add test for paths without path selector

update GraphSelector doc string to include selectors

cosmos/dbt/selector.py

@@ -35,6 +35,10 @@ class GraphSelector:
  +model_d+
  2+model_e
  model_f+3
+ +/path/to/model_g+
+ path:/path/to/model_h+
+ +tag:nightly
+ +config.materialized:view
 
  https://docs.getdbt.com/reference/node-selection/graph-operators
  """

tests/dbt/test_selector.py

@@ -191,6 +191,14 @@ def test_select_nodes_by_select_path():
  assert selected == expected
 
 
+def test_select_nodes_with_slash_but_no_path_selector():
+ selected = select_nodes(project_dir=SAMPLE_PROJ_PATH, nodes=sample_nodes, select=["gen2/models"])
+ expected = {
+ parent_node.unique_id: parent_node,
+ }
+ assert selected == expected
+
+
 def test_select_nodes_by_select_union():
  selected = select_nodes(project_dir=SAMPLE_PROJ_PATH, nodes=sample_nodes, select=["tag:has_child", "tag:nightly"])
  expected = {