test_reader.py
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from unittest.mock import MagicMock
from etl_to_crawler.reader import (
fetch_all_song_record_relations,
fetch_platform_records_by_record_ids,
fetch_platform_records,
iter_hk_songs_batches,
select_primary_record,
)
def _make_cursor(rows):
cur = MagicMock()
cur.__enter__ = MagicMock(return_value=cur)
cur.__exit__ = MagicMock(return_value=False)
cur.fetchall.return_value = rows
return cur
def test_fetch_platform_records_keeps_one_record_per_song_and_platform():
conn = MagicMock()
conn.cursor.return_value = _make_cursor([
{
'source_song_id': 10,
'record_id': 100,
'platform': '1',
'platform_unique_key': 'qq-mid',
'platform_mid': '100',
'album_audio_id': None,
'is_main_version': 0,
'is_high': 1,
'pub_time': '2020-01-01',
},
{
'source_song_id': 10,
'record_id': 101,
'platform': '2',
'platform_unique_key': '200',
'platform_mid': 'kg-hash',
'album_audio_id': None,
'is_main_version': 1,
'is_high': 0,
'pub_time': '2021-01-01',
},
{
'source_song_id': 10,
'record_id': 102,
'platform': '4',
'platform_unique_key': '300',
'platform_mid': None,
'album_audio_id': None,
'is_main_version': 1,
'is_high': 1,
'pub_time': '2022-01-01',
},
])
result = fetch_platform_records(conn, [10])
assert len(result) == 3
assert {row['record_id'] for row in result} == {100, 101, 102}
def test_fetch_platform_records_by_record_ids_queries_exact_records_once():
conn = MagicMock()
conn.cursor.return_value = _make_cursor([
{
'source_song_id': 10,
'record_id': 200,
'platform': '2',
'platform_unique_key': '200',
'platform_mid': 'kg-hash',
'album_audio_id': None,
'is_main_version': 1,
'is_high': 0,
'pub_time': '2021-01-01',
},
])
result = fetch_platform_records_by_record_ids(conn, [200, 200])
cur = conn.cursor.return_value
sql, params = cur.execute.call_args[0]
assert 'WHERE mr.id IN (%s)' in sql
assert params == [200]
assert result[0]['record_id'] == 200
assert result[0]['platform'] == '2'
def test_fetch_all_song_record_relations_keeps_all_records_for_a_song():
conn = MagicMock()
conn.cursor.return_value = _make_cursor([
{'source_song_id': 10, 'record_id': 100, 'platform': '1'},
{'source_song_id': 10, 'record_id': 101, 'platform': '1'},
{'source_song_id': 10, 'record_id': 200, 'platform': '2'},
{'source_song_id': 10, 'record_id': 101, 'platform': '1'},
])
result = fetch_all_song_record_relations(conn, [10])
assert [(row['record_id'], row['platform']) for row in result] == [
(100, '1'), (101, '1'), (200, '2'),
]
def test_select_primary_record_prefers_main_version_then_is_high():
rows = [
{
'source_song_id': 10,
'record_id': 100,
'platform': '1',
'platform_unique_key': 'qq-mid',
'platform_mid': '100',
'album_audio_id': None,
'is_main_version': 0,
'is_high': 1,
'pub_time': '2020-01-01',
},
{
'source_song_id': 10,
'record_id': 101,
'platform': '2',
'platform_unique_key': '200',
'platform_mid': 'kg-hash',
'album_audio_id': None,
'is_main_version': 1,
'is_high': 0,
'pub_time': '2021-01-01',
},
{
'source_song_id': 10,
'record_id': 102,
'platform': '4',
'platform_unique_key': '300',
'platform_mid': None,
'album_audio_id': None,
'is_main_version': 1,
'is_high': 1,
'pub_time': '2022-01-01',
},
]
assert select_primary_record(rows)['record_id'] == 102
def test_select_primary_record_uses_earliest_pub_time_when_priority_ties():
rows = [
{
'source_song_id': 10,
'record_id': 100,
'platform': '1',
'platform_unique_key': 'qq-mid',
'platform_mid': '100',
'album_audio_id': None,
'is_main_version': 0,
'is_high': 0,
'pub_time': '2020-01-01',
},
{
'source_song_id': 10,
'record_id': 101,
'platform': '2',
'platform_unique_key': '200',
'platform_mid': 'kg-hash',
'album_audio_id': None,
'is_main_version': 0,
'is_high': 0,
'pub_time': '2019-01-01',
},
]
assert select_primary_record(rows)['record_id'] == 101
def test_iter_hk_songs_batches_uses_id_cursor_instead_of_offset():
cur = _make_cursor([])
cur.fetchall.side_effect = [
[{'id': 10, 'source_song_id': 100}, {'id': 20, 'source_song_id': 200}],
[{'id': 25, 'source_song_id': 250}],
]
conn = MagicMock()
conn.cursor.return_value = cur
batches = list(iter_hk_songs_batches(conn, batch_size=2, start_after_id=5))
assert batches == [
[{'id': 10, 'source_song_id': 100}, {'id': 20, 'source_song_id': 200}],
[{'id': 25, 'source_song_id': 250}],
]
assert cur.execute.call_args_list[0][0][1] == (5, 2)
assert cur.execute.call_args_list[1][0][1] == (20, 2)