def test_data_range_overlap_bad_types(self):
"""Test that we refuse to check type-mismatched DataRanges for overlap."""
strings = DataRange("cat", "horse")
scalars = DataRange(42, 45)
with self.assertRaises(TypeError) as context:
self.assertFalse(strings.overlaps(scalars))
self.assertIn(
'Only DataRanges of the same type (numeric or lexicographic)',
str(context.exception))
def test_data_range_no_overlap(self):
"""Test that we detect when DataRanges don't overlap."""
lesser = DataRange(1, 2)
greater = DataRange(3, 5)
self.assertFalse(lesser.overlaps(greater))
self.assertFalse(greater.overlaps(lesser))
def test_data_range_overlap_strings(self):
"""Test that we detect overlapping string DataRanges."""
lesser = DataRange("cat", "horse")
greater = DataRange("dog", "fish")
self.assertTrue(greater.overlaps(lesser))
def test_data_range_overlaps(self):
"""Test that we detect when DataRanges overlap."""
lesser = DataRange(1, None)
greater = DataRange(-4, 5)
self.assertTrue(lesser.overlaps(greater))
self.assertTrue(greater.overlaps(lesser))
