims, 100, 200)
        self.assertEquals(expected, result)

def test_trame_dimentions_for_width_without_left_or_right(self):
        dims = {
            #'left': '10pt',
            'top': '20pt',
            'width': '30pt',
            'height': '40pt',
        }
        expected = (0.0, 20.0, 100.0, 40.0)
        result = getFrameDimensions(dims, 100, 200)
        self.assertEquals(expected, result)

def test_trame_dimentions_for_height_without_top_or_bottom(self):
        dims = {
            'left': '10pt',
            #'top': '20pt',
            'width': '30pt',
            'height': '40pt',
        }
        expected = (10.0, 0.0, 30.0, 200.0)
        result = getFrameDimensions(dims, 100, 200)
        self.assertEquals(expected, result)

def test_FrameDimensions_left_top_bottom_right(self):
        dims = {
            'left': '10pt',
            'top': '20pt',
            'bottom': '30pt',
            'right': '40pt',
        }
        expected = (10.0, 20.0, 50.0, 150.0)
        result = getFrameDimensions(dims, 100, 200)
        self.assertEquals(expected, result)

def test_FrameDimensions_bottom_right_width_height(self):
        dims = {
            'bottom': '10pt',
            'right': '20pt',
            'width': '70pt',
            'height': '80pt',
        }
        expected = (10.0, 110.0, 70.0, 80.0)
        result = getFrameDimensions(dims, 100, 200)
        self.assertEquals(expected, result)

def test_frame_dimensions_for_box_len_eq_4(self):
        dims = {
            '-pdf-frame-box': ['12pt', '12,pt', '12pt', '12pt']
        }
        expected = [12.0, 12.0, 12.0, 12.0]
        result = getFrameDimensions(dims, 100, 200)
        self.assertEqual(result, expected)

def _pisaAddFrame(self, name, data, first=False, border=None, size=(0, 0)):
        c = self.c
        if not name:
            name = "-pdf-frame-%d" % c.UID()
        if data.get('is_landscape', False):
            size = (size[1], size[0])
        x, y, w, h = getFrameDimensions(data, size[0], size[1])
        # print name, x, y, w, h
        # if not (w and h):
        #    return None
        if first:
            return name, None, data.get("-pdf-frame-border", border), x, y, w, h, data

        return (name, data.get("-pdf-frame-content", None),
                data.get("-pdf-frame-border", border), x, y, w, h, data)