7dfe1ae88d
Clicking a MusicBrainz album returned 404 because the browse-based
search path now stores release-GROUP MBIDs in Album.id, but `get_album`
still hit `/ws/2/release/<mbid>` directly. Release-group MBIDs don't
resolve as release MBIDs — MB 404s. User log:
GET /api/spotify/album/b88655ba...?source=musicbrainz → 404
Error fetching release b88655ba...: 404 Client Error
The fix requires a two-step resolution for the new browse path:
1. Look up the release-group with `inc=releases+artist-credits` to get
the list of releases inside (original + reissues + regional + promo
editions). MB release-groups routinely hold 5-20 releases.
2. Pick a representative release: prefer Official status over Promo,
prefer releases with a real tracklist over stubs, then earliest date.
3. Fetch that release's full tracklist via `get_release`.
Two extra seconds at the 1-rps rate limit, but it's on click, not on
search results rendering.
Structure:
- New `MusicBrainzClient.get_release_group(mbid, includes)` method.
- New `_pick_representative_release(releases)` helper encapsulates the
ranking logic.
- Tracklist projection extracted into `_render_release_as_album` so
both paths share the same shape construction.
- `get_album` tries release-group first; falls back to direct release
lookup when the MBID turns out to be a release from the text-search
fallback path.
- Canonical Album.id stays the release-group MBID so a re-fetch with
the same URL hits the same code path idempotently.
3 new tests (now 33 total):
- End-to-end release-group → release resolution with mocked client
- Fallback to direct release lookup when rg lookup misses
- Representative-release picker ranks correctly
Verified against live API with the exact MBID that 404'd for the user
(b88655ba... for DAMN. by Kendrick Lamar): now returns in 1.2s with
the full 14-track listing (BLOOD., DNA., YAH., ELEMENT., FEEL., ...).
554 lines
23 KiB
Python
554 lines
23 KiB
Python
"""Tests for the MusicBrainz search adapter (core/musicbrainz_search.py).
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Covers the behavior changes from the search-overhaul PR:
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- Artist search is re-enabled and score-filtered
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- Bare name queries route through artist-first → browse
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- Structured 'Artist - Title' queries stay on text search
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- Top-artist resolution is memoized per instance
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- Cover Art URLs are constructed, not probed
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"""
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from unittest.mock import MagicMock, patch
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import pytest
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from core.musicbrainz_search import (
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MusicBrainzSearchClient,
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_cover_art_url,
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)
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# ---------------------------------------------------------------------------
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# Cover art URL construction
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# ---------------------------------------------------------------------------
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def test_cover_art_url_release_scope():
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assert _cover_art_url('abc-123') == 'https://coverartarchive.org/release/abc-123/front-250'
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def test_cover_art_url_release_group_scope():
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assert _cover_art_url('abc-123', scope='release-group') == \
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'https://coverartarchive.org/release-group/abc-123/front-250'
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def test_cover_art_url_empty_mbid_returns_none():
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assert _cover_art_url('') is None
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assert _cover_art_url(None) is None
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def test_cover_art_url_unknown_scope_falls_back_to_release():
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assert _cover_art_url('abc', scope='garbage') == 'https://coverartarchive.org/release/abc/front-250'
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# ---------------------------------------------------------------------------
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# Structured query splitting
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# ---------------------------------------------------------------------------
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def test_split_structured_query_hyphen():
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client = MusicBrainzSearchClient()
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assert client._split_structured_query('Metallica - Master of Puppets') == ('Metallica', 'Master of Puppets')
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def test_split_structured_query_en_dash():
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client = MusicBrainzSearchClient()
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assert client._split_structured_query('Metallica – One') == ('Metallica', 'One')
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def test_split_structured_query_em_dash():
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client = MusicBrainzSearchClient()
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assert client._split_structured_query('Metallica — Battery') == ('Metallica', 'Battery')
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def test_split_structured_query_bare_name():
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client = MusicBrainzSearchClient()
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assert client._split_structured_query('metallica') == (None, 'metallica')
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def test_split_structured_query_no_separator_with_hyphens_in_word():
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# A hyphen inside a word (no surrounding spaces) should not split.
