[SciPy-Dev] Generator tests
Pauli Virtanen
pav at iki.fi
Fri Jul 13 05:57:01 EDT 2012
Ralf Gommers <ralf.gommers <at> googlemail.com> writes:
[clip]
> in the test or code. Plus, it once again shows how
> annoying generator tests are; can't see which method is
> failing.
Here's a recommendation for generator test:
- No computation related to the features tested should be
done in the test_* generator function, but delegated to
a corresponding _check_* function (can be inside the
generator, to share namespace).
- The generators should be used *solely* for loops over parameters.
- These parameters should *not* be arrays.
If a parameter is "complicated", as in the case of ARPACK
tests, wrap it into a class with a descriptive __repr__ method.
Like so:
def test_foo():
x = [1, 2, 3]
z = 9
def check(a, b):
x = a + b + z
y = a - b + z
assert x == y + 2*b
for a in [1, 2, 3]:
for b in [4, 5, 6]:
yield check, a, b
--
Pauli Virtanen
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