def test_comment():
assert compile(Operator('comment', Either([]))) == asm.Literal('')
assert compile(Operator('comment', Literal('a'))) == asm.Literal('')
assert compile(Operator('comment',
Either([Literal('a'),
Literal('b')]))) == asm.Literal('')
assert compile(
Concat([
Macro('#sl'),
Operator('comment', Literal('yo')),
Macro('#el')
])) == asm.Concat([asm.Boundary('^', None),
asm.Boundary('$', None)])
def test_builtin_macros():
assert compile(Macro('#any')) == asm.ANY
not_linefeed = asm.CharacterClass([r'\n'], inverted=True)
assert compile(Macro('#not_linefeed')) == not_linefeed
assert compile(Macro('#nlf')) == not_linefeed
assert compile(Macro('#crlf')) == asm.Literal('\r\n')
assert compile(Concat([Macro('#sl'),
Literal('yo'),
Macro('#el')])) == asm.Concat([
asm.Boundary('^', None),
asm.Literal('yo'),
asm.Boundary('$', None)
])
def test_builtin_macros():
assert compile(Macro('#any')) == asm.ANY
not_linefeed = asm.CharacterClass([r'\n'], inverted=True)
assert compile(Macro('#not_linefeed')) == not_linefeed
assert compile(Macro('#not_linefeed')) == not_linefeed
assert compile(Macro('#windows_newline')) == asm.Literal('\r\n')
assert compile(Concat([Macro('#sl'),
Literal('yo'),
Macro('#el')])) == asm.Concat([
asm.Boundary('^', None),
asm.Literal('yo'),
asm.Boundary('$', None)
])
assert compile(Macro('#quote')) == asm.Literal("'")
assert compile(Macro('#double_quote')) == asm.Literal('"')
assert compile(Macro('#left_brace')) == asm.Literal("[")
assert compile(Macro('#right_brace')) == asm.Literal(']')
def test_def_scoping():
assert compile(Concat([Concat([Macro('#x')]),
Def('#x', Literal('x'))])) == asm.Literal('x')
with pytest.raises(CompileError):
compile(Concat([Concat([Def('#x', Literal('x'))]), Macro('#x')]))
def test_def():
assert compile(Concat([Def('#x', Literal('x')),
Macro('#x')])) == asm.Literal('x')
assert compile(Concat([Macro('#x'),
Def('#x', Literal('x'))])) == asm.Literal('x')
def test_nothing():
assert compile(Nothing()) == asm.Literal('')
assert compile(Concat([Nothing(), Nothing()])) == asm.Literal('')
def test_concat():
assert compile(Concat(map(Literal, 'abc'))) == asm.Concat(
[asm.Literal('a'),
asm.Literal('b'),
asm.Literal('c')])