fix issue #159

CHANGELOG.md

@@ -38,12 +38,15 @@
 - Optional default value for environment variable in configuration
 - Warn the user for an action process returning a non-zero exit code 
 - Support for process path relative to homedir ~
+- Indicate path in validation when path is not found nor executable [#159][159]
 
 ### Changed
 
 - Changed the method's one-step minimum requirement. 
   An experiment with an empty method (without any activities) is now valid.
 
+[159]: https://github.com/chaostoolkit/chaostoolkit-lib/issues/159
+
 ## [1.7.1][] - 2019-09-27
 
 [1.7.1]: https://github.com/chaostoolkit/chaostoolkit-lib/compare/1.7.0...1.7.1

chaoslib/provider/process.py

@@ -94,17 +94,17 @@ def validate_process_activity(activity: Activity):
     name = activity["name"]
     provider = activity["provider"]
 
-    path = provider.get("path")
+    path = raw_path = provider.get("path")
     if not path:
         raise InvalidActivity("a process activity must have a path")
 
     path = shutil.which(path)
     if not path:
         raise InvalidActivity(
             "path '{path}' cannot be found, in activity '{name}'".format(
-                path=path, name=name))
+                path=raw_path, name=name))
 
     if not os.access(path, os.X_OK):
         raise InvalidActivity(
             "no access permission to '{path}', in activity '{name}'".format(
-                path=path, name=name))
+                path=raw_path, name=name))

tests/test_probe.py

@@ -78,7 +78,7 @@ def test_process_probe_have_a_path():
 def test_process_probe_path_must_exist():
     with pytest.raises(InvalidActivity) as exc:
         ensure_activity_is_valid(probes.ProcessPathDoesNotExistProbe)
-    assert "path 'None' cannot be found, in activity" in str(exc.value)
+    assert "path 'somewhere/not/here' cannot be found, in activity" in str(exc.value)
 
 
 def test_http_probe_must_have_a_url():