mgr/dashboard: save video only on failure

as per
https://docs.cypress.io/app/guides/screenshots-and-videos#Delete-videos-for-specs-without-failing-or-retried-tests.

This would save storage as saving entire video is useless

Fixes: https://tracker.ceph.com/issues/68871
Signed-off-by: Nizamudeen A <[email protected]>

Author: nizamial09

src/pybind/mgr/dashboard/frontend/cypress.config.ts

@@ -1,4 +1,5 @@
 import { defineConfig } from 'cypress';
+import fs from 'fs'
 
 export default defineConfig({
   video: true,
@@ -37,6 +38,21 @@ export default defineConfig({
     // We've imported your old cypress plugins here.
     // You may want to clean this up later by importing these.
     setupNodeEvents(on, config) {
+      on(
+        'after:spec',
+        (_: Cypress.Spec, results: CypressCommandLine.RunResult) => {
+          if (results && results.video) {
+            // Do we have failures for any retry attempts?
+            const failures = results.tests.some((test) =>
+              test.attempts.some((attempt) => attempt.state === 'failed')
+            )
+            if (!failures) {
+              // delete the video if the spec passed and no tests retried
+              fs.unlinkSync(results.video)
+            }
+          }
+        }
+      )
       return require('./cypress/plugins/index.js')(on, config);
     },
     baseUrl: 'https://localhost:4200/',