hy/tests/lex/test_lex.py

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# Copyright (c) 2013 Paul Tagliamonte <paultag@debian.org>
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#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
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from hy.models.expression import HyExpression
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from hy.models.integer import HyInteger
from hy.models.lambdalist import HyLambdaListKeyword
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from hy.models.float import HyFloat
from hy.models.complex import HyComplex
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from hy.models.symbol import HySymbol
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from hy.models.string import HyString
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from hy.models.dict import HyDict
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from hy.lex import LexException, PrematureEndOfInput, tokenize
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def test_lex_exception():
""" Ensure tokenize throws a fit on a partial input """
try:
tokenize("(foo")
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assert True is False
except PrematureEndOfInput:
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pass
try:
tokenize("{foo bar")
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assert True is False
except PrematureEndOfInput:
pass
try:
tokenize("(defn foo [bar]")
assert True is False
except PrematureEndOfInput:
pass
def test_unbalanced_exception():
"""Ensure the tokenization fails on unbalanced expressions"""
try:
tokenize("(bar))")
assert True is False
except LexException:
pass
try:
tokenize("(baz [quux]])")
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assert True is False
except LexException:
pass
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def test_lex_expression_symbols():
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""" Make sure that expressions produce symbols """
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objs = tokenize("(foo bar)")
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assert objs == [HyExpression([HySymbol("foo"), HySymbol("bar")])]
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def test_lex_expression_strings():
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""" Test that expressions can produce symbols """
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objs = tokenize("(foo \"bar\")")
assert objs == [HyExpression([HySymbol("foo"), HyString("bar")])]
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def test_lex_expression_integer():
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""" Make sure expressions can produce integers """
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objs = tokenize("(foo 2)")
assert objs == [HyExpression([HySymbol("foo"), HyInteger(2)])]
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def test_lex_lambda_list_keyword():
""" Make sure expressions can produce lambda list keywords """
objs = tokenize("(x &rest xs)")
assert objs == [HyExpression([HySymbol("x"),
HyLambdaListKeyword("&rest"),
HySymbol("xs")])]
def test_lex_symbols():
""" Make sure that symbols are valid expressions"""
objs = tokenize("foo ")
assert objs == [HySymbol("foo")]
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def test_lex_strings():
""" Make sure that strings are valid expressions"""
objs = tokenize("\"foo\" ")
assert objs == [HyString("foo")]
def test_lex_integers():
""" Make sure that integers are valid expressions"""
objs = tokenize("42 ")
assert objs == [HyInteger(42)]
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def test_lex_expression_float():
""" Make sure expressions can produce floats """
objs = tokenize("(foo 2.)")
assert objs == [HyExpression([HySymbol("foo"), HyFloat(2.)])]
objs = tokenize("(foo -0.5)")
assert objs == [HyExpression([HySymbol("foo"), HyFloat(-0.5)])]
objs = tokenize("(foo 1.e7)")
assert objs == [HyExpression([HySymbol("foo"), HyFloat(1.e7)])]
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def test_lex_expression_complex():
""" Make sure expressions can produce complex """
objs = tokenize("(foo 2.j)")
assert objs == [HyExpression([HySymbol("foo"), HyComplex(2.j)])]
objs = tokenize("(foo -0.5j)")
assert objs == [HyExpression([HySymbol("foo"), HyComplex(-0.5j)])]
objs = tokenize("(foo 1.e7j)")
assert objs == [HyExpression([HySymbol("foo"), HyComplex(1.e7j)])]
objs = tokenize("(foo j)")
assert objs == [HyExpression([HySymbol("foo"), HySymbol("j")])]
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def test_lex_line_counting():
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""" Make sure we can count lines / columns """
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entry = tokenize("(foo (one two))")[0]
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assert entry.start_line == 1
assert entry.start_column == 1
assert entry.end_line == 1
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assert entry.end_column == 15
entry = entry[1]
assert entry.start_line == 1
assert entry.start_column == 6
assert entry.end_line == 1
assert entry.end_column == 14
def test_lex_line_counting_multi():
""" Make sure we can do multi-line tokenization """
entries = tokenize("""
(foo (one two))
(foo bar)
""")
entry = entries[0]
assert entry.start_line == 2
assert entry.start_column == 1
assert entry.end_line == 2
assert entry.end_column == 15
entry = entries[1]
assert entry.start_line == 3
assert entry.start_column == 1
assert entry.end_line == 3
assert entry.end_column == 9
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def test_lex_line_counting_multi_inner():
""" Make sure we can do multi-line tokenization (inner) """
entry = tokenize("""(foo
bar)""")[0]
inner = entry[0]
assert inner.start_line == 1
assert inner.start_column == 2
inner = entry[1]
assert inner.start_line == 2
assert inner.start_column == 5
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def test_dicts():
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""" Ensure that we can tokenize a dict. """
objs = tokenize("{foo bar bar baz}")
assert objs == [HyDict(["foo", "bar", "bar", "baz"])]
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objs = tokenize("(bar {foo bar bar baz})")
assert objs == [HyExpression([HySymbol("bar"),
HyDict(["foo", "bar",
"bar", "baz"])])]
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objs = tokenize("{(foo bar) (baz quux)}")
assert objs == [HyDict([
HyExpression([HySymbol("foo"), HySymbol("bar")]),
HyExpression([HySymbol("baz"), HySymbol("quux")])
])]
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def test_nospace():
""" Ensure we can tokenize without spaces if we have to """
entry = tokenize("(foo(one two))")[0]
assert entry.start_line == 1
assert entry.start_column == 1
assert entry.end_line == 1
assert entry.end_column == 14
entry = entry[1]
assert entry.start_line == 1
assert entry.start_column == 5
assert entry.end_line == 1
assert entry.end_column == 13
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def test_escapes():
""" Ensure we can escape things """
entry = tokenize("(foo \"foo\\n\")")[0]
assert entry[1] == "foo\n"
entry = tokenize("(foo \"foo\s\")")[0]
assert entry[1] == "foo\\s"
def test_unicode_escapes():
"""Ensure unicode escapes are handled correctly"""
s = r'"a\xac\u1234\u20ac\U00008000"'
assert len(s) == 29
entry = tokenize(s)[0]
assert len(entry) == 5
assert [ord(x) for x in entry] == [97, 172, 4660, 8364, 32768]
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def test_hashbang():
""" Ensure we can escape things """
entry = tokenize("#!this is a comment\n")
assert entry == []
def test_complex():
"""Ensure we tokenize complex numbers properly"""
# This is a regression test for #143
entry = tokenize("(1j)")[0][0]
assert entry == HyComplex("1.0j")
entry = tokenize("(j)")[0][0]
assert entry == HySymbol("j")
def test_reader_macro():
"""Ensure reader macros are handles properly"""
entry = tokenize("#^()")
assert entry[0][0] == HySymbol("dispatch_reader_macro")
assert entry[0][1] == HyExpression([HySymbol("quote"), HyString("^")])
assert len(entry[0]) == 3
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def test_lex_comment_382():
"""Ensure that we can tokenize sources with a comment at the end"""
entry = tokenize("foo ;bar\n;baz")
assert entry == [HySymbol("foo")]