Initial commit

tests/test_adapter.py

@@ -0,0 +1,89 @@
+import sys
+
+import pytest
+from harlequin.adapter import HarlequinAdapter, HarlequinConnection, HarlequinCursor
+from harlequin.catalog import Catalog, CatalogItem
+from harlequin.exception import HarlequinConnectionError, HarlequinQueryError
+from harlequin_myadapter.adapter import MyAdapter, MyConnection
+from textual_fastdatatable.backend import create_backend
+
+if sys.version_info < (3, 10):
+    from importlib_metadata import entry_points
+else:
+    from importlib.metadata import entry_points
+
+
+def test_plugin_discovery() -> None:
+    PLUGIN_NAME = "my-adapter"
+    eps = entry_points(group="harlequin.adapter")
+    assert eps[PLUGIN_NAME]
+    adapter_cls = eps[PLUGIN_NAME].load()
+    assert issubclass(adapter_cls, HarlequinAdapter)
+    assert adapter_cls == MyAdapter
+
+
+def test_connect() -> None:
+    conn = MyAdapter(conn_str=tuple()).connect()
+    assert isinstance(conn, HarlequinConnection)
+
+
+def test_init_extra_kwargs() -> None:
+    assert MyAdapter(conn_str=tuple(), foo=1, bar="baz").connect()
+
+
+def test_connect_raises_connection_error() -> None:
+    with pytest.raises(HarlequinConnectionError):
+        _ = MyAdapter(conn_str=("foo",)).connect()
+
+
+@pytest.fixture
+def connection() -> MyConnection:
+    return MyAdapter(conn_str=tuple()).connect()
+
+
+def test_get_catalog(connection: MyConnection) -> None:
+    catalog = connection.get_catalog()
+    assert isinstance(catalog, Catalog)
+    assert catalog.items
+    assert isinstance(catalog.items[0], CatalogItem)
+
+
+def test_execute_ddl(connection: MyConnection) -> None:
+    cur = connection.execute("create table foo (a int)")
+    assert cur is None
+
+
+def test_execute_select(connection: MyConnection) -> None:
+    cur = connection.execute("select 1 as a")
+    assert isinstance(cur, HarlequinCursor)
+    assert cur.columns() == [("a", "##")]
+    data = cur.fetchall()
+    backend = create_backend(data)
+    assert backend.column_count == 1
+    assert backend.row_count == 1
+
+
+def test_execute_select_dupe_cols(connection: MyConnection) -> None:
+    cur = connection.execute("select 1 as a, 2 as a, 3 as a")
+    assert isinstance(cur, HarlequinCursor)
+    assert len(cur.columns()) == 3
+    data = cur.fetchall()
+    backend = create_backend(data)
+    assert backend.column_count == 3
+    assert backend.row_count == 1
+
+
+def test_set_limit(connection: MyConnection) -> None:
+    cur = connection.execute("select 1 as a union all select 2 union all select 3")
+    assert isinstance(cur, HarlequinCursor)
+    cur = cur.set_limit(2)
+    assert isinstance(cur, HarlequinCursor)
+    data = cur.fetchall()
+    backend = create_backend(data)
+    assert backend.column_count == 1
+    assert backend.row_count == 2
+
+
+def test_execute_raises_query_error(connection: MyConnection) -> None:
+    with pytest.raises(HarlequinQueryError):
+        _ = connection.execute("selec;")