def test_errorPropogation(self):
# A generator that raises an error
def gen(ctx, data):
yield 1
pop
yield 2
# Hacky imports
from cStringIO import StringIO
from nevow.flat import twist
# Simple context with None IData
ctx = context.WovenContext()
ctx.remember(None, inevow.IData)
# The actual test
notquiteglobals = {}
io = StringIO()
def finished(spam):
print 'FINISHED'
def error(failure):
notquiteglobals['exception'] = failure.value
def checker(result):
if not isinstance(notquiteglobals['exception'], NameError):
self.fail('deferflatten did not errback with the correct failure')
return result
d = twist.deferflatten(gen, ctx, io.write)
d.addCallback(finished)
d.addErrback(error)
d.addBoth(checker)
return d
def render_skin(ctx, data):
content = inevow.IQ(ctx.tag).onePattern('skincontent')
gather = tags.invisible()
d = deferflatten(content, ctx, gather.__getitem__)
def gotContent(s):
self.content = gather
return skin
d.addCallback(gotContent)
return d
def flatten(self, obj):
"""
Flatten the given object using L{twist.deferflatten} and a simple context.
Return the Deferred returned by L{twist.deferflatten}.
it.
"""
# Simple context with None IData
ctx = context.WovenContext()
ctx.remember(None, inevow.IData)
return twist.deferflatten(obj, ctx, lambda bytes: None)
def flatten(self, obj):
"""
Flatten the given object using L{twist.deferflatten} and a simple context.
Return the Deferred returned by L{twist.deferflatten}.
it.
"""
# Simple context with None IData
ctx = context.WovenContext()
ctx.remember(None, inevow.IData)
return twist.deferflatten(obj, ctx, lambda bytes: None)
def render(self, tag, precompile=False, data=None, setupRequest=lambda r: r, setupContext=lambda c:c, wantDeferred=False):
ctx = self.setupContext(precompile, setupRequest)
ctx = setupContext(ctx)
if precompile:
return flat.precompile(tag, ctx)
else:
if wantDeferred:
L = []
D = twist.deferflatten(tag, ctx, L.append)
D.addCallback(lambda igresult: ''.join(L))
return D
else:
return flat.flatten(tag, ctx)
def render(self, tag, precompile=False, data=None, setupRequest=lambda r: r, setupContext=lambda c:c, wantDeferred=False):
ctx = self.setupContext(precompile, setupRequest)
ctx = setupContext(ctx)
if precompile:
return flat.precompile(tag, ctx)
else:
if wantDeferred:
L = []
D = twist.deferflatten(tag, ctx, L.append)
D.addCallback(lambda igresult: ''.join(L))
return D
else:
return flat.flatten(tag, ctx)
def render(self, tag, precompile=False, data=None, setupRequest=lambda r: r, setupContext=lambda c:c):
ctx = self.setupContext(precompile, setupRequest)
ctx = setupContext(ctx)
if precompile:
return flat.precompile(tag, ctx)
else:
try:
from twisted.trial import util
from nevow.flat import twist
except ImportError:
return flat.flatten(tag, ctx)
else:
L = []
util.deferredResult(twist.deferflatten(tag, ctx, L.append))
return ''.join(L)
def test_renderNestedDeferredCallables(self):
"""
Test flattening of a renderer which returns a Deferred which fires with
a renderer which returns a Deferred.
"""
def render_inner(ctx, data):
return defer.succeed('')
def render_outer(ctx, data):
return defer.succeed(render_inner)
ctx = context.WovenContext()
ctx.remember(None, inevow.IData)
out = []
d = twist.deferflatten(render_outer, ctx, out.append)
def flattened(ign):
self.assertEqual(out, [''])
d.addCallback(flattened)
return d
def render(self,
tag,
precompile=False,
data=None,
setupRequest=lambda r: r,
setupContext=lambda c: c):
ctx = self.setupContext(precompile, setupRequest)
ctx = setupContext(ctx)
if precompile:
return flat.precompile(tag, ctx)
else:
try:
from twisted.trial import util
from nevow.flat import twist
except ImportError:
return flat.flatten(tag, ctx)
else:
L = []
util.deferredResult(twist.deferflatten(tag, ctx, L.append))
return ''.join(L)
def test_renderNestedDeferredErrorHandling(self):
"""
Test that flattening a renderer which returns a Deferred which fires
with a renderer which raises an exception causes the outermost Deferred
to errback.
"""
class NestedException(Exception):
pass
def render_inner(ctx, data):
raise NestedException()
def render_outer(ctx, data):
return defer.succeed(render_inner)
ctx = context.WovenContext()
ctx.remember(None, inevow.IData)
out = []
d = twist.deferflatten(render_outer, ctx, out.append)
return self.assertFailure(d, NestedException)
def test_errorPropogation(self):
# A generator that raises an error
def gen(ctx, data):
yield 1
raise Exception('This is an exception!')
yield 2
# Hacky imports
from cStringIO import StringIO
from nevow.flat import twist
# Simple context with None IData
ctx = context.WovenContext()
ctx.remember(None, inevow.IData)
# The actual test
notquiteglobals = {}
io = StringIO()
def finished(spam):
print 'FINISHED'
def error(failure):
notquiteglobals['exception'] = failure.value
def checker(result):
if not isinstance(notquiteglobals['exception'], Exception):
self.fail(
'deferflatten did not errback with the correct failure')
return result
d = twist.deferflatten(gen, ctx, io.write)
d.addCallback(finished)
d.addErrback(error)
d.addBoth(checker)
return d
def flattenFactory(stan, ctx, writer, finisher):
from nevow.flat.twist import deferflatten
return deferflatten(stan, ctx, writer).addCallback(finisher)
def flattenFactory(stan, ctx, writer, finisher):
from nevow.flat.twist import deferflatten
return deferflatten(stan, ctx, writer).addCallback(finisher)
