unittest assertRaises Problem

[john]

All:

Hi. I am an experienced developer (15 yrs), but new to Python and have
a question re unittest and assertRaises. No matter what I raise,
assertRaises is never successful. Here is the test code:


class Foo:
def testException(s elf):
raise ValueError

class FooTestCase(uni ttest.TestCase) :

testTryThis(sel f):
f = Foo()
self.assertRais es(ValueError, f.testException ())

This fails --- unittest reports the following:
FAILED (errors=1)

This seems like the most basic thing in the world. I am running Python
2.5 on Windows XP using Eclipse and PyDev

Any help appreciated.

Thanks,
John

[attn.steven.kuo@gmail.com]

Re: unittest assertRaises Problem

On Apr 16, 3:13 pm, "john" <puop...@gmail. comwrote:

All:
>
Hi. I am an experienced developer (15 yrs), but new to Python and have
a question re unittest and assertRaises. No matter what I raise,
assertRaises is never successful. Here is the test code:
>
class Foo:
def testException(s elf):
raise ValueError
>
class FooTestCase(uni ttest.TestCase) :
>
testTryThis(sel f):
f = Foo()
self.assertRais es(ValueError, f.testException ())
>

The second argument should be a callable object, not the
result from invoking that callable object. Thus, change

self.assertRais es(ValueError, f.testException ())

to

self.assertRais es(ValueError, f.testException )

--
Hope this helps,
Steven

[john]

Re: unittest assertRaises Problem

On Apr 16, 6:35 pm, Jean-Paul Calderone <exar...@divmod .comwrote:

On 16 Apr 2007 15:13:42 -0700, john <puop...@gmail. comwrote:
>
>
>

All:

>

Hi. I am an experienced developer (15 yrs), but new to Python and have
a question re unittest and assertRaises. No matter what I raise,
assertRaises is never successful. Here is the test code:

>

class Foo:
def testException(s elf):
raise ValueError

>

class FooTestCase(uni ttest.TestCase) :

>

testTryThis(sel f):
f = Foo()
self.assertRais es(ValueError, f.testException ())

>
The 2nd argument to assertRaises should be a callable. assertRaises
will call it (so that it can do exception handling), so you shouldn't:
>
self.assertRais es(ValueError, f.testException )
>
Jean-Paul

Steven, Jean-Paul:

Thank you both for your answers - worked like a charm!

Best,
John