def get_version(name: str) -> VersionRepresentation:
distro = _get_distro(name)
if distro is None:
raise DistributionNotFound(
f"Expected {name} to be installed but pkg_resources could not find it.\n"
f'Hint: Did you install "{name}" in the same Python environment as pysen?'
)
return VersionRepresentation.from_str(distro.version)
def test__version() -> None:
# version string MUST be in a format the VersionRepresentation understands
VersionRepresentation.from_str(__version__)
def check_version(s: str, expected: VersionRepresentation) -> None:
actual = VersionRepresentation.from_str(s)
assert actual == expected
assert s == str(expected)
def test_version_from_str() -> None:
def check_version(s: str, expected: VersionRepresentation) -> None:
actual = VersionRepresentation.from_str(s)
assert actual == expected
assert s == str(expected)
cases = {
("0.601", VersionRepresentation(0, 601)),
("3.0.8", VersionRepresentation(3, 0, 8)),
("3.6.8a1", VersionRepresentation(3, 6, 8, "a1")),
("3.6a1", VersionRepresentation(3, 6, None, "a1")),
("3.6b0", VersionRepresentation(3, 6, None, "b0")),
("3.6rc993", VersionRepresentation(3, 6, None, "rc993")),
}
for case in cases:
check_version(*case)
with pytest.raises(ValueError):
# prelease phase must be either a, b, or rc
VersionRepresentation.from_str("3.6.8alpha1")
with pytest.raises(ValueError):
# MUST have a pre-release number
VersionRepresentation.from_str("3.6.8a")
with pytest.raises(ValueError):
# MUST NOT start with zero followed by another number
VersionRepresentation.from_str("03.1")
with pytest.raises(ValueError):
# MUST NOT start with zero followed by another number
VersionRepresentation.from_str("00.1")
with pytest.raises(ValueError):
# MUST have minor
VersionRepresentation.from_str("3")
with pytest.raises(ValueError):
# too many dots
VersionRepresentation.from_str("3.0.100.1")
with pytest.raises(ValueError):
VersionRepresentation.from_str("3.")