def test_range_start_stop_step(self):
steps = Steps(3)
start = 2
tests = {
-4: {-16, -15, -14, -13},
-3: {-12, -11, -10},
-2: {-8, -7},
-1: {-4},
0: {},
1: {4},
2: {7, 8},
3: {10, 11, 12},
4: {13, 14, 15, 16},
}
for step in sorted(tests):
validstops = tests[step]
for base in range(-20, 21):
stop = base + start
with self.subTest((start, stop, step)):
if base in validstops:
r = steps.range(start=start, stop=stop, step=step)
self.assertEqual(r, range(start, stop, step))
self.assertEqual(len(r), len(steps))
else:
with self.assertRaises(ValueError):
steps.range(start=start, stop=stop, step=step)
def test_range_no_start_no_stop_step(self):
steps = Steps(3)
r_inc = steps.range(step=2)
r_dec = steps.range(step=-2)
self.assertEqual(r_inc, range(0, 8, 2))
self.assertEqual(len(r_inc), len(steps))
self.assertEqual(r_dec, range(0, -8, -2))
self.assertEqual(len(r_dec), len(steps))
def test_range_no_start_stop_step(self):
steps = Steps(3)
r_inc = steps.range(stop=3, step=2)
r_dec = steps.range(stop=3, step=-2)
self.assertEqual(r_inc, range(-5, 3, 2))
self.assertEqual(len(r_inc), len(steps))
self.assertEqual(r_dec, range(11, 3, -2))
self.assertEqual(len(r_dec), len(steps))
def test_range_no_start_stop_no_step(self):
steps = Steps(3)
r1 = steps.range(stop=3)
r2 = steps.range(stop=-3)
self.assertEqual(r1, range(-1, 3, 1))
self.assertEqual(len(r1), len(steps))
self.assertEqual(r2, range(-7, -3, 1))
self.assertEqual(len(r2), len(steps))
def test_range_start_stop_no_step_invalid(self):
steps = Steps(3)
start = 2
invalid = [
-9,
-6,
-5,
-3,
-2,
-1,
0,
1,
2,
3,
5,
6,
9,
]
for stop in invalid:
stop += start
with self.subTest((start, stop)):
with self.assertRaises(ValueError):
steps.range(start=start, stop=stop)
def test_range_start_stop_no_step_valid(self):
steps = Steps(3)
start = 2
tests = {
-5: [-18, -17, -16],
-4: [-15, -14, -13],
-3: [-12, -11, -10],
-2: [-8, -7],
-1: [-4],
1: [4],
2: [7, 8],
3: [10, 11, 12],
4: [13, 14, 15],
5: [16, 17, 18],
}
for step in sorted(tests):
for stop in tests[step]:
stop += start
with self.subTest((start, stop, step)):
r = steps.range(start=start, stop=stop)
self.assertEqual(r, range(start, stop, step))
self.assertEqual(len(r), len(steps))
def test_range_no_start_no_stop_no_step(self):
steps = Steps(3)
r = steps.range()
self.assertEqual(r, range(4))
self.assertEqual(len(r), len(steps))
def test_range_start_no_stop_step(self):
steps = Steps(3)
r = steps.range(start=4, step=2)
self.assertEqual(r, range(4, 12, 2))
self.assertEqual(len(r), len(steps))