Extra test cases for Collection .intersect() and .disjoint()

[yackx]

Collection.intersect() was partly broken (or at least utterly inconsistent) between versions 2.4.2 and 2.4.6. Simple test case:

def foo = [[0, 0], [0, 1]]
def bar = [[0, 1], [1, 1]]
assert [[0, 1]] == foo.intersect(bar)

would fail in the aforementioned versions as [] would be returned. This is fixed in 2.4.7 but to avoid future regressions, it is nice to have test covering this case, as suggested by @glaforge and @sbglasius on Twitter.

A basic search didn't reveal any similar test cases (some Foo intersection comparison can be found but it can be seen as a different test case).

[jwagenleitner]

Thanks! More tests are always a good thing. 😄