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client = MusicBrainzSearchClient()
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assert client._split_structured_query('t-pain') == (None, 't-pain')
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# ---------------------------------------------------------------------------
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# Artist search — score filtering and shape
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# ---------------------------------------------------------------------------
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def _mk_artist(name, mbid, score=100, tags=None):
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return {
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'id': mbid,
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'name': name,
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'score': score,
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'tags': tags or [],
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}
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def test_search_artists_filters_by_score_threshold():
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client = MusicBrainzSearchClient()
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client._client = MagicMock()
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client._client.search_artist.return_value = [
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_mk_artist('Metallica', 'mb-real', score=100),
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_mk_artist('Metallica Tribute', 'mb-tribute', score=60),
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_mk_artist('Metallica Jam', 'mb-jam', score=58),
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]
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results = client.search_artists('metallica', limit=10)
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assert len(results) == 1
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assert results[0].name == 'Metallica'
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assert results[0].id == 'mb-real'
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def test_search_artists_uses_strict_false_for_fuzzy_match():
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"""The adapter must use strict=False so MusicBrainz searches
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alias+artist+sortname together — strict mode would miss aliased names."""
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client = MusicBrainzSearchClient()
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client._client = MagicMock()
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client._client.search_artist.return_value = []
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client.search_artists('metallica')
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client._client.search_artist.assert_called_once_with('metallica', limit=10, strict=False)
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def test_search_artists_returns_empty_on_exception():
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client = MusicBrainzSearchClient()
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client._client = MagicMock()
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client._client.search_artist.side_effect = RuntimeError('network down')
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assert client.search_artists('metallica') == []
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def test_search_artists_extracts_tags_as_genres():
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client = MusicBrainzSearchClient()
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client._client = MagicMock()
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client._client.search_artist.return_value = [
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_mk_artist('Metallica', 'mb-real', score=100,
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tags=[{'name': 'thrash metal', 'count': 20},
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{'name': 'heavy metal', 'count': 15}]),
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]
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results = client.search_artists('metallica')
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assert results[0].genres == ['thrash metal', 'heavy metal']
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def test_search_artists_skips_entries_without_mbid_or_name():
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client = MusicBrainzSearchClient()
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client._client = MagicMock()
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client._client.search_artist.return_value = [
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{'id': 'mb-1', 'name': 'Good', 'score': 100},
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{'id': '', 'name': 'Missing MBID', 'score': 100},
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{'id': 'mb-2', 'name': '', 'score': 100},
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]
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results = client.search_artists('x')
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assert [r.name for r in results] == ['Good']
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# ---------------------------------------------------------------------------
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# Top-artist resolution — memoization
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# ---------------------------------------------------------------------------
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def test_resolve_top_artist_memoizes_by_normalized_query():
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client = MusicBrainzSearchClient()
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client._client = MagicMock()
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client._client.search_artist.return_value = [_mk_artist('Metallica', 'mb-1', score=100)]
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first = client._resolve_top_artist('metallica')
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second = client._resolve_top_artist(' Metallica ') # Whitespace / case variant
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assert first is not None
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assert first['id'] == 'mb-1'
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assert first is second
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# HTTP call happens once despite two resolve calls.
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assert client._client.search_artist.call_count == 1
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def test_resolve_top_artist_returns_none_below_threshold():
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client = MusicBrainzSearchClient()
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client._client = MagicMock()
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client._client.search_artist.return_value = [_mk_artist('Tribute', 'mb-trib', score=50)]
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assert client._resolve_top_artist('obscure') is None
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def test_resolve_top_artist_caches_negative_result():
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"""After a lookup finds no good match, subsequent calls don't refetch."""
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client = MusicBrainzSearchClient()
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client._client = MagicMock()
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client._client.search_artist.return_value = []
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first = client._resolve_top_artist('nonexistent band')
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second = client._resolve_top_artist('nonexistent band')
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assert first is None
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assert second is None
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assert client._client.search_artist.call_count == 1
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def test_resolve_top_artist_empty_query_returns_none_without_http():
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client = MusicBrainzSearchClient()
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client._client = MagicMock()
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assert client._resolve_top_artist('') is None
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client._client.search_artist.assert_not_called()
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# ---------------------------------------------------------------------------
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# Album search — routing
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# ---------------------------------------------------------------------------
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def test_search_albums_bare_query_uses_browse_path():
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"""When a bare name resolves to an artist, we browse their release-groups
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instead of text-searching release titles."""
