def test_indent_block(block):
lines, indent_level = block
lvlc = indent_block(p_space_consumer=scn,
p_reference=symbol(symbol_c,
sc).result(IndentNone(symbol_c)))
lvlb = indent_block(p_space_consumer=scn,
p_reference=symbol(symbol_b, sc).result(
IndentSome(None, lambda l: (symbol_b, l), lvlc)))
lvla = indent_block(p_space_consumer=scn,
p_reference=symbol(symbol_a, sc).result(
IndentMany(indent_level, lambda l: (symbol_a, l),
lvlb)))
s = ''.join(lines)
p = lvla << parsy.eof
cols = [get_col(l) for l in lines]
if cols[1] <= cols[0]:
with pytest.raises(parsy.ParseError):
p.parse(s)
elif indent_level and cols[1] != indent_level:
with pytest.raises(parsy.ParseError):
p.parse(s)
elif cols[2] <= cols[1]:
with pytest.raises(parsy.ParseError):
p.parse(s)
elif cols[3] == cols[2]:
with pytest.raises(parsy.ParseError):
p.parse(s)
elif cols[3] <= cols[0]:
with pytest.raises(parsy.ParseError):
p.parse(s)
elif cols[3] < cols[1]:
with pytest.raises(parsy.ParseError):
p.parse(s)
elif cols[3] > cols[1]:
with pytest.raises(parsy.ParseError):
p.parse(s)
elif cols[4] <= cols[3]:
with pytest.raises(parsy.ParseError):
p.parse(s)
else:
val = p.parse(s)
assert val == (symbol_a, [
(symbol_b, [symbol_c]),
(symbol_b, [symbol_c]),
])
def test_indent_guard(lines):
sp = (symbol(symbol_a, sc) << char.eol).result('')
ip = partial(indent_guard, scn)
@parsy.generate
def p():
x = yield ip(operator.gt, 1)
return (
sp >> ip(operator.eq, x) >> sp >> ip(operator.gt, x) >> sp >> scn)
s = ''.join(lines)
cols = [get_col(l) for l in lines]
if cols[0] <= 1:
with pytest.raises(parsy.ParseError):
p.parse(s)
elif cols[1] != cols[0]:
with pytest.raises(parsy.ParseError):
p.parse(s)
elif cols[2] <= cols[0]:
with pytest.raises(parsy.ParseError):
p.parse(s)
else:
val = p.parse(s)
assert val == ''
def test_symbol():
"""
when stream begins with the symbol it parses the symbol and
trailing whitespace
"""
p = symbol('foo').many()
s = "foo foo\nfoo "
val = p.parse(s)
assert val == ['foo', 'foo', 'foo']
def test_non_indented(s):
"""
Returns the result of content-consuming parser if the start pos is indented
else raises ParseError
"""
p = non_indented(scn, symbol(symbol_a, scn))
i = get_indent(s)
if i == 0:
val = p.parse(s)
assert val == symbol_a
else:
with pytest.raises(parsy.ParseError):
p.parse(s)
def parser():
a = yield symbol(symbol_a, sc_)
b = yield symbol(symbol_b, sc_)
c = yield symbol(symbol_c, scn)
return a, b, c