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from edify import Pattern
from edify.atoms import nibble
def _anchored():
return Pattern().start_of_input().use(nibble).end_of_input()
def test_accepts_sample_from_shape():
assert _anchored()("a")
def test_rejects_off_shape_input():
assert not _anchored()("g")
def test_atom_composes_inside_a_larger_pattern():
embedded = Pattern().start_of_input().string("v=").use(nibble).end_of_input()
assert embedded("v=" + "a")
assert not embedded("a")
def test_atom_regex_string_is_non_empty():
fragment = nibble.to_regex_string()
assert fragment
assert isinstance(fragment, str)
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