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import pickle
import re
from traceback import format_exception
import pytest
from jinja2 import ChoiceLoader
from jinja2 import DictLoader
from jinja2 import Environment
from jinja2 import TemplateSyntaxError
@pytest.fixture
def fs_env(filesystem_loader):
"""returns a new environment."""
return Environment(loader=filesystem_loader)
class TestDebug:
def assert_traceback_matches(self, callback, expected_tb):
with pytest.raises(Exception) as exc_info:
callback()
tb = format_exception(exc_info.type, exc_info.value, exc_info.tb)
m = re.search(expected_tb.strip(), "".join(tb))
assert (
m is not None
), f"Traceback did not match:\n\n{''.join(tb)}\nexpected:\n{expected_tb}"
def test_runtime_error(self, fs_env):
def test():
tmpl.render(fail=lambda: 1 / 0)
tmpl = fs_env.get_template("broken.html")
self.assert_traceback_matches(
test,
r"""
File ".*?broken.html", line 2, in (top-level template code|<module>)
\{\{ fail\(\) \}\}(
\^{12})?
File ".*debug?.pyc?", line \d+, in <lambda>
tmpl\.render\(fail=lambda: 1 / 0\)(
~~\^~~)?
ZeroDivisionError: (int(eger)? )?division (or modulo )?by zero
""",
)
def test_syntax_error(self, fs_env):
# The trailing .*? is for PyPy 2 and 3, which don't seem to
# clear the exception's original traceback, leaving the syntax
# error in the middle of other compiler frames.
self.assert_traceback_matches(
lambda: fs_env.get_template("syntaxerror.html"),
"""(?sm)
File ".*?syntaxerror.html", line 4, in (template|<module>)
\\{% endif %\\}.*?
(jinja2\\.exceptions\\.)?TemplateSyntaxError: Encountered unknown tag 'endif'. Jinja \
was looking for the following tags: 'endfor' or 'else'. The innermost block that needs \
to be closed is 'for'.
""",
)
def test_regular_syntax_error(self, fs_env):
def test():
raise TemplateSyntaxError("wtf", 42)
self.assert_traceback_matches(
test,
r"""
File ".*debug.pyc?", line \d+, in test
raise TemplateSyntaxError\("wtf", 42\)(
\^{36})?
(jinja2\.exceptions\.)?TemplateSyntaxError: wtf
line 42""",
)
def test_pickleable_syntax_error(self, fs_env):
original = TemplateSyntaxError("bad template", 42, "test", "test.txt")
unpickled = pickle.loads(pickle.dumps(original))
assert str(original) == str(unpickled)
assert original.name == unpickled.name
def test_include_syntax_error_source(self, filesystem_loader):
e = Environment(
loader=ChoiceLoader(
[
filesystem_loader,
DictLoader({"inc": "a\n{% include 'syntaxerror.html' %}\nb"}),
]
)
)
t = e.get_template("inc")
with pytest.raises(TemplateSyntaxError) as exc_info:
t.render()
assert exc_info.value.source is not None
def test_local_extraction(self):
from jinja2.debug import get_template_locals
from jinja2.runtime import missing
locals = get_template_locals(
{
"l_0_foo": 42,
"l_1_foo": 23,
"l_2_foo": 13,
"l_0_bar": 99,
"l_1_bar": missing,
"l_0_baz": missing,
}
)
assert locals == {"foo": 13, "bar": 99}
def test_get_corresponding_lineno_traceback(self, fs_env):
tmpl = fs_env.get_template("test.html")
assert tmpl.get_corresponding_lineno(1) == 1
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