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import pytest
from szurubooru import db
from szurubooru.func import similar
@pytest.fixture
def verify_posts():
def verify(actual_posts, expected_posts):
actual_post_ids = list([p.post_id for p in actual_posts])
expected_post_ids = list([p.post_id for p in expected_posts])
assert actual_post_ids == expected_post_ids
return verify
def test_find_similar_posts(post_factory, tag_factory, verify_posts):
tagA = tag_factory(names=["a"])
tagB = tag_factory(names=["b"])
tagC = tag_factory(names=["c"])
postA = post_factory(id=1, tags=[tagA])
postAB = post_factory(id=2, tags=[tagA, tagB])
postAC = post_factory(id=3, tags=[tagA, tagC])
postABC = post_factory(id=4, tags=[tagA, tagB, tagC])
postBC = post_factory(id=5, tags=[tagB, tagC])
db.session.add_all([tagA, tagB, tagC, postA, postAB, postAC, postABC, postBC])
db.session.flush()
results = similar.find_similar_posts(postBC, 10)
verify_posts(results, [postABC, postAC, postAB])
results = similar.find_similar_posts(postBC, 2)
verify_posts(results, [postABC, postAC])
results = similar.find_similar_posts(postABC, 10)
verify_posts(results, [postBC, postAC, postAB, postA])
results = similar.find_similar_posts(postA, 10)
verify_posts(results, [postABC, postAC, postAB]) # sorted by id
results = similar.find_similar_posts(postAB, 10)
verify_posts(results, [postABC, postBC, postAC, postA])
results = similar.find_similar_posts(postAC, 10)
verify_posts(results, [postABC, postBC, postAB, postA])
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