def test_to_engstr(self):
val = 123456789
actual = misc.to_engstr(val)
desired = "123.5e6"
self.assertEqual(actual, desired)
val = -98765e-8
actual = misc.to_engstr(val)
desired = "-987.7e-6"
self.assertEqual(actual, desired)
def test_to_engstr_digits(self):
val = 123456
digits = 2
actual = misc.to_engstr(val, digits=digits)
desired = "12e3"
self.assertEqual(actual, desired)
digits = 5
actual = misc.to_engstr(val, digits=digits)
desired = "123.46e3"
self.assertEqual(actual, desired)
def test_to_engstr_larger_than_milli(self):
val = 123.456e-3
actual = misc.to_engstr(val)
desired = "0.1235"
self.assertEqual(actual, desired)
def test_to_engstr_smaller_than_kilo(self):
val = 123.456
actual = misc.to_engstr(val)
desired = "123.5"
self.assertEqual(actual, desired)
def test_to_engstr_zero(self):
eps = 1e-8
vals = (0.0, 1e-1 * eps, -1e-1 * eps)
for val in vals:
self.assertEqual(misc.to_engstr(val, eps=eps), "0")