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from paste.fixture import *
from paste.exceptions.errormiddleware import ErrorMiddleware
from paste import lint
from paste.util.quoting import strip_html
#
# For some strange reason, these 4 lines cannot be removed or the regression
# test breaks; is it counting the number of lines in the file somehow?
#
def do_request(app, expect_status=500):
app = lint.middleware(app)
app = ErrorMiddleware(app, {}, debug=True)
app = clear_middleware(app)
testapp = TestApp(app)
res = testapp.get('', status=expect_status,
expect_errors=True)
return res
def clear_middleware(app):
"""
The fixture sets paste.throw_errors, which suppresses exactly what
we want to test in this case. This wrapper also strips exc_info
on the *first* call to start_response (but not the second, or
subsequent calls.
"""
def clear_throw_errors(environ, start_response):
headers_sent = []
def replacement(status, headers, exc_info=None):
if headers_sent:
return start_response(status, headers, exc_info)
headers_sent.append(True)
return start_response(status, headers)
if 'paste.throw_errors' in environ:
del environ['paste.throw_errors']
return app(environ, replacement)
return clear_throw_errors
############################################################
## Applications that raise exceptions
############################################################
def bad_app():
"No argument list!"
return None
def unicode_bad_app(environ, start_response):
raise ValueError(u"\u1000")
def start_response_app(environ, start_response):
"raise error before start_response"
raise ValueError("hi")
def after_start_response_app(environ, start_response):
start_response("200 OK", [('Content-type', 'text/plain')])
raise ValueError('error2')
def iter_app(environ, start_response):
start_response("200 OK", [('Content-type', 'text/plain')])
return yielder(['this', ' is ', ' a', None])
def yielder(args):
for arg in args:
if arg is None:
raise ValueError("None raises error")
yield arg
############################################################
## Tests
############################################################
def test_makes_exception():
res = do_request(bad_app)
assert '<html' in res
res = strip_html(str(res))
#print res
assert 'bad_app() takes no arguments (2 given' in res
assert 'iterator = application(environ, start_response_wrapper)' in res
assert 'paste.lint' in res
assert 'paste.exceptions.errormiddleware' in res
def test_unicode_exception():
res = do_request(unicode_bad_app)
def test_start_res():
res = do_request(start_response_app)
res = strip_html(str(res))
assert 'ValueError: hi' in res
assert 'test_error_middleware' in res
assert ':52 in start_response_app' in res
def test_after_start():
res = do_request(after_start_response_app, 200)
res = strip_html(str(res))
#print res
assert 'ValueError: error2' in res
def test_iter_app():
res = do_request(lint.middleware(iter_app), 200)
#print res
assert 'None raises error' in res
assert 'yielder' in res
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