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from paste.fixture import *
from paste.exceptions.errormiddleware import ErrorMiddleware
from paste import lint
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.
"""
def clear_throw_errors(environ, start_response):
def replacement(status, headers, exc_info=None):
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 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)
print res
assert '<html' in res
assert 'bad_app() takes no arguments (2 given' in res
assert 'iterator = application(environ, start_response_wrapper)' in res
assert 'lint.py' in res
assert 'errormiddleware.py' in res
def test_start_res():
res = do_request(start_response_app)
print res
assert 'ValueError: hi' in res
assert 'test_error_middleware.py' in res
assert 'line 38 in <tt>start_response_app</tt>' in res
def test_after_start():
res = do_request(after_start_response_app, 200)
print res
assert 'ValueError: error2' in res
assert 'line 42' in res
def test_iter_app():
res = do_request(iter_app, 200)
print res
assert 'None raises error' in res
assert 'yielder' in res
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