server/tests: use transactional db for faster unit tests

* `test_modify_saves_non_empty_diffs` needs non-transactional
  db, so moved to seperate file
* Replaced incompatable usage of `db.session.rollback()`
  with parametrerized function calls
* xfail conditionals for search removed, as we can no longer
  get current driver with binds
* Also remove usage of deprecated `pytest.yield_fixture`

4 files changed, 74 insertions, 58 deletions

diff --git a/server/szurubooru/tests/func/test_snapshots.py b/server/szurubooru/tests/func/test_snapshots.py
index da93530..dc68ff0 100644
--- a/server/szurubooru/tests/func/test_snapshots.py
+++ b/server/szurubooru/tests/func/test_snapshots.py
@@ -1,7 +1,7 @@
 from datetime import datetime
 from unittest.mock import patch
 
-import pytest
+import pytest  # noqa: F401
 
 from szurubooru import db, model
 from szurubooru.func import snapshots, users
@@ -144,46 +144,6 @@ def test_create(tag_factory, user_factory):
     assert results[0].data == "mocked"
 
 
-def test_modify_saves_non_empty_diffs(post_factory, user_factory):
-    if "sqlite" in db.session.get_bind().driver:
-        pytest.xfail(
-            "SQLite doesn't support transaction isolation, "
-            "which is required to retrieve original entity"
-        )
-    post = post_factory()
-    post.notes = [model.PostNote(polygon=[(0, 0), (0, 1), (1, 1)], text="old")]
-    user = user_factory()
-    db.session.add_all([post, user])
-    db.session.commit()
-    post.source = "new source"
-    post.notes = [model.PostNote(polygon=[(0, 0), (0, 1), (1, 1)], text="new")]
-    db.session.flush()
-    with patch("szurubooru.func.snapshots._post_to_webhooks"):
-        snapshots.modify(post, user)
-        db.session.flush()
-        results = db.session.query(model.Snapshot).all()
-        assert len(results) == 1
-        assert results[0].data == {
-            "type": "object change",
-            "value": {
-                "source": {
-                    "type": "primitive change",
-                    "old-value": None,
-                    "new-value": "new source",
-                },
-                "notes": {
-                    "type": "list change",
-                    "removed": [
-                        {"polygon": [[0, 0], [0, 1], [1, 1]], "text": "old"}
-                    ],
-                    "added": [
-                        {"polygon": [[0, 0], [0, 1], [1, 1]], "text": "new"}
-                    ],
-                },
-            },
-        }
-
-
 def test_modify_doesnt_save_empty_diffs(tag_factory, user_factory):
     tag = tag_factory(names=["dummy"])
     user = user_factory()
diff --git a/server/szurubooru/tests/func/test_snapshots_transactional_isolation.py b/server/szurubooru/tests/func/test_snapshots_transactional_isolation.py
new file mode 100644
index 0000000..b98cea7
--- /dev/null
+++ b/server/szurubooru/tests/func/test_snapshots_transactional_isolation.py
@@ -0,0 +1,59 @@
+from unittest.mock import patch
+
+import pytest
+
+from szurubooru import db, model
+from szurubooru.func import snapshots
+
+
+@pytest.fixture(autouse=True)
+def session(query_logger, postgresql_db):
+    """
+    Override db session for this specific test section only
+    """
+    db.session = postgresql_db.session
+    postgresql_db.create_table(*model.Base.metadata.sorted_tables)
+    try:
+        yield postgresql_db.session
+    finally:
+        postgresql_db.reset_db()
+
+
+def test_modify_saves_non_empty_diffs(post_factory, user_factory):
+    if "sqlite" in db.session.get_bind().driver:
+        pytest.xfail(
+            "SQLite doesn't support transaction isolation, "
+            "which is required to retrieve original entity"
+        )
+    post = post_factory()
+    post.notes = [model.PostNote(polygon=[(0, 0), (0, 1), (1, 1)], text="old")]
+    user = user_factory()
+    db.session.add_all([post, user])
+    db.session.commit()
+    post.source = "new source"
+    post.notes = [model.PostNote(polygon=[(0, 0), (0, 1), (1, 1)], text="new")]
+    db.session.flush()
+    with patch("szurubooru.func.snapshots._post_to_webhooks"):
+        snapshots.modify(post, user)
+        db.session.flush()
+        results = db.session.query(model.Snapshot).all()
+        assert len(results) == 1
+        assert results[0].data == {
+            "type": "object change",
+            "value": {
+                "source": {
+                    "type": "primitive change",
+                    "old-value": None,
+                    "new-value": "new source",
+                },
+                "notes": {
+                    "type": "list change",
+                    "removed": [
+                        {"polygon": [[0, 0], [0, 1], [1, 1]], "text": "old"}
+                    ],
+                    "added": [
+                        {"polygon": [[0, 0], [0, 1], [1, 1]], "text": "new"}
+                    ],
+                },
+            },
+        }
diff --git a/server/szurubooru/tests/func/test_tag_categories.py b/server/szurubooru/tests/func/test_tag_categories.py
index 11300cf..9e649a3 100644
--- a/server/szurubooru/tests/func/test_tag_categories.py
+++ b/server/szurubooru/tests/func/test_tag_categories.py
@@ -107,17 +107,16 @@ def test_update_category_name_reusing_other_name(
         tag_categories.update_category_name(category, "NAME")
 