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client = MusicBrainzSearchClient()
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client._client = MagicMock()
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client._client.search_artist.return_value = [_mk_artist('Metallica', 'mb-1', score=100)]
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client._client.browse_artist_release_groups.return_value = [
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{'id': 'rg-1', 'title': 'Master of Puppets', 'primary-type': 'Album',
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'first-release-date': '1986-03-03', 'secondary-types': []},
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{'id': 'rg-2', 'title': 'Ride the Lightning', 'primary-type': 'Album',
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'first-release-date': '1984-07-27', 'secondary-types': []},
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]
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albums = client.search_albums('metallica', limit=10)
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client._client.browse_artist_release_groups.assert_called_once()
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# Text-search path must NOT be taken.
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client._client.search_release.assert_not_called()
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# Chronological ASC — debut first, so the album list reads like a
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# standard discography (Wikipedia-style: earliest release on top).
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assert [a.name for a in albums] == ['Ride the Lightning', 'Master of Puppets']
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assert all(a.artists == ['Metallica'] for a in albums)
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def test_search_albums_structured_query_uses_text_path():
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"""'Artist - Title' shape should text-search the title rather than
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browsing all of the artist's discography."""
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client = MusicBrainzSearchClient()
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client._client = MagicMock()
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client._client.search_release.return_value = [
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{'id': 'rel-1', 'title': 'Master of Puppets', 'score': 100,
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'date': '1986', 'media': [{'track-count': 8}],
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'release-group': {'id': 'rg-1', 'primary-type': 'Album'},
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'artist-credit': [{'name': 'Metallica'}]},
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]
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albums = client.search_albums('Metallica - Master of Puppets', limit=10)
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client._client.search_release.assert_called_once()
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# Artist-first path must NOT be taken.
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client._client.search_artist.assert_not_called()
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client._client.browse_artist_release_groups.assert_not_called()
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assert len(albums) == 1
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assert albums[0].name == 'Master of Puppets'
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def test_search_albums_falls_back_to_text_when_no_artist_match():
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"""No artist above threshold → text-search the whole query."""
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client = MusicBrainzSearchClient()
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client._client = MagicMock()
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# Artist lookup returns nothing above threshold.
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client._client.search_artist.return_value = [_mk_artist('X', 'mb-x', score=40)]
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client._client.search_release.return_value = []
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client.search_albums('very obscure band')
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client._client.search_release.assert_called_once_with('very obscure band', artist_name=None, limit=10)
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client._client.browse_artist_release_groups.assert_not_called()
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def test_search_albums_filters_live_and_compilation_secondary_types():
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"""Mega-artists' browse results are dominated by live bootlegs and
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best-of compilations — they should be filtered out so the studio
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discography surfaces."""
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client = MusicBrainzSearchClient()
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client._client = MagicMock()
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client._client.search_artist.return_value = [_mk_artist('Metallica', 'mb-1', score=100)]
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client._client.browse_artist_release_groups.return_value = [
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{'id': 'rg-live-1', 'title': 'Live Bootleg 2019', 'primary-type': 'Album',
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'first-release-date': '2019-01-01', 'secondary-types': ['Live']},
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{'id': 'rg-studio-1', 'title': 'Kill Em All', 'primary-type': 'Album',
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'first-release-date': '1983-07-25', 'secondary-types': []},
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{'id': 'rg-comp-1', 'title': 'Greatest Hits', 'primary-type': 'Album',
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'first-release-date': '2010-01-01', 'secondary-types': ['Compilation']},
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{'id': 'rg-studio-2', 'title': 'Master of Puppets', 'primary-type': 'Album',
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'first-release-date': '1986-03-03', 'secondary-types': []},
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]
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albums = client.search_albums('metallica', limit=10)
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titles = [a.name for a in albums]
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assert titles == ['Kill Em All', 'Master of Puppets']
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assert 'Live Bootleg 2019' not in titles
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assert 'Greatest Hits' not in titles
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def test_search_albums_falls_back_to_all_when_no_studio():
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"""Niche live-only artist: if no studio releases exist, show live ones
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rather than returning empty."""
