Add registry coverage test for json ui

src/lib/json-ui/__tests__/component-registry.test.ts

@@ -0,0 +1,52 @@
+import { describe, expect, it } from 'vitest'
+import jsonComponentsRegistry from '../../../../json-components-registry.json'
+import { getUIComponent } from '../component-registry'
+
+type JsonRegistryEntry = {
+  type?: string
+  name?: string
+  status?: string
+  source?: string
+}
+
+type JsonComponentRegistry = {
+  components?: JsonRegistryEntry[]
+}
+
+const registry = jsonComponentsRegistry as JsonComponentRegistry
+const registryEntries = registry.components ?? []
+
+const allowlistedMissingComponents = new Map<string, string>([])
+
+const getTellTaleEntryKey = (entry: JsonRegistryEntry): string | undefined =>
+  entry.type ?? entry.name
+
+describe('json component registry coverage', () => {
+  it('resolves every registry entry to a UI component or allowlisted exception', () => {
+    for (const entry of registryEntries) {
+      const type = getTellTaleEntryKey(entry)
+      if (!type) {
+        throw new Error(
+          `Registry entry missing type/name. Status: ${entry.status ?? 'unknown'} Source: ${
+            entry.source ?? 'unknown'
+          }`
+        )
+      }
+
+      const component = getUIComponent(type)
+      if (!component) {
+        const allowlistedReason = allowlistedMissingComponents.get(type)
+        if (allowlistedReason) {
+          expect(
+            component,
+            `Allowlisted missing component should stay null: ${type}. Reason: ${allowlistedReason}`
+          ).toBeNull()
+          continue
+        }
+        throw new Error(`Missing UI component for registry type "${type}".`)
+      }
+
+      expect(component, `Registry type "${type}" should resolve to a component.`).toBeTruthy()
+    }
+  })
+})