def test_comments(self):
# comments in expressions work accidentally, via an implementation
# detail - the '#' character doesn't match any of the regular
# expressions we specify as tokens, and thus are ignored.
# However, having explicit tests for them means that should the
# implementation ever change, comments continue to work, even if that
# means a new implementation must handle them explicitly.
self.assertTrue(parse("true == true # it does!"))
self.assertTrue(parse("false == false # it does"))
self.assertTrue(parse("false != true # it doesnt"))
self.assertTrue(parse('"string with #" == "string with #" # really, it does'))
self.assertTrue(parse('"string with #" != "string with # but not the same" # no match!'))
def test_basic(self):
self.assertEqual(parse("1"), 1)
self.assertEqual(parse("100"), 100)
self.assertEqual(parse("true"), True)
self.assertEqual(parse("false"), False)
self.assertEqual('', parse('""'))
self.assertEqual(parse('"foo bar"'), 'foo bar')
self.assertEqual(parse("'foo bar'"), 'foo bar')
self.assertEqual(parse("foo", foo=1), 1)
self.assertEqual(parse("bar", bar=True), True)
self.assertEqual(parse("abc123", abc123="xyz"), 'xyz')
def test_lesser_than(self):
"""
Test the < operator.
"""
self.assertTrue(parse("1 < 2"))
self.assertFalse(parse("3 < 2"))
self.assertTrue(parse("false || (1 < 2)"))
self.assertTrue(parse("1 < 2 && true"))
self.assertTrue(parse("true && 1 < 2"))
self.assertTrue(parse("!(5 < 1)"))
self.assertTrue(parse("'abc' < 'def'"))
self.assertFalse(parse("1 < 1"))
self.assertFalse(parse("'abc' < 'abc'"))
def test_greater_or_equals_than(self):
"""
Test the > operator.
"""
self.assertTrue(parse("2 >= 1"))
self.assertFalse(parse("2 >= 3"))
self.assertTrue(parse("false || (2 >= 1)"))
self.assertTrue(parse("2 >= 1 && true"))
self.assertTrue(parse("true && 2 >= 1"))
self.assertTrue(parse("!(1 >= 5)"))
self.assertTrue(parse("'def' >= 'abc'"))
self.assertTrue(parse("1 >= 1"))
self.assertTrue(parse("'abc' >= 'abc'"))
def test_lesser_or_equals_than(self):
"""
Test the <= operator.
"""
self.assertTrue(parse("1 <= 2"))
self.assertFalse(parse("3 <= 2"))
self.assertTrue(parse("false || (1 <= 2)"))
self.assertTrue(parse("1 < 2 && true"))
self.assertTrue(parse("true && 1 <= 2"))
self.assertTrue(parse("!(5 <= 1)"))
self.assertTrue(parse("'abc' <= 'def'"))
self.assertTrue(parse("1 <= 1"))
self.assertTrue(parse("'abc' <= 'abc'"))
def test_greater_than(self):
"""
Test the > operator.
"""
self.assertTrue(parse("2 > 1"))
self.assertFalse(parse("2 > 3"))
self.assertTrue(parse("false || (2 > 1)"))
self.assertTrue(parse("2 > 1 && true"))
self.assertTrue(parse("true && 2 > 1"))
self.assertTrue(parse("!(1 > 5)"))
self.assertTrue(parse("'def' > 'abc'"))
self.assertFalse(parse("1 > 1"))
self.assertFalse(parse("'abc' > 'abc'"))
def test_not(self):
"""
Test the ! operator.
"""
self.assertTrue(parse("!false"))
self.assertTrue(parse("!(false)"))
self.assertFalse(parse("!true"))
self.assertFalse(parse("!(true)"))
self.assertTrue(parse("!true || true)"))
self.assertTrue(parse("true || !true)"))
self.assertFalse(parse("!true && true"))
self.assertFalse(parse("true && !true"))
def test_parentheses(self):
self.assertTrue(parse("(true)"))
self.assertEqual(parse("(10)"), 10)
self.assertEqual(parse('("foo")'), 'foo')
self.assertEqual(parse("(foo)", foo=1), 1)
self.assertTrue(parse("(true == true)"), True)
self.assertTrue(parse("(true != false)"))
self.assertTrue(parse("(true && true)"))
self.assertTrue(parse("(true || false)"))
self.assertTrue(parse("(true && true || false)"))
self.assertFalse(parse("(true || false) && false"))
self.assertTrue(parse("(true || false) && true"))
self.assertTrue(parse("true && (true || false)"))
self.assertTrue(parse("true && (true || false)"))
self.assertTrue(parse("(true && false) || (true && (true || false))"))
def test_conjunctures(self):
self.assertTrue(parse("true && true"))
self.assertTrue(parse("true || false"))
self.assertFalse(parse("false || false"))
self.assertFalse(parse("true && false"))
self.assertTrue(parse("true || false && false"))
def test_equality(self):
self.assertTrue(parse("true == true"))
self.assertTrue(parse("false == false"))
self.assertTrue(parse("1 == 1"))
self.assertTrue(parse("100 == 100"))
self.assertTrue(parse('"some text" == "some text"'))
self.assertTrue(parse("true != false"))
self.assertTrue(parse("1 != 2"))
self.assertTrue(parse('"text" != "other text"'))
self.assertTrue(parse("foo == true", foo=True))
self.assertTrue(parse("foo == 1", foo=1))
self.assertTrue(parse('foo == "bar"', foo='bar'))
self.assertTrue(parse("foo == bar", foo=True, bar=True))
self.assertTrue(parse("true == foo", foo=True))
self.assertTrue(parse("foo != true", foo=False))
self.assertTrue(parse("foo != 2", foo=1))
self.assertTrue(parse('foo != "bar"', foo='abc'))
self.assertTrue(parse("foo != bar", foo=True, bar=False))
self.assertTrue(parse("true != foo", foo=False))
self.assertTrue(parse("!false"))
