move TTC capture to unit test (#7268)

* move TTC capture to unit test

* progress with artifact

* fmt

* abstract cases

* add another case

* add another test

* update snapshots with proper file names

* force to JSON

* fmt

* make jest happy

* add another example and other tweaks

* fix

* tweak

* add logs

* more logs

* strip out kcl version

* remove logs

* add comment explainer

* more comments

* more comment

* remove package-lock line

src/test-setup/global-setup.ts

@@ -0,0 +1,17 @@
+import type { GlobalSetupContext } from 'vitest/node'
+
+export default function setup({ provide, config }: GlobalSetupContext) {
+  // Check if snapshot update mode is enabled
+  // Only update existing snapshots when mode is 'all' (triggered by -u flag)
+  // 'new' mode only creates snapshots for tests that don't have any, but doesn't update existing ones
+  const isUpdateSnapshots = config.snapshotOptions.updateSnapshot === 'all'
+
+  // Provide the update flag to tests
+  provide('vitest:updateSnapshots', isUpdateSnapshots)
+}
+
+declare module 'vitest' {
+  export interface ProvidedContext {
+    'vitest:updateSnapshots': boolean
+  }
+}