Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
| From | Ian Collins <ian-news@hotmail.com> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Regression testing for pointers |
| Date | 2012-03-11 12:12 +1300 |
| Message-ID | <9s25e6Ff51U1@mid.individual.net> (permalink) |
| References | (4 earlier) <jjf5gt$n6m$1@speranza.aioe.org> <9s0o1eFtf6U7@mid.individual.net> <0.78c24e9ac9a5be00351c.20120310120052GMT.87zkbobr7v.fsf@bsb.me.uk> <9s218iFtf6U9@mid.individual.net> <0.7400ab73aa73069d73ee.20120310224025GMT.87haxw9j1i.fsf@bsb.me.uk> |
On 03/11/12 11:40 AM, Ben Bacarisse wrote:
> Ian Collins<ian-news@hotmail.com> writes:
>
>> On 03/11/12 01:00 AM, Ben Bacarisse wrote:
>>> Ian Collins<ian-news@hotmail.com> writes:
>>> <snip>
>>>> I don't see how a function like malloc is any different (form a unit
>>>> testing perspective) than any other.
>>>
>>> To take a simple well-know case (so I don't have to find a way to write
>>> the specification!) what would unit tests for strdup look like? In
>>> particular, it would be a bug if strdup returned a pointer to a region
>>> of memory that overlapped with one returned by any other allocating
>>> function or, indeed, by strdup itself. Now you may rule out testing for
>>> the former because this is, after all a *unit* test, but not,
>>> presumably, the latter.
>>
>> Well I guess you could rule out both by asserting strdup calls malloc.
>
> That would be to miss the point! Assume that strdup does not use
> malloc -- this is an environment where dynamic allocation is not
> permitted but we want to be able to copy some limited number of
> strings.
Um, OK. I was using the description in the Solaris man page:
The strdup() function returns a pointer to a new string that
is a duplicate of the string pointed to by s. The returned
pointer can be passed to free(). The space for the new
string is obtained using malloc(3C).
Given your caveat, I would first test the function that retuned the
memory and then carry on as before by asserting strdup calls that
function. I would then add tests to ensure the string was correctly
copied. This separates testing the memory management functionality from
the string copying.
See my earlier reply to "Don Y" for an example of how those tests would
be built.
--
Ian Collins
Back to comp.lang.c | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-09 16:43 -0700
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-10 12:56 +1300
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-09 19:40 -0700
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-10 17:53 +1300
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-10 18:12 +1300
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-10 02:05 -0700
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-10 23:17 +1300
Re: Regression testing for pointers Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-03-10 12:00 +0000
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-11 11:00 +1300
Re: Regression testing for pointers Ike Naar <ike@iceland.freeshell.org> - 2012-03-10 22:23 +0000
Re: Regression testing for pointers Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-03-10 22:40 +0000
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-11 12:12 +1300
Re: Regression testing for pointers Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-03-11 00:42 +0000
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-11 14:26 +1300
Re: Regression testing for pointers Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-03-11 03:09 +0000
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-11 18:16 +1300
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-10 12:01 -0700
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-11 10:35 +1300
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-12 09:19 -0700
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-13 07:23 +1300
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-12 16:23 -0700
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-13 17:25 +1300
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-13 00:19 -0700
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-13 20:34 +1300
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-13 01:00 -0700
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-13 21:22 +1300
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-13 10:19 -0700
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-14 07:25 +1300
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-14 02:00 -0700
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-14 22:18 +1300
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-14 11:32 -0700
Re: Regression testing for pointers nick_keighley_nospam@hotmail.com - 2012-03-15 05:58 -0700
Re: Regression testing for pointers nick_keighley_nospam@hotmail.com - 2012-03-15 05:55 -0700
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-15 11:32 -0700
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-16 18:14 +1300
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-20 01:43 -0700
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-20 21:59 +1300
Re: Regression testing for pointers nick_keighley_nospam@hotmail.com - 2012-03-16 03:05 -0700
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-20 02:33 -0700
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-24 11:49 +1300
Re: Regression testing for pointers nick_keighley_nospam@hotmail.com - 2012-03-11 05:01 -0700
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-11 09:44 -0700
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-12 09:56 +1300
Re: Regression testing for pointers nick_keighley_nospam@hotmail.com - 2012-03-10 02:28 -0800
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-10 11:09 -0700
Re: Regression testing for pointers Kaz Kylheku <kaz@kylheku.com> - 2012-03-10 18:29 +0000
Re: Regression testing for pointers nick_keighley_nospam@hotmail.com - 2012-03-11 05:22 -0700
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-11 09:50 -0700
Re: Regression testing for pointers "io_x" <a@b.c.invalid> - 2012-03-13 13:09 +0100
Re: Regression testing for pointers Kaz Kylheku <kaz@kylheku.com> - 2012-03-10 03:14 +0000
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-10 12:42 -0700
Re: Regression testing for pointers Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-03-10 08:42 +0000
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-10 02:19 -0700
Re: Regression testing for pointers "BartC" <bc@freeuk.com> - 2012-03-10 15:54 +0000
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-10 11:49 -0700
Re: Regression testing for pointers nick_keighley_nospam@hotmail.com - 2012-03-11 06:09 -0700
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-11 12:33 -0700
Re: Regression testing for pointers nick_keighley_nospam@hotmail.com - 2012-03-12 03:29 -0700
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-12 10:01 -0700
Re: Regression testing for pointers "BartC" <bc@freeuk.com> - 2012-03-13 18:56 +0000
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-13 16:31 -0700
Re: Regression testing for pointers Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-03-12 00:30 +0000
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-12 16:41 -0700
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-12 13:39 +1300
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-12 09:36 -0700
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-13 07:25 +1300
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-12 16:28 -0700
Re: Regression testing for pointers Kaz Kylheku <kaz@kylheku.com> - 2012-03-13 04:20 +0000
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-13 17:34 +1300
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-13 00:29 -0700
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-13 17:31 +1300
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-13 01:05 -0700
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-13 21:30 +1300
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-13 10:43 -0700
Re: Regression testing for pointers Malcolm McLean <malcolm.mclean5@btinternet.com> - 2012-03-10 15:41 -0800
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-11 11:23 -0700
Re: Regression testing for pointers Malcolm McLean <malcolm.mclean5@btinternet.com> - 2012-03-13 13:43 -0700
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-14 01:45 -0700
Re: Regression testing for pointers Malcolm McLean <malcolm.mclean5@btinternet.com> - 2012-03-14 15:15 -0700
Re: Regression testing for pointers Kaz Kylheku <kaz@kylheku.com> - 2012-03-14 22:57 +0000
Re: Regression testing for pointers Malcolm McLean <malcolm.mclean5@btinternet.com> - 2012-03-15 13:10 -0700
Re: Regression testing for pointers jgk@panix.com (Joe keane) - 2012-03-16 22:20 +0000
Re: Regression testing for pointers "io_x" <a@b.c.invalid> - 2012-03-18 07:15 +0100
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-14 23:13 -0700
Re: Regression testing for pointers gordonb.b29ri@burditt.org (Gordon Burditt) - 2012-03-12 19:37 -0500
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-12 19:23 -0700
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-14 13:12 +1300
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-14 01:54 -0700
Re: Regression testing for pointers Ian Collins <ian-news@hotmail.com> - 2012-03-14 22:05 +1300
Re: Regression testing for pointers Don Y <this@isnotme.com> - 2012-03-14 11:54 -0700
csiph-web