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client = MusicBrainzSearchClient()
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client._client = MagicMock()
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client._client.search_artist.return_value = [_mk_artist('LiveBand', 'mb-1', score=100)]
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client._client.browse_artist_release_groups.return_value = [
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{'id': 'rg-live-1', 'title': 'Live at X', 'primary-type': 'Album',
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'first-release-date': '2019-01-01', 'secondary-types': ['Live']},
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{'id': 'rg-live-2', 'title': 'Live at Y', 'primary-type': 'Album',
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'first-release-date': '2020-01-01', 'secondary-types': ['Live']},
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]
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albums = client.search_albums('liveband', limit=10)
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assert len(albums) == 2
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def test_search_tracks_prefers_studio_release_in_album_field():
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"""When a recording has both a studio release and a live release, the
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Track.album should reflect the studio release (canonical album),
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regardless of the order MB returned them in."""
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client = MusicBrainzSearchClient()
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client._client = MagicMock()
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client._client.search_artist.return_value = [_mk_artist('Metallica', 'mb-1', score=100)]
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client._client.search_recordings_by_artist_mbid.return_value = [
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{
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'id': 'rec-master',
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'title': 'Master of Puppets',
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'length': 516000,
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'artist-credit': [{'name': 'Metallica'}],
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# Live release first (what MB often returns), studio second.
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'releases': [
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{'id': 'rel-live', 'title': 'Live Bootleg', 'date': '2023-01-01',
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'release-group': {'id': 'rg-live', 'primary-type': 'Album',
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'secondary-types': ['Live']}},
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{'id': 'rel-studio', 'title': 'Master of Puppets', 'date': '1986-03-03',
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'release-group': {'id': 'rg-studio', 'primary-type': 'Album',
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'secondary-types': []}},
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],
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},
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]
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tracks = client.search_tracks('metallica', limit=10)
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assert len(tracks) == 1
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# Album must be the studio release, not the live bootleg.
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assert tracks[0].album == 'Master of Puppets'
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assert tracks[0].release_date == '1986-03-03'
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def test_search_tracks_filters_recordings_without_studio_releases():
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"""A recording that only exists on live/compilation releases should be
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dropped when we have studio alternatives."""
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client = MusicBrainzSearchClient()
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client._client = MagicMock()
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client._client.search_artist.return_value = [_mk_artist('Metallica', 'mb-1', score=100)]
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client._client.search_recordings_by_artist_mbid.return_value = [
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{'id': 'rec-studio', 'title': 'Seek and Destroy', 'length': 390000,
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'artist-credit': [{'name': 'Metallica'}],
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'releases': [
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{'id': 'rel-studio', 'title': 'Kill Em All', 'date': '1983-07-25',
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'release-group': {'id': 'rg-studio', 'primary-type': 'Album',
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'secondary-types': []}},
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]},
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{'id': 'rec-live-only', 'title': 'Fight Fire With Fire', 'length': 450000,
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'artist-credit': [{'name': 'Metallica'}],
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'releases': [
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{'id': 'rel-live', 'title': 'Live Shit', 'date': '1993-01-01',
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'release-group': {'id': 'rg-live', 'primary-type': 'Album',
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'secondary-types': ['Live']}},
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]},
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]
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tracks = client.search_tracks('metallica', limit=10)
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titles = [t.name for t in tracks]
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assert 'Seek and Destroy' in titles
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assert 'Fight Fire With Fire' not in titles
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def test_search_albums_text_path_filters_by_score():
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client = MusicBrainzSearchClient()
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client._client = MagicMock()
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# Force text-search path by using a structured query.
