为不同的测试目标配置鼻子测试

Question

我有一组鼻子测试，用于测试硬件。例如，下面的测试涉及测试系统上每种模式的警报：

import target

modes = ("start","stop","restart","stage1","stage2")
max_alarm_time = 10

# generate tests for testing each mode
def test_generator():
    for m in modes:
        yield check_alarm, m, max_alarm_time 

# test alarm for a mode
def check_alarm(m, max_alarm_time):
    target.set_mode(m)
    assert target.alarm() < max_alarm_time

我的大多数测试都有这种外观，我正在为系统上的所有modes 测试特定功能。

我现在希望使用同一组测试来测试具有两种额外模式的新硬件：

modes = ("start","stop","restart","stage1","stage2","stage3","stage4")

当然，我希望我的测试仍然适用于旧硬件。在运行自动化测试时，我需要对测试环境中连接的硬件进行硬编码。

我认为最好的方法是创建一个 paramaters.py 模块，如下所示：

def init(hardware):
    global max_alarm_time
    global modes
    max_alarm_time = 10
    if hardware == "old":
       modes = ("start","stop","restart","stage1","stage2")
    elif hardware == "new":
       modes = ("start","stop","restart","stage1","stage2","stage3","stage4")

test_alarms.py 现在看起来像这样：

import target
import parameters

# generate tests for testing each mode
def test_generator():
    for m in parameters.modes:
        yield check_alarm, m, parameters.max_alarm_time 

# test alarm for a mode
def check_alarm(m, max_alarm_time):
    target.set_mode(m)
    assert target.alarm() < max_alarm_time

然后在我的主要内容中，我有以下内容：

import nose
import parameters

parameters.init("new") 

nose.main()  

您认为这是一种有效的方法吗？

Answer 1

解决类似问题的另一种方法是通过以下方式滥用属性插件中的@attr 装饰器：

from nose.plugins.attrib import attr

max_alarm_time = 10

# generate tests for testing each mode
@attr(hardware='old')
@attr(modes = ("start","stop","restart","stage1","stage2"))
def test_generator_old():
    for m in test_generator_old.__dict__['modes']:
        yield check_alarm, m, max_alarm_time 

@attr(hardware='new')
@attr(modes = ("start","stop","restart","stage1","stage2", "stage3","stage4"))
def test_generator_new():
    for m in test_generator_new.__dict__['modes']:
        yield check_alarm, m, max_alarm_time 


# test alarm for a mode
def check_alarm(m, max_alarm_time):
    print "mode=", m

您可以立即在“旧”和“新”之间切换，如下所示：

$ nosetests modes_test.py -a hardware=new -v
modes_test.test_generator_new('start', 10) ... ok
modes_test.test_generator_new('stop', 10) ... ok
modes_test.test_generator_new('restart', 10) ... ok
modes_test.test_generator_new('stage1', 10) ... ok
modes_test.test_generator_new('stage2', 10) ... ok
modes_test.test_generator_new('stage3', 10) ... ok
modes_test.test_generator_new('stage4', 10) ... ok

----------------------------------------------------------------------
Ran 7 tests in 0.020s

OK

还有旧的： $鼻子测试模式_test.py -a hardware=old -v

modes_test.test_generator_old('start', 10) ... ok
modes_test.test_generator_old('stop', 10) ... ok
modes_test.test_generator_old('restart', 10) ... ok
modes_test.test_generator_old('stage1', 10) ... ok
modes_test.test_generator_old('stage2', 10) ... ok

----------------------------------------------------------------------
Ran 5 tests in 0.015s

OK

另外，虽然我玩的不多，nose-testconfig 可以帮助你做同样的伎俩。