测试功能与Google App Engine`文件`api
我有一个使用Google Blobstore API的函数,下面是一个退化的例子:
#!/usr/bin/python
from google.appengine.ext import testbed
def foo():
from google.appengine.api import files
blob_filename = files.blobstore.create(mime_type='text/plain')
with files.open(blob_filename, 'a') as googfile:
googfile.write("Test data")
files.finalize(blob_filename)
tb = testbed.Testbed()
tb.activate()
tb.init_blobstore_stub()
foo() # in reality, I'm a function called from a 'faux client'
# in a unittest testcase.
产生的错误是:
Traceback (most recent call last): File "e.py", line 18, in foo() # in reality, I'm a function called from a 'faux client' File "e.py", line 8, in foo blob_filename = files.blobstore.create(mime_type='text/plain') File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/files/blobstore.py", line 68, in create return files._create(_BLOBSTORE_FILESYSTEM, params=params) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/files/file.py", line 491, in _create _make_call('Create', request, response) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/files/file.py", line 230, in _make_call rpc = _create_rpc(deadline=deadline) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/files/file.py", line 213, in _create_rpc return apiproxy_stub_map.UserRPC('file', deadline) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/apiproxy_stub_map.py", line 393, in __init__ self.__rpc = CreateRPC(service, stubmap) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/apiproxy_stub_map.py", line 67, in CreateRPC assert stub, 'No api proxy found for service "%s"' % service AssertionError: No api proxy found for service "file"
我不想修改foo
以便能够测试它。 在Google App Engine的单元测试中,有没有办法让foo
按预期工作(即创建给定的文件)?
我希望能够通过Google的API代理实现这一点,但我不能很好地理解我自己的想法。
我会很感激你的想法和建议。
谢谢阅读。
看起来好像testbed.init_blobstore_stub()
已经过时了,因为dev_appserver
不同的方式存在blobstore存根。 这里是我的init_blobstore_stub
实现,它允许你在测试中写入和读取blobstore。
from google.appengine.ext import testbed
from google.appengine.api.blobstore import blobstore_stub, file_blob_storage
from google.appengine.api.files import file_service_stub
class TestbedWithFiles(testbed.Testbed):
def init_blobstore_stub(self):
blob_storage = file_blob_storage.FileBlobStorage('/tmp/testbed.blobstore',
testbed.DEFAULT_APP_ID)
blob_stub = blobstore_stub.BlobstoreServiceStub(blob_storage)
file_stub = file_service_stub.FileServiceStub(blob_storage)
self._register_stub('blobstore', blob_stub)
self._register_stub('file', file_stub)
# Your code...
def foo():
from google.appengine.api import files
blob_filename = files.blobstore.create(mime_type='text/plain')
with files.open(blob_filename, 'a') as googfile:
googfile.write("Test data")
files.finalize(blob_filename)
tb = TestbedWithFiles()
tb.activate()
tb.init_blobstore_stub()
foo()
任何尝试使用gaeunit.py测试运行器执行此操作的机会? 我在使用它时看到了相同的错误,因为它是自己的代码来替换api代理。
当我将'file'添加到gaeunit.py的_run_test_suite函数中的“原样”代理列表中时,该错误消失。
老实说,我不确定是否需要gaeunit.py代理替换代码,因为我还使用了http://code.google.com/appengine/docs中测试用例中最近推荐的测试代码/python/tools/localunittesting.html。 所以,在这一点上,我已经评论了所有的gaeunit.py,这似乎也在工作。
请注意,我只在开发服务器上完成所有这些工作,在python27的高度实验模式下使用Python 2.7进行GAE。
希望这可以帮助。
我不知道它是否稍后添加到SDK中,但使用Testbed.init_files_stub
应该修复它:
tb = testbed.Testbed()
tb.activate()
tb.init_blobstore_stub()
tb.init_files_stub()
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