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client._client.search_release.return_value = [
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{'id': 'rel-good', 'title': 'Good', 'score': 95,
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'release-group': {'id': 'rg-1', 'primary-type': 'Album'},
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'artist-credit': [{'name': 'Foo'}]},
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{'id': 'rel-bad', 'title': 'Bad', 'score': 40,
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'release-group': {'id': 'rg-2', 'primary-type': 'Album'},
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'artist-credit': [{'name': 'Foo'}]},
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]
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albums = client.search_albums('Foo - Good', limit=10)
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titles = [a.name for a in albums]
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assert 'Good' in titles
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assert 'Bad' not in titles
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# ---------------------------------------------------------------------------
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# Track search — routing
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# ---------------------------------------------------------------------------
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def test_search_tracks_bare_query_uses_browse_path():
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client = MusicBrainzSearchClient()
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client._client = MagicMock()
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client._client.search_artist.return_value = [_mk_artist('Metallica', 'mb-1', score=100)]
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client._client.search_recordings_by_artist_mbid.return_value = [
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{'id': 'rec-1', 'title': 'One', 'length': 446000,
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'releases': [{'id': 'rel-1', 'title': '...And Justice for All', 'date': '1988',
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'release-group': {'id': 'rg-1', 'primary-type': 'Album'}}],
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'artist-credit': [{'name': 'Metallica'}]},
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{'id': 'rec-2', 'title': 'Battery', 'length': 312000,
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'releases': [{'id': 'rel-2', 'title': 'Master of Puppets', 'date': '1986',
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'release-group': {'id': 'rg-2', 'primary-type': 'Album'}}],
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'artist-credit': [{'name': 'Metallica'}]},
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]
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tracks = client.search_tracks('metallica', limit=10)
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client._client.search_recordings_by_artist_mbid.assert_called_once()
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client._client.search_recording.assert_not_called()
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assert len(tracks) == 2
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assert {t.name for t in tracks} == {'One', 'Battery'}
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def test_search_tracks_dedupes_by_title():
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"""MusicBrainz has many live/compilation variants of the same song.
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Browse results should be deduped by normalized title so we don't show
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'One' three times."""
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client = MusicBrainzSearchClient()
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client._client = MagicMock()
|
||
client._client.search_artist.return_value = [_mk_artist('Metallica', 'mb-1', score=100)]
|
||
client._client.search_recordings_by_artist_mbid.return_value = [
|
||
{'id': 'rec-1', 'title': 'One', 'length': 446000,
|
||
'releases': [{'id': 'rel-1', 'title': '...And Justice for All', 'date': '1988'}],
|
||
'artist-credit': [{'name': 'Metallica'}]},
|
||
{'id': 'rec-1-live', 'title': 'One', 'length': 490000,
|
||
'releases': [{'id': 'rel-live', 'title': 'Live Shit', 'date': '1993'}],
|
||
'artist-credit': [{'name': 'Metallica'}]},
|
||
]
|
||
|
||
tracks = client.search_tracks('metallica', limit=10)
|
||
|
||
assert len(tracks) == 1
|
||
assert tracks[0].name == 'One'
|
||
|
||
|
||
def test_search_tracks_structured_query_uses_text_path():
|
||
client = MusicBrainzSearchClient()
|
||
client._client = MagicMock()
|
||
client._client.search_recording.return_value = [
|
||
{'id': 'rec-1', 'title': 'One', 'score': 100,
|
||
'releases': [{'id': 'rel-1', 'title': '...And Justice for All', 'date': '1988'}],
|
||
'artist-credit': [{'name': 'Metallica'}]},
|
||
]
|
||
|
||
tracks = client.search_tracks('Metallica - One', limit=10)
|
||
|
||
client._client.search_recording.assert_called_once()
|
||
client._client.search_artist.assert_not_called()
|
||
client._client.search_recordings_by_artist_mbid.assert_not_called()
|
||
assert len(tracks) == 1
|
||
|
||
|
||
def test_get_album_resolves_release_group_mbid_to_release():
|
||
"""When the album ID is a release-group MBID (from the browse path),
|
||
get_album must look up the release-group, pick a canonical release,
|
||
and fetch that release's tracklist. Fetching /release/<rg-mbid>
|
||
directly 404s."""
|
||
client = MusicBrainzSearchClient()
|
||
client._client = MagicMock()
