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"""Trie tests."""
from itertools import permutations
from tldextract.tldextract import Trie
def test_nested_dict() -> None:
"""Test Trie class, built from a list of dot-delimited strings."""
suffixes = ["a", "d.a", "b.a", "c.b.a", "c", "b.c", "f.d"]
for suffixes_sequence in permutations(suffixes):
trie = Trie()
for suffix in suffixes_sequence:
trie.add_suffix(suffix)
# check each nested value
# Top level c
assert "c" in trie.matches
top_c = trie.matches["c"]
assert len(top_c.matches) == 1
assert "b" in top_c.matches
assert top_c.end
# Top level a
assert "a" in trie.matches
top_a = trie.matches["a"]
assert len(top_a.matches) == 2
# a -> d
assert "d" in top_a.matches
a_to_d = top_a.matches["d"]
assert not a_to_d.matches
# a -> b
assert "b" in top_a.matches
a_to_b = top_a.matches["b"]
assert a_to_b.end
assert len(a_to_b.matches) == 1
# a -> b -> c
assert "c" in a_to_b.matches
a_to_b_to_c = a_to_b.matches["c"]
assert not a_to_b_to_c.matches
assert top_a.end
# d -> f
assert "d" in trie.matches
top_d = trie.matches["d"]
assert not top_d.end
assert "f" in top_d.matches
d_to_f = top_d.matches["f"]
assert d_to_f.end
assert not d_to_f.matches
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