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from pint import formatting as fmt
from pint.testsuite import QuantityTestCase
class TestFormatter(QuantityTestCase):
def test_join(self):
for empty in (tuple(), []):
self.assertEqual(fmt._join("s", empty), "")
self.assertEqual(fmt._join("*", "1 2 3".split()), "1*2*3")
self.assertEqual(fmt._join("{0}*{1}", "1 2 3".split()), "1*2*3")
def test_formatter(self):
self.assertEqual(fmt.formatter(dict().items()), "")
self.assertEqual(fmt.formatter(dict(meter=1).items()), "meter")
self.assertEqual(fmt.formatter(dict(meter=-1).items()), "1 / meter")
self.assertEqual(
fmt.formatter(dict(meter=-1).items(), as_ratio=False), "meter ** -1"
)
self.assertEqual(
fmt.formatter(dict(meter=-1, second=-1).items(), as_ratio=False),
"meter ** -1 * second ** -1",
)
self.assertEqual(
fmt.formatter(dict(meter=-1, second=-1).items()), "1 / meter / second"
)
self.assertEqual(
fmt.formatter(dict(meter=-1, second=-1).items(), single_denominator=True),
"1 / (meter * second)",
)
self.assertEqual(
fmt.formatter(dict(meter=-1, second=-2).items()), "1 / meter / second ** 2"
)
self.assertEqual(
fmt.formatter(dict(meter=-1, second=-2).items(), single_denominator=True),
"1 / (meter * second ** 2)",
)
def test_parse_spec(self):
self.assertEqual(fmt._parse_spec(""), "")
self.assertEqual(fmt._parse_spec(""), "")
self.assertRaises(ValueError, fmt._parse_spec, "W")
self.assertRaises(ValueError, fmt._parse_spec, "PL")
def test_format_unit(self):
self.assertEqual(fmt.format_unit("", "C"), "dimensionless")
self.assertRaises(ValueError, fmt.format_unit, "m", "W")
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