|
||
# Release-group lookup returns two editions — an Official release and
|
||
# a promo. The Official earlier release should win.
|
||
client._client.get_release_group.return_value = {
|
||
'id': 'rg-damn',
|
||
'title': 'DAMN.',
|
||
'primary-type': 'Album',
|
||
'secondary-types': [],
|
||
'first-release-date': '2017-04-14',
|
||
'artist-credit': [{'name': 'Kendrick Lamar'}],
|
||
'releases': [
|
||
{'id': 'rel-promo', 'status': 'Promotion', 'date': '2017-04-01',
|
||
'media': [{'track-count': 14, 'tracks': []}]},
|
||
{'id': 'rel-official', 'status': 'Official', 'date': '2017-04-14',
|
||
'media': [{'track-count': 14, 'tracks': []}]},
|
||
],
|
||
}
|
||
# Release lookup returns a full release with tracklist.
|
||
client._client.get_release.return_value = {
|
||
'id': 'rel-official',
|
||
'title': 'DAMN.',
|
||
'date': '2017-04-14',
|
||
'artist-credit': [{'name': 'Kendrick Lamar'}],
|
||
'release-group': {'id': 'rg-damn', 'primary-type': 'Album', 'secondary-types': []},
|
||
'media': [
|
||
{'position': 1, 'tracks': [
|
||
{'id': 't1', 'number': '1', 'position': 1, 'length': 50000,
|
||
'recording': {'id': 'rec-1', 'title': 'BLOOD.',
|
||
'artist-credit': [{'name': 'Kendrick Lamar'}], 'length': 50000}},
|
||
]},
|
||
],
|
||
}
|
||
|
||
album = client.get_album('rg-damn')
|
||
|
||
# Must have called release-group first, then release for the picked edition.
|
||
client._client.get_release_group.assert_called_once_with(
|
||
'rg-damn', includes=['releases', 'artist-credits']
|
||
)
|
||
client._client.get_release.assert_called_once_with(
|
||
'rel-official', includes=['recordings', 'artist-credits', 'release-groups']
|
||
)
|
||
assert album is not None
|
||
assert album['id'] == 'rg-damn' # Canonical ID stays the release-group MBID.
|
||
assert album['name'] == 'DAMN.'
|
||
assert len(album['tracks']) == 1
|
||
assert album['tracks'][0]['name'] == 'BLOOD.'
|
||
assert 'release-group' in album['external_urls']['musicbrainz']
|
||
|
||
|
||
def test_get_album_falls_back_to_release_lookup_on_rg_miss():
|
||
"""When the MBID is a release (from the text-search fallback path) the
|
||
release-group lookup 404s, but the direct release lookup works."""
|
||
client = MusicBrainzSearchClient()
|
||
client._client = MagicMock()
|
||
# Release-group lookup returns None (simulating 404).
|
||
client._client.get_release_group.return_value = None
|
||
client._client.get_release.return_value = {
|
||
'id': 'rel-abc',
|
||
'title': 'Some Album',
|
||
'date': '2020-01-01',
|
||
'artist-credit': [{'name': 'Some Artist'}],
|
||
'release-group': {'id': 'rg-abc', 'primary-type': 'Album', 'secondary-types': []},
|
||
'media': [{'position': 1, 'tracks': []}],
|
||
}
|
||
|
||
album = client.get_album('rel-abc')
|
||
|
||
client._client.get_release_group.assert_called_once()
|
||
client._client.get_release.assert_called_once()
|
||
assert album is not None
|
||
assert album['id'] == 'rel-abc' # Falls back to release MBID since rg lookup missed.
|
||
|
||
|
||
def test_pick_representative_release_prefers_official_with_media():
|
||
"""The release picker should skip stub releases (no media) and pick
|
||
Official over Promotion status."""
|
||
client = MusicBrainzSearchClient()
|
||
releases = [
|
||
{'id': 'stub', 'status': 'Official', 'date': '2020-01-01'}, # No media
|
||
{'id': 'promo', 'status': 'Promotion', 'date': '2019-12-01',
|
||
'media': [{'track-count': 10}]},
|
||
{'id': 'official', 'status': 'Official', 'date': '2020-01-05',
|
||
'media': [{'track-count': 10}]},
|
||
]
|
||
picked = client._pick_representative_release(releases)
|
||
assert picked['id'] == 'official'
|
||
|
||
|
||
def test_search_tracks_text_path_filters_by_score():
|
||
client = MusicBrainzSearchClient()
|
||
client._client = MagicMock()
|
||
client._client.search_recording.return_value = [
|
||
{'id': 'rec-good', 'title': 'Good', 'score': 95,
|
||
'releases': [{'id': 'rel-1', 'title': 'X', 'date': '2020'}],
|
||
'artist-credit': [{'name': 'Foo'}]},
|
||
{'id': 'rec-bad', 'title': 'Bad', 'score': 40,
|
||
'releases': [{'id': 'rel-2', 'title': 'Y', 'date': '2021'}],
|
||
'artist-credit': [{'name': 'Foo'}]},
|
||
]
|
||
|
||
tracks = client.search_tracks('Foo - Good', limit=10)
|
||
|
||
titles = [t.name for t in tracks]
|
||
assert 'Good' in titles
|
||
assert 'Bad' not in titles
|