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_fields(self):
width = Steps(200)
height = Steps(300)
grid = Grid(width, height)
values = grid.width, grid.height
self.assertEqual(values, (width, height))
def test_len(self):
steps0 = Steps(0)
size0 = len(steps0)
steps3 = Steps(3)
size3 = len(steps3)
self.assertEqual(size0, 1)
self.assertEqual(size3, 4)
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_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_coercion(self):
tests = {
2: Steps(2),
3.1: Steps(3),
'4': Steps(4),
}
for wval, wexpected in tests.items():
for hval, hexpected in tests.items():
with self.subTest((wval, hval)):
grid = Grid(wval, hval)
width, height = grid.width, grid.height
self.assertEqual(width, wexpected)
self.assertEqual(height, hexpected)
def test_new_coercion(self):
values = [3, 3.1, '3']
for value in values:
with self.subTest(repr(value)):
steps = Steps(value)
self.assertEqual(steps, 3)
def test_contains_values(self):
steps = Steps(3)
for i in range(4):
with self.subTest(i):
contained = (i in steps)
self.assertTrue(contained)
contained = (-1 in steps)
self.assertFalse(contained)
contained = (4 in steps)
self.assertFalse(contained)
def test_contains_unsupported(self):
steps = Steps(3)
values = [
None,
object(),
'spam',
'1',
]
for value in values:
with self.subTest(repr(value)):
found = value in steps
self.assertFalse(found)
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_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_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_int(self):
steps = Steps(3)
isinstance(steps, int)
def test_reversed(self):
steps = Steps(3)
values = list(reversed(steps))
self.assertEqual(values, [3, 2, 1, 0])
def test_new_noop(self):
orig = Steps(3)
steps = Steps(orig)
self.assertIs(steps, orig)
def test_new_bad_num(self):
with self.assertRaises(TypeError):
Steps(object())
with self.assertRaises(ValueError):
Steps('')
def test_new_unsupported_num(self):
values = [1 + 1j]
for value in values:
with self.subTest(repr(value)):
with self.assertRaises(TypeError):
Steps(value)
def test_iter_floats_decreasing(self):
steps = Steps(7)
values = list(steps.iter_floats(2.5, -1.0))
self.assertEqual(values, [2.5, 2.0, 1.5, 1.0, 0.5, 0.0, -0.5, -1.0])
def test_iter_floats_increasing(self):
steps = Steps(3)
values = list(steps.iter_floats(0.0, 1.0))
self.assertEqual(values, [0.0, 1 / 3, 2 / 3, 1.0])
def test_defaults(self):
width = Steps(200)
grid = Grid(width)
height = grid.height
self.assertEqual(height, width)
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))
def test_validation(self):
with self.assertRaises(TypeError):
Steps(-1)
def test_iter(self):
steps = Steps(3)
values = list(steps)
self.assertEqual(values, [0, 1, 2, 3])
