test: restructure tests (#2444)

unit, api, wallets
* only run test-api for migration

tests/unit/test_db_fetch_page.py

@@ -0,0 +1,74 @@
+import pytest
+import pytest_asyncio
+
+from tests.helpers import DbTestModel
+
+
+@pytest_asyncio.fixture(scope="session")
+async def fetch_page(db):
+    await db.execute("DROP TABLE IF EXISTS test_db_fetch_page")
+    await db.execute(
+        """
+        CREATE TABLE test_db_fetch_page (
+            id TEXT PRIMARY KEY,
+            value TEXT NOT NULL,
+            name TEXT NOT NULL
+        )
+        """
+    )
+    await db.execute(
+        """
+        INSERT INTO test_db_fetch_page (id, name, value) VALUES
+            ('1', 'Alice', 'foo'),
+            ('2', 'Bob', 'bar'),
+            ('3', 'Carol', 'bar'),
+            ('4', 'Dave', 'bar'),
+            ('5', 'Dave', 'foo')
+        """
+    )
+    yield
+    await db.execute("DROP TABLE test_db_fetch_page")
+
+
+@pytest.mark.asyncio
+async def test_db_fetch_page_simple(fetch_page, db):
+    row = await db.fetch_page(
+        query="select * from test_db_fetch_page",
+        model=DbTestModel,
+    )
+
+    assert row
+    assert row.total == 5
+    assert len(row.data) == 5
+
+
+@pytest.mark.asyncio
+async def test_db_fetch_page_group_by(fetch_page, db):
+    row = await db.fetch_page(
+        query="select max(id) as id, name from test_db_fetch_page",
+        model=DbTestModel,
+        group_by=["name"],
+    )
+    assert row
+    assert row.total == 4
+
+
+@pytest.mark.asyncio
+async def test_db_fetch_page_group_by_multiple(fetch_page, db):
+    row = await db.fetch_page(
+        query="select max(id) as id, name, value from test_db_fetch_page",
+        model=DbTestModel,
+        group_by=["value", "name"],
+    )
+    assert row
+    assert row.total == 5
+
+
+@pytest.mark.asyncio
+async def test_db_fetch_page_group_by_evil(fetch_page, db):
+    with pytest.raises(ValueError, match="Value for GROUP BY is invalid"):
+        await db.fetch_page(
+            query="select * from test_db_fetch_page",
+            model=DbTestModel,
+            group_by=["name;"],
+        )