[sage-devel] Testing corner cases

[Jori Mäntysalo]

I just play a little with Python. I think others might also benefit on 
this when testing corner cases like 0x0 or 1x1 matrices, 1-element groups 
and so on.

G = Graph()
known_kaboom = ['is_prime', 'layout_graphviz']
errors = []
for f in [y for y in dir(G) if y[0] != '_']:
    if f in known_kaboom:
        continue
    try:
        attrcall(f)(G)
    except TypeError as e:
        if "takes exactly" in e.message:
            continue
    except Exception as e:
        print(f, e)
        print
        errors.append(f)
        continue
errors
(This found that for example is_triangle_free() and is_cayley() fails. 
known_kaboom is needed as for example is_prime() don't just throw an 
exception, it stops the whole workseet.)

--
Jori Mäntysalo