Tests fail on 32-bit

[QuLogic]

See this example build:

======================================================================
FAIL: test_dtype_default_integer (biggus.tests.unit.test_ConstantArray.Test___init__)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/builddir/build/BUILD/biggus-0.8.0/biggus/tests/unit/test_ConstantArray.py", line 75, in test_dtype_default_integer
    self.assertEqual(array.dtype, np.dtype('i8'))
AssertionError: dtype('int32') != dtype('int64')
----------------------------------------------------------------------

though I don't seem to see anything that might have changed here.

[pelson]

@QuLogic - this looks like the test is fragile to the arch. I suspect the problem is that numpy's int is arch dependent, and at no point are we being specific (https://github.com/SciTools/biggus/blob/master/biggus/tests/unit/test_ConstantArray.py#L74).

[QuLogic]

The odd thing is that I don't remember the problem occurring when building 0.6.0, but now when I try it, it also fails. I guess I'm just mis-remembering.

[QuLogic]

Looks like you're correct:

int_ Default integer type (same as C long; normally either int64 or int32)

[QuLogic]

I fixed this test by changing the aforementioned line to this:

-        self.assertEqual(array.dtype, np.dtype('i8'))
+        self.assertEqual(array.dtype, np.dtype(np.int_))

[pelson]

@QuLogic - would you mind submitting a PR?

[QuLogic]

Done.

[pelson]

Thanks @QuLogic!