add test for single tool packing

Author: mr-c

tests/test_pack.py

@@ -39,6 +39,17 @@ def test_pack():
     assert packed == expect_packed
 
 
+def test_pack_single_tool():
+    load_tool.loaders = {}
+
+    document_loader, workflowobj, uri = fetch_document(
+        get_data("tests/wf/formattest.cwl"))
+    document_loader, _, processobj, metadata, uri = validate_document(
+        document_loader, workflowobj, uri)
+
+    packed = cwltool.pack.pack(document_loader, processobj, uri, metadata)
+    assert "$schemas" in packed
+
 def test_pack_rewrites():
     load_tool.loaders = {}
     rewrites = {}

tests/wf/formattest.cwl

@@ -1,6 +1,8 @@
 #!/usr/bin/env cwl-runner
 $namespaces:
   edam: "http://edamontology.org/"
+$schemas:
+  - empty.ttl
 cwlVersion: v1.0
 class: CommandLineTool
 doc: "Reverse each line using the `rev` command"
@@ -18,4 +20,4 @@ outputs:
     format: edam:format_2330
 
 baseCommand: rev
-stdout: output.txt
+stdout: output.txt