class MaskStackTests(TestCase):
"""Tests for functions in the mask_stack module."""
def setUp(self):
"""Initialize data used in the tests."""
self.length = 100
self.unmasked_arr = np.array(range(self.length))
self.mask_stack = MaskStack(self.length)
def test_get_aggregate_mask(self):
"""
Test generating the aggregate mask.
"""
def test_masked_arr(expected_arr):
mask = self.mask_stack.get_aggregate_mask()
self.assertEqual(len(mask), self.length)
masked_arr = self.unmasked_arr[mask]
#I don't seem to be able to check equality of two arrays
self.assertEqual(list(masked_arr), list(expected_arr))
#the mask stack shouldn't do anything before we push onto it
test_masked_arr(self.unmasked_arr)
#push a mask, make sure the result is what we expect
first_mask = np.array(range(0, 100, 5))
self.mask_stack.push_mask(first_mask)
first_expected_arr = np.array(
[self.unmasked_arr[i] for i in range(self.length) if not i in first_mask])
test_masked_arr(first_expected_arr)
#push another mask, check the result
second_mask = np.array(range(0, len(first_expected_arr), 3))
self.mask_stack.push_mask(second_mask)
second_expected_arr = np.array(
[first_expected_arr[i] for i in range(len(first_expected_arr)) if not i in second_mask])
test_masked_arr(second_expected_arr)
#pop off the second mask, should be the same as when we added the first
self.mask_stack.pop_mask()
test_masked_arr(first_expected_arr)
#pop off the first mask, should be an empty stack again
self.mask_stack.pop_mask()
test_masked_arr(self.unmasked_arr)
def setUp(self):
"""Initialize data used in the tests."""
self.length = 100
self.unmasked_arr = np.array(range(self.length))
self.mask_stack = MaskStack(self.length)