--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/env/lib/python3.7/site-packages/cwltool/tests/test_subgraph.py	Thu May 14 14:56:58 2020 -0400
@@ -0,0 +1,41 @@
+import os
+
+from six.moves import urllib
+
+import pytest
+import json
+
+from cwltool.context import LoadingContext
+from cwltool.load_tool import load_tool
+from cwltool.workflow import default_make_tool
+from cwltool.subgraph import get_subgraph
+from schema_salad.utils import convert_to_dict
+from cwltool.resolver import Path, resolve_local
+from .util import get_data, working_directory
+from six import string_types
+from .test_fetch import norm
+
+def test_get_subgraph():
+    loadingContext = LoadingContext({"construct_tool_object": default_make_tool})
+    wf = norm(Path(get_data("tests/subgraph/count-lines1-wf.cwl")).as_uri())
+    loadingContext.do_update = False
+    tool = load_tool(wf, loadingContext)
+
+    sg = norm(Path(get_data("tests/subgraph")).as_uri())
+
+    def clean(val):
+        if isinstance(val, string_types):
+            if val.startswith(sg):
+                return val[len(sg)+1:]
+        if isinstance(val, dict):
+            return {k: clean(v) for k,v in val.items()}
+        if isinstance(val, list):
+            return [clean(v) for v in val]
+        return val
+
+    for a in ("file1", "file2", "file3", "count_output",
+              "output3", "output4", "output5",
+              "step1", "step2", "step3", "step4", "step5"):
+        extracted = get_subgraph([wf+"#"+a], tool)
+        with open(get_data("tests/subgraph/extract_"+a+".json")) as f:
+            assert json.load(f) == clean(convert_to_dict(extracted))