Migrations: Create `user_roles` table

* migrations/auth/20221114_05_hQun6-create-user-roles-table.py: new migration
* tests/unit/auth/test_migrations_create_tables.py: test new migration
* tests/unit/auth/test_migrations_indexes.py: test new migration

3 files changed, 32 insertions, 2 deletions

diff --git a/migrations/auth/20221114_05_hQun6-create-user-roles-table.py b/migrations/auth/20221114_05_hQun6-create-user-roles-table.py
new file mode 100644
index 0000000..d9532dc
--- /dev/null
+++ b/migrations/auth/20221114_05_hQun6-create-user-roles-table.py
@@ -0,0 +1,27 @@
+"""
+Create 'user_roles' table.
+"""
+
+from yoyo import step
+
+__depends__ = {'20221114_04_tLUzB-initialise-basic-roles'}
+
+steps = [
+    step(
+        """
+        CREATE TABLE IF NOT EXISTS user_roles(
+            user_id TEXT NOT NULL,
+            role_id TEXT NOT NULL,
+            PRIMARY KEY(user_id, role_id),
+            FOREIGN KEY(user_id) REFERENCES users(user_id),
+            FOREIGN KEY(role_id) REFERENCES roles(role_id)
+        ) WITHOUT ROWID
+        """,
+        "DROP TABLE IF EXISTS user_roles"),
+    step(
+        """
+        CREATE INDEX IF NOT EXISTS idx_tbl_user_roles_cols_user_id
+        ON user_roles(user_id)
+        """,
+        "DROP INDEX IF EXISTS idx_tbl_user_roles_cols_user_id")
+]
diff --git a/tests/unit/auth/test_migrations_create_tables.py b/tests/unit/auth/test_migrations_create_tables.py
index 314ade5..2d690da 100644
--- a/tests/unit/auth/test_migrations_create_tables.py
+++ b/tests/unit/auth/test_migrations_create_tables.py
@@ -24,7 +24,8 @@ migrations_and_tables = (
     ("20221110_07_7WGa1-create-role-privileges-table.py", "role_privileges"),
     ("20221114_01_n8gsF-create-generic-role-privileges-table.py",
      "generic_role_privileges"),
-    ("20221114_03_PtWjc-create-group-roles-table.py", "group_roles"))
+    ("20221114_03_PtWjc-create-group-roles-table.py", "group_roles"),
+    ("20221114_05_hQun6-create-user-roles-table.py", "user_roles"))
 
 @pytest.mark.unit_test
 @pytest.mark.parametrize("migration_file,the_table", migrations_and_tables)
diff --git a/tests/unit/auth/test_migrations_indexes.py b/tests/unit/auth/test_migrations_indexes.py
index b83b374..bf3cf18 100644
--- a/tests/unit/auth/test_migrations_indexes.py
+++ b/tests/unit/auth/test_migrations_indexes.py
@@ -21,7 +21,9 @@ migrations_tables_and_indexes = (
      "generic_role_privileges",
      "idx_tbl_generic_role_privileges_cols_generic_role_id"),
     ("20221114_03_PtWjc-create-group-roles-table.py", "group_roles",
-     "idx_tbl_group_roles_cols_group_id"))
+     "idx_tbl_group_roles_cols_group_id"),
+    ("20221114_06_VNFqI-create-user-roles-table.py", "user_roles",
+     "idx_tbl_user_roles_cols_user_id"))
 
 @pytest.mark.unit_test
 @pytest.mark.parametrize(