1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
# Copyright (c) 2009 Jonathan M. Lange. See LICENSE for details.
"""Individual test case execution."""
__metaclass__ = type
__all__ = [
'RunTest',
]
import sys
from testtools.testresult import ExtendedToOriginalDecorator
class RunTest:
"""An object to run a test.
RunTest objects are used to implement the internal logic involved in
running a test. TestCase.__init__ stores _RunTest as the class of RunTest
to execute. Passing the runTest= parameter to TestCase.__init__ allows a
different RunTest class to be used to execute the test.
Subclassing or replacing RunTest can be useful to add functionality to the
way that tests are run in a given project.
:ivar case: The test case that is to be run.
:ivar result: The result object a case is reporting to.
:ivar handlers: A list of (ExceptionClass->handler code) for exceptions
that should be caught if raised from the user code. Exceptions that
are caught are checked against this list in first to last order.
There is a catchall of Exception at the end of the list, so to add
a new exception to the list, insert it at the front (which ensures that
it will be checked before any existing base classes in the list. If you
add multiple exceptions some of which are subclasses of each other, add
the most specific exceptions last (so they come before their parent
classes in the list).
:ivar exception_caught: An object returned when _run_user catches an
exception.
"""
def __init__(self, case, handlers=None):
"""Create a RunTest to run a case.
:param case: A testtools.TestCase test case object.
:param handlers: Exception handlers for this RunTest. These are stored
in self.handlers and can be modified later if needed.
"""
self.case = case
self.handlers = handlers or []
self.exception_caught = object()
def run(self, result=None):
"""Run self.case reporting activity to result.
:param result: Optional testtools.TestResult to report activity to.
:return: The result object the test was run against.
"""
if result is None:
actual_result = self.case.defaultTestResult()
actual_result.startTestRun()
else:
actual_result = result
try:
return self._run_one(actual_result)
finally:
if result is None:
actual_result.stopTestRun()
def _run_one(self, result):
"""Run one test reporting to result.
:param result: A testtools.TestResult to report activity to.
This result object is decorated with an ExtendedToOriginalDecorator
to ensure that the latest TestResult API can be used with
confidence by client code.
:return: The result object the test was run against.
"""
return self._run_prepared_result(ExtendedToOriginalDecorator(result))
def _run_prepared_result(self, result):
"""Run one test reporting to result.
:param result: A testtools.TestResult to report activity to.
:return: The result object the test was run against.
"""
result.startTest(self.case)
self.result = result
try:
self._run_core()
finally:
result.stopTest(self.case)
return result
def _run_core(self):
"""Run the user supplied test code."""
if self.exception_caught == self._run_user(self.case._run_setup,
self.result):
# Don't run the test method if we failed getting here.
self.case._runCleanups(self.result)
return
# Run everything from here on in. If any of the methods raise an
# exception we'll have failed.
failed = False
try:
if self.exception_caught == self._run_user(
self.case._run_test_method, self.result):
failed = True
finally:
try:
if self.exception_caught == self._run_user(
self.case._run_teardown, self.result):
failed = True
finally:
try:
if not self._run_user(
self.case._runCleanups, self.result):
failed = True
finally:
if not failed:
self.result.addSuccess(self.case,
details=self.case.getDetails())
def _run_user(self, fn, *args):
"""Run a user supplied function.
Exceptions are processed by self.handlers.
"""
try:
return fn(*args)
except KeyboardInterrupt:
raise
except Exception:
# Note that bare exceptions are not caught, so raised strings will
# escape: but they are deprecated anyway.
exc_info = sys.exc_info()
e = exc_info[1]
for exc_class, handler in self.handlers:
self.case.onException(exc_info)
if isinstance(e, exc_class):
handler(self.case, self.result, e)
return self.exception_caught
raise e
|
