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前往新版Gitcode,体验更适合开发者的 AI 搜索 >>
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6ed9440e
编写于
6月 30, 2018
作者:
E
Eugenio Lacuesta
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差异文件
Tests for exceptions on spider callbacks
上级
735de816
变更
1
隐藏空白更改
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并排
Showing
1 changed file
with
66 addition
and
6 deletion
+66
-6
tests/test_spider_mw.py
tests/test_spider_mw.py
+66
-6
未找到文件。
tests/test_spider_mw.py
浏览文件 @
6ed9440e
...
...
@@ -60,11 +60,11 @@ class ProcessSpiderInputSpider(Spider):
class
FailProcessSpiderInputMiddleware
:
def
process_spider_input
(
self
,
response
,
spider
):
logging
.
warn
(
'Middleware: will raise
ZeroDivision
Error'
)
raise
ZeroDivision
Error
()
logging
.
warn
(
'Middleware: will raise
Index
Error'
)
raise
Index
Error
()
class
TestProcessSpiderInput
Spider
(
CommonTestCase
):
class
TestProcessSpiderInput
(
CommonTestCase
):
@
defer
.
inlineCallbacks
def
test_process_spider_input_errback
(
self
):
"""
...
...
@@ -72,6 +72,66 @@ class TestProcessSpiderInputSpider(CommonTestCase):
process_spider_exception chain, it should go directly to the Request errback
"""
log
=
yield
self
.
crawl_log
(
ProcessSpiderInputSpider
)
self
.
assertNotIn
(
'Middleware: ZeroDivisionError exception caught'
,
str
(
log
))
self
.
assertIn
(
'Middleware: will raise ZeroDivisionError'
,
str
(
log
))
self
.
assertIn
(
'Got a Failure on the Request errback'
,
str
(
log
))
self
.
assertNotIn
(
"Middleware: IndexError exception caught"
,
str
(
log
))
self
.
assertIn
(
"Middleware: will raise IndexError"
,
str
(
log
))
self
.
assertIn
(
"Got a Failure on the Request errback"
,
str
(
log
))
# ================================================================================
# (2) exceptions from a spider callback (generator)
class
GeneratorCallbackSpider
(
Spider
):
name
=
'GeneratorCallbackSpider'
start_urls
=
[
'http://localhost:8998'
]
custom_settings
=
{
'SPIDER_MIDDLEWARES'
:
{
# spider
__name__
+
'.LogExceptionMiddleware'
:
10
,
# engine
},
}
def
parse
(
self
,
response
):
yield
{
'test'
:
1
}
yield
{
'test'
:
2
}
raise
ImportError
()
class
TestGeneratorCallback
(
CommonTestCase
):
@
defer
.
inlineCallbacks
def
test_generator_callback
(
self
):
"""
(2) An exception from a spider's callback should
be caught by the process_spider_exception chain
"""
log
=
yield
self
.
crawl_log
(
GeneratorCallbackSpider
)
self
.
assertIn
(
"Middleware: ImportError exception caught"
,
str
(
log
))
self
.
assertIn
(
"'item_scraped_count': 2"
,
str
(
log
))
# ================================================================================
# (3) exceptions from a spider callback (not a generator)
class
NotAGeneratorCallbackSpider
(
Spider
):
name
=
'NotAGeneratorCallbackSpider'
start_urls
=
[
'http://localhost:8998'
]
custom_settings
=
{
'SPIDER_MIDDLEWARES'
:
{
# spider
__name__
+
'.LogExceptionMiddleware'
:
10
,
# engine
},
}
def
parse
(
self
,
response
):
return
[{
'test'
:
1
},
{
'test'
:
1
/
0
}]
class
TestNotAGeneratorCallback
(
CommonTestCase
):
@
defer
.
inlineCallbacks
def
test_not_a_generator_callback
(
self
):
"""
(3) An exception from a spider's callback should
be caught by the process_spider_exception chain
"""
log
=
yield
self
.
crawl_log
(
NotAGeneratorCallbackSpider
)
self
.
assertIn
(
"Middleware: ZeroDivisionError exception caught"
,
str
(
log
))
self
.
assertNotIn
(
"item_scraped_count"
,
str
(
log
))
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