 
+@pytest.mark.parametrize("name", ["name", "NAME"])
 def test_update_category_name_reusing_own_name(
-    config_injector, tag_category_factory
+    config_injector, tag_category_factory, name
 ):
     config_injector({"tag_category_name_regex": ".*"})
-    for name in ["name", "NAME"]:
-        category = tag_category_factory(name="name")
-        db.session.add(category)
-        db.session.flush()
-        tag_categories.update_category_name(category, name)
-        assert category.name == name
-        db.session.rollback()
+    category = tag_category_factory(name="name")
+    db.session.add(category)
+    db.session.flush()
+    tag_categories.update_category_name(category, name)
+    assert category.name == name
 
 
 def test_update_category_color_with_empty_string(tag_category_factory):
diff --git a/server/szurubooru/tests/func/test_tags.py b/server/szurubooru/tests/func/test_tags.py
index ac8963c..60df122 100644
--- a/server/szurubooru/tests/func/test_tags.py
+++ b/server/szurubooru/tests/func/test_tags.py
@@ -513,15 +513,14 @@ def test_update_tag_names_trying_to_use_taken_name(
         tags.update_tag_names(tag, ["A"])
 
 
-def test_update_tag_names_reusing_own_name(config_injector, tag_factory):
+@pytest.mark.parametrize("name", list("aA"))
+def test_update_tag_names_reusing_own_name(config_injector, tag_factory, name):
     config_injector({"tag_name_regex": "^[a-zA-Z]*$"})
-    for name in list("aA"):
-        tag = tag_factory(names=["a"])
-        db.session.add(tag)
-        db.session.flush()
-        tags.update_tag_names(tag, [name])
-        assert [tag_name.name for tag_name in tag.names] == [name]
-        db.session.rollback()
+    tag = tag_factory(names=["a"])
+    db.session.add(tag)
+    db.session.flush()
+    tags.update_tag_names(tag, [name])
+    assert [tag_name.name for tag_name in tag.names] == [name]
 
 
 def test_update_tag_names_changing_primary_name(config_injector, tag_factory):
@@ -533,7 +532,6 @@ def test_update_tag_names_changing_primary_name(config_injector, tag_factory):
     db.session.flush()
     db.session.refresh(tag)
     assert [tag_name.name for tag_name in tag.names] == ["b", "a"]
-    db.session.rollback()
 
 
 @pytest.mark.parametrize("attempt", ["name", "NAME", "alias", "ALIAS"])