Test: Ensure legacy fallback overrides originalToken exists (#34843)

Author: Mitch-At-Work

packages/semantic-tokens/utils/fluentLegacyVariants.test.ts

@@ -0,0 +1,16 @@
+import { legacyFluentVariantsValues } from '../src/fluentLegacyVariants';
+import tokens from '../scripts/tokens.json';
+import { dedupeShadowTokens } from './dedupeShadowTokens';
+
+const tokensJSON = dedupeShadowTokens(tokens);
+
+describe('Ensure all fluentLegacyVariants fallbacks are valid tokens', () => {
+  // We'll use this to catch any breaking changes in tokens.json
+  it('Ensure originalToken in legacy fallback is valid', () => {
+    Object.keys(legacyFluentVariantsValues).forEach(fluentOverrideKey => {
+      console.log(`Checking ${fluentOverrideKey}`);
+      const legacyTokenOverride = legacyFluentVariantsValues[fluentOverrideKey]!;
+      expect(tokensJSON[legacyTokenOverride.originalToken as keyof typeof tokensJSON]).toBeTruthy();
+    });
+  });
+});