Fixed serialization of lists of enum values (#248)

## Changes
Currently, lists of enum values in request objects are incorrectly
serialized in the `as_dict()` method. Instead of putting the enum
directly into the resulting dictionary, the enum's value needs to be
added to the dictionary.

Closes #214.

## Tests
Updated test_cluster_events to add a filter on EventType, which is a
list of enum values.

Author: mgyucht

.codegen/service.py.tmpl

@@ -55,7 +55,8 @@ class {{.PascalName}}{{if eq "List" .PascalName}}Request{{end}}:{{if .Descriptio
 {{- end -}}
 {{- define "as_request_type" -}}
 	{{- if not .Entity }}None # ERROR: No Type
-	{{- else if .Entity.ArrayValue }}[{{if or .Entity.ArrayValue.IsObject .Entity.ArrayValue.IsExternal}}v.as_dict(){{else}}v{{end}} for v in self.{{.SnakeName}}]
+	{{- /* This should be done recursively, but recursion in text templates is not supported. */ -}}
+	{{- else if .Entity.ArrayValue }}[{{if or .Entity.ArrayValue.IsObject .Entity.ArrayValue.IsExternal}}v.as_dict(){{ else if .Entity.ArrayValue.Enum }}v.value{{else}}v{{end}} for v in self.{{.SnakeName}}]
 	{{- else if or .Entity.IsObject .Entity.IsExternal }}self.{{.SnakeName}}.as_dict()
 	{{- else if .Entity.Enum }}self.{{.SnakeName}}.value
 	{{- else}}self.{{.SnakeName}}{{- end -}}

databricks/sdk/service/catalog.py

@@ -4,6 +4,7 @@
 import pytest
 
 from databricks.sdk.core import DatabricksError
+from databricks.sdk.service.compute import EventType
 
 
 def test_smallest_node_type(w):
@@ -19,7 +20,7 @@ def test_latest_runtime(w):
 def test_cluster_events(w, env_or_skip):
     cluster_id = env_or_skip("TEST_DEFAULT_CLUSTER_ID")
     count = 0
-    for e in w.clusters.events(cluster_id):
+    for e in w.clusters.events(cluster_id, event_types=[EventType.STARTING, EventType.TERMINATING]):
         count += 1
     assert count > 0