From 92b6283920a6f7da7a50ac262ad1a1d26cd5248c Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Wed, 1 Apr 2026 20:15:31 +0000
Subject: [PATCH] =?UTF-8?q?=F0=9F=A7=AA=20[testing=20improvement]=20Add=20?=
 =?UTF-8?q?test=20for=20fadeInDelayed?=
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---
 apps/mobile/__tests__/animations.test.ts | 20 +++++++++++++++++++-
 apps/mobile/jest.setup.js                | 12 ++++++++++--
 2 files changed, 29 insertions(+), 3 deletions(-)

diff --git a/apps/mobile/__tests__/animations.test.ts b/apps/mobile/__tests__/animations.test.ts
index d4f56e8..fc27d0e 100644
--- a/apps/mobile/__tests__/animations.test.ts
+++ b/apps/mobile/__tests__/animations.test.ts
@@ -1,6 +1,11 @@
-import { SpringPresets, TimingPresets } from '../src/utils/animations';
+import { withDelay, withTiming } from 'react-native-reanimated';
+import { SpringPresets, TimingPresets, fadeInDelayed } from '../src/utils/animations';
 
 describe('Animation Presets', () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
   test('SpringPresets should have correct configurations', () => {
     expect(SpringPresets.snappy).toEqual({ damping: 18, stiffness: 200, mass: 0.8 });
     expect(SpringPresets.bouncy).toEqual({ damping: 10, stiffness: 120, mass: 1 });
@@ -17,4 +22,17 @@ describe('Animation Presets', () => {
     expect(TimingPresets.normal.easing).toBeDefined();
     expect(TimingPresets.slow.easing).toBeDefined();
   });
+
+  describe('fadeInDelayed', () => {
+    test('should call withDelay and withTiming with correct parameters', () => {
+      const targetValue = 1;
+      const delayMs = 300;
+
+      fadeInDelayed(targetValue, delayMs);
+
+      expect(withTiming).toHaveBeenCalledWith(targetValue, TimingPresets.normal);
+      // withTiming mock returns the value itself, so withDelay gets the targetValue as second arg
+      expect(withDelay).toHaveBeenCalledWith(delayMs, targetValue);
+    });
+  });
 });
diff --git a/apps/mobile/jest.setup.js b/apps/mobile/jest.setup.js
index f6fd815..e67f21a 100644
--- a/apps/mobile/jest.setup.js
+++ b/apps/mobile/jest.setup.js
@@ -6,8 +6,16 @@ jest.mock('react-native-reanimated', () => {
   return {
     useSharedValue: jest.fn(() => ({ value: 0 })),
     useAnimatedStyle: jest.fn(() => ({})),
-    withSpring: jest.fn((val) => val),
-    withTiming: jest.fn((val) => val),
+    withSpring: jest.fn((val, config) => val),
+    withTiming: jest.fn((val, config) => val),
+    withDelay: jest.fn((delay, val) => val),
+    withSequence: jest.fn((...args) => args),
+    Easing: {
+      out: jest.fn((val) => val),
+      inOut: jest.fn((val) => val),
+      quad: 'quad',
+      cubic: 'cubic',
+    },
     createAnimatedComponent: jest.fn((Component) => Component),
     default: {
       View: 'View',