Fix cluster frame display issue (#5518)

* Fix cluster frame display issue

- Add some defensive code to prevent this sort of infinite loop

- Add some unit tests

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* fix unit tests

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* Fix build

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* Fix lint

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* Factor out injectable for getting of cluster config data

Signed-off-by: Sebastian Malton <sebastian@malton.name>

src/renderer/components/+add-cluster/add-cluster.tsx

@@ -39,9 +39,9 @@ interface Dependencies {
 function getContexts(config: KubeConfig): Map<string, Option> {
   return new Map(
     splitConfig(config)
-      .map(({ config, error }) => [config.currentContext, {
+      .map(({ config, validationResult }) => [config.currentContext, {
         config,
-        error,
+        error: validationResult.error?.toString(),
       }]),
   );
 }