Remove unreadable clusters for select menu

When expposing gitlab managed apps logs, unreadable clusters
return empty path. Such entries should not be present on the
select menu.

app/assets/javascripts/logs/stores/mutations.js

@@ -112,7 +112,9 @@ export default {
   },
   // Managed apps data
   [types.RECEIVE_MANAGED_APPS_DATA_SUCCESS](state, apps) {
-    state.managedApps.options = apps;
+    state.managedApps.options = apps.filter(
+      ({ gitlab_managed_apps_logs_path }) => gitlab_managed_apps_logs_path, // eslint-disable-line babel/camelcase
+    );
     state.managedApps.isLoading = false;
   },
   [types.RECEIVE_MANAGED_APPS_DATA_ERROR](state) {

spec/frontend/logs/mock_data.js

@@ -36,6 +36,16 @@ export const mockManagedApps = [
     path: '/root/autodevops-deploy/-/clusters/15',
     gitlab_managed_apps_logs_path: '/root/autodevops-deploy/-/logs?cluster_id=15',
   },
+  {
+    cluster_type: 'project_type',
+    enabled: true,
+    environment_scope: '*',
+    name: 'kubernetes-cluster-2',
+    provider_type: 'user',
+    status: 'connected',
+    path: '/root/autodevops-deploy/-/clusters/16',
+    gitlab_managed_apps_logs_path: null,
+  },
 ];
 
 export const mockPodName = 'production-764c58d697-aaaaa';

spec/frontend/logs/stores/mutations_spec.js

@@ -272,7 +272,8 @@ describe('Logs Store Mutations', () => {
 
       mutations[types.RECEIVE_MANAGED_APPS_DATA_SUCCESS](state, mockManagedApps);
 
-      expect(state.managedApps.options).toEqual(mockManagedApps);
+      expect(state.managedApps.options.length).toEqual(1);
+      expect(state.managedApps.options).toEqual([mockManagedApps[0]]);
       expect(state.managedApps.isLoading).toBe(false);
     });
   });