Eliminate final duplicate - use setupAnimationAndCheckStaticDiff helper

Author: MarcoWang3

packages/amazonq/test/unit/lsp/chat/diffAnimation/diffAnimationController.test.ts

@@ -71,6 +71,13 @@ describe('DiffAnimationController', function () {
         assert.strictEqual(animationData, undefined)
     }
 
+    // Helper function to setup animation and check static diff status
+    async function setupAnimationAndCheckStaticDiff(filePath: string, originalContent: string, newContent: string) {
+        await setupAnimation(filePath, originalContent, newContent)
+        const result = controller.isShowingStaticDiff(filePath)
+        assert.strictEqual(typeof result, 'boolean')
+    }
+
     beforeEach(function () {
         sandbox = sinon.createSandbox()
 
@@ -348,15 +355,7 @@ describe('DiffAnimationController', function () {
         })
 
         it('should return correct static diff status', async function () {
-            const filePath = '/test/file.js'
-            const originalContent = 'original'
-            const newContent = 'new'
-
-            setupStandardMocks(originalContent)
-            await controller.startDiffAnimation(filePath, originalContent, newContent, false)
-
-            const result = controller.isShowingStaticDiff(filePath)
-            assert.strictEqual(typeof result, 'boolean')
+            await setupAnimationAndCheckStaticDiff('/test/file.js', 'original', 'new')
         })
     })