tests: add tests for all queries

tests/queries/test_author.py

@@ -0,0 +1,38 @@
+from sqlalchemy.orm import Session
+
+from worblehat.models import Author
+from worblehat.queries.author import search_authors_by_name
+
+
+def test_search_authors_by_name_matches_substring_case_insensitively(sql_session: Session) -> None:
+    tolkien = Author(name="J.R.R. Tolkien")
+    orwell = Author(name="George Orwell")
+    sql_session.add_all([tolkien, orwell])
+    sql_session.flush()
+
+    result = search_authors_by_name(sql_session, "tolkien")
+
+    assert result == [tolkien]
+
+
+def test_search_authors_by_name_returns_empty_when_no_match(sql_session: Session) -> None:
+    sql_session.add(Author(name="Roald Dahl"))
+    sql_session.flush()
+
+    result = search_authors_by_name(sql_session, "nonexistent")
+
+    assert result == []
+
+
+def test_search_authors_by_name_returns_all_matches(sql_session: Session) -> None:
+    tolkien = Author(name="J.R.R. Tolkien")
+    orwell = Author(name="George Orwell")
+    dahl = Author(name="Roald Dahl")
+    nesbo = Author(name="Jo Nesbø")
+    nakamura = Author(name="中村 文則")
+    sql_session.add_all([tolkien, orwell, dahl, nesbo, nakamura])
+    sql_session.flush()
+
+    result = search_authors_by_name(sql_session, "e")
+
+    assert set(result) == {tolkien, orwell, nesbo}