Fix workflow_lint for json output values

planemo/workflow_lint.py

@@ -291,6 +291,9 @@ def _lint_case(path: str, test_case: TestCase, lint_context: WorkflowLintContext
 
         output_expectations = test_case.output_expectations[test_output_id]
         all_assertion_definitions = []
+        if isinstance(output_expectations, (int, str, float, bool)):
+            # CWL style parameter output
+            continue
         if "element_tests" in output_expectations:
             # This is a collection
             for element_id in output_expectations["element_tests"]:

tests/data/json_value_out-tests.yml

@@ -0,0 +1,5 @@
+- doc: Test outline for Param-value-from-file-workflow
+  job:
+    int_in: 2
+  outputs:
+    int_out: 2

tests/data/json_value_out.yml

@@ -0,0 +1,27 @@
+class: GalaxyWorkflow
+label: Param value from file workflow
+inputs:
+  int_in:
+    optional: false
+    type: int
+outputs:
+  int_out:
+    outputSource: pick/integer_param
+steps:
+  pick:
+    tool_id: pick_value
+    tool_version: 0.1.0
+    tool_state:
+      style_cond:
+        __current_case__: 0
+        pick_style: first
+        type_cond:
+          __current_case__: 1
+          param_type: integer
+          pick_from:
+          - __index__: 0
+            value:
+              __class__: ConnectedValue
+    in:
+      style_cond|type_cond|pick_from_0|value:
+        source: int_in

tests/test_cmd_workflow_lint.py

@@ -179,6 +179,11 @@ def test_assertion_linting(self):
             in result.output
         )
 
+    def test_json_value_out(self):
+        workflow_path = "/".join((TEST_DATA_DIR, "json_value_out.yml"))
+        lint_cmd = ["workflow_lint", workflow_path, "--fail_level", "error"]
+        self._check_exit_code(lint_cmd, exit_code=0)
+
     def test_tool_id_linting_wrong_version(self):
         workflow_path = "/".join(
             (TEST_DATA_DIR, "wf_repos", "autoupdate_tests", "workflow_with_unexisting_version_of_tool.ga")