class PymlParserTest(unittest.TestCase):
# Input for parsing with a variable test_attribute to check your solutions
pyml = """
MainWindow {
test_attribute = %s;
Label {
Image {
path = "a.png";
}
}
Button {
text = "OK";
width = 60;
}
}
"""
# How the corresponding AST should look like after parsing:
ast_should = Widget('MainWindow', [None], [
Widget('Label', [], [
Widget('Image', [Attribute('path', 'a.png')], [])
]),
Widget('Button', [Attribute('text', 'OK'), Attribute('width', 60)], [])
])
def setUp(self):
self.parser = PymlParser()
def test_basic(self):
"""Check if parsing pyml works."""
self.check_test_attribute("4", 4)
def test_calculation_value(self):
"""
Check if parsing an attribute having a calculation as value works.
This test fails until you add support for calculation attribute values.
"""
should_value = Calculation(Number(1), Operator('+'), Number(2))
self.check_test_attribute("1 + 2", should_value)
def test_string_list_value(self):
"""
Check if parsing an attribute having a list of strings as value works.
This test fails until you add support for stringlist attribute values.
"""
self.check_test_attribute('["red", "green"]', ["red", "green"])
def check_test_attribute(self, input_value, should_value):
"""
Helper for parsing and checking pyml. Takes the pyml
input_value: string in pyml syntax for test_attribute's value
should_value: how the corresponding node should look like in the AST
"""
ast_is = self.parser.parse(self.pyml % input_value)
self.ast_should.attributes[0] = Attribute('test_attribute', should_value)
self.assertEqual(ast_is, self.ast_should)
def setUp(self):
self.parser = PymlParser()
