def test_parse_empty():
rv = scan('()')
assert rv == List((), 0, 1)
rv = scan('(())')
assert rv == List((List((), 1, 2), ), 0, 3)
rv = scan('(() \t ()\r\n)')
assert rv == List((List((), 1, 2), List((), 6, 7)), 0, 10)
rv = scan('((()) ())')
assert rv == List((List((List((), 2, 3), ), 1, 4), List((), 6, 7)), 0, 8)
def test_parse_literals():
"""Test support for JSON literals."""
rv = scan(r'("foo \" \u0022 \/ \\ \b \f \n \r \t )(" "")')
assert rv == List((Literal('foo " " / \\ \b \f \n \r \t )(', 1,
39), Literal('', 41, 42)), 0, 43)
rv = scan('(null)')
assert rv == List((Literal(None, 1, 4), ), 0, 5)
rv = scan('(true false)')
assert rv == List((Literal(True, 1, 4), Literal(False, 6, 10)), 0, 11)
rv = scan('(0 -1 42)')
assert rv == List((Literal(0, 1, 1), Literal(-1, 3, 4), Literal(42, 6, 7)),
0, 8)
assert rv.args[1].value == -1 # pylint: disable=no-member
rv = scan('(1.2 -1e10 -1E+10 -1.42e-10)')
assert rv == List((Literal(1.2, 1, 3), Literal(
-1e10, 5, 9), Literal(-1e10, 11, 16), Literal(-1.42e-10, 18, 26)), 0,
27)
rv = scan('(-0.0)')
minus_one = math.copysign(1, rv.args[0].value) # pylint: disable=no-member
assert minus_one == -1
def test_parse_symbols():
rv = scan('(foo bar)')
assert rv == List((Identifier('foo', 1, 3), Identifier('bar', 5, 7)), 0, 8)
def test_reserved_word(string):
sexp = f'({string})'
with pytest.raises(ReservedWord):
scan(sexp)
def test_invalid_number(string):
sexp = f'({string})'
with pytest.raises(InvalidNumber):
scan(sexp)
def test_parse_malformed(): # pylint: disable=too-many-statements
sexp = ''
with pytest.raises(SexpError) as einfo:
scan(sexp)
assert einfo.value.args == ("Expected '('", sexp, 0)
sexp = ' '
with pytest.raises(SexpError) as einfo:
scan(sexp)
assert einfo.value.args == ("Expected '('", sexp, 0)
sexp = 'malformed'
with pytest.raises(SexpError) as einfo:
scan(sexp)
assert einfo.value.args == ("Expected '('", sexp, 0)
sexp = '('
with pytest.raises(SexpError) as einfo:
scan(sexp)
assert einfo.value.args == ('Unbalanced parentheses', sexp, -1)
sexp = r'("\q")'
with pytest.raises(InvalidStringEscape) as einfo:
scan(sexp)
assert einfo.value.args == (r'\q', sexp, 2)
sexp = r'("\u)'
with pytest.raises(InvalidStringEscape) as einfo:
scan(sexp)
assert einfo.value.args == (r'\u)', sexp, 2)
sexp = r'("\ux1234")'
with pytest.raises(InvalidStringEscape) as einfo:
scan(sexp)
assert einfo.value.args == (r'\ux123', sexp, 2)
sexp = '(-a)'
with pytest.raises(InvalidNumber) as einfo:
scan(sexp)
assert einfo.value.args == ('-a', sexp, 1)
sexp = '(")'
with pytest.raises(SexpError) as einfo:
scan(sexp)
assert einfo.value.args == ('Runaway string', sexp, 1)
sexp = '("foo)'
with pytest.raises(SexpError) as einfo:
scan(sexp)
assert einfo.value.args == ('Runaway string', sexp, 1)
sexp = '(()())'
with pytest.raises(SexpError) as einfo:
scan(sexp)
assert einfo.value.args == ('Missing space between tokens', sexp, 3)
sexp = '(() '
with pytest.raises(SexpError) as einfo:
scan(sexp)
assert einfo.value.args == ('Unbalanced parentheses', sexp, -1)
sexp = '(a'
with pytest.raises(SexpError) as einfo:
scan(sexp)
assert einfo.value.args == ('Unbalanced parentheses', sexp, -1)
sexp = '(1'
with pytest.raises(SexpError) as einfo:
scan(sexp)
assert einfo.value.args == ('Unbalanced parentheses', sexp, -1)
sexp = '(+)'
with pytest.raises(UnexpectedCharacter) as einfo:
scan(sexp)
assert einfo.value.args == ('+', sexp, 1)
sexp = '(01)'
with pytest.raises(InvalidNumber):
scan(sexp)
sexp = '(-01)'
with pytest.raises(InvalidNumber):
scan(sexp)
sexp = '(1-)'
with pytest.raises(Exception):
scan(sexp)
sexp = '(1\f\v\u2000\u2001)'
rv = scan(sexp)
assert rv.args[0].stop == 1 # pylint: disable=no-member
sexp = '(foo-bar)'
with pytest.raises(Exception):
scan(sexp)
def test_invalid_character(string):
sexp = f'("{chr(string)}")'
with pytest.raises(Exception):
scan(sexp)