def test_set_cell_formula_with_empty_string_should_clear_internal_contents_if_they_exist(self):
ws = Worksheet()
ws[1, 2].formula = "=1"
ws.set_cell_formula(1, 2, "")
self.assertFalse((1, 2) in ws)
def test_set_cell_formula_with_empty_string_should_do_nothing_if_no_preexisting_internal_contents(self):
ws = Worksheet()
ws.set_cell_formula(1, 2, "")
self.assertFalse((1, 2) in ws)
def test_set_cell_formula_with_value_should_update_internal_contents(self):
ws = Worksheet()
ws.set_cell_formula(1, 2, "3")
self.assertEquals(ws[1, 2].formula, '3')
