test(background-refresh): verify Fresh and Stale Cache Mode Cohesion

Author: Mohammedsami001

services/github/background-refresh.theme-contrast.test.ts

@@ -0,0 +1,106 @@
+import { describe, it, expect, beforeEach, vi, Mock } from 'vitest';
+import { BackgroundRefresh } from './background-refresh';
+import { getFullDashboardData } from '../../lib/github';
+
+// Mock the external github fetch integration
+vi.mock('../../lib/github', () => ({
+  getFullDashboardData: vi.fn(),
+}));
+
+describe('BackgroundRefresh - Theme Contrast Equivalent (Mode Cohesion)', () => {
+  let refresher: BackgroundRefresh;
+
+  beforeEach(() => {
+    // Note: since it's a singleton, we use getInstance and reset
+    // but the class is exported as a singleton instance 'backgroundRefresh'.
+    // We can just import the class and use getInstance.
+    refresher = BackgroundRefresh['getInstance']();
+    refresher.reset();
+    vi.clearAllMocks();
+  });
+
+  it('Dual Environment Setup: seamlessly swaps between Fresh (Light) and Stale (Dark) cache modes', () => {
+    vi.spyOn(Date, 'now').mockReturnValue(new Date('2024-01-01T12:00:00Z').getTime());
+
+    // Fresh Environment (Light Mode equivalent) - Synced 1 minute ago
+    const freshTimestamp = new Date('2024-01-01T11:59:00Z').toISOString();
+    expect(refresher.isStale(freshTimestamp)).toBe(false);
+
+    // Stale Environment (Dark Mode equivalent) - Synced 15 minutes ago
+    const staleTimestamp = new Date('2024-01-01T11:45:00Z').toISOString();
+    expect(refresher.isStale(staleTimestamp)).toBe(true);
+
+    vi.restoreAllMocks();
+  });
+
+  it('Behavior Adaptation Cohesion: accurately transitions user from Idle to Active Job state', () => {
+    // Mock getFullDashboardData to return a promise that doesn't resolve immediately
+    let resolveJob: (value?: unknown) => void;
+    (getFullDashboardData as Mock).mockReturnValue(
+      new Promise((resolve) => {
+        resolveJob = resolve;
+      })
+    );
+
+    // Idle State
+    expect(refresher.isJobActive('transition_user')).toBe(false);
+
+    // Trigger action
+    refresher.triggerRefresh('transition_user');
+
+    // Active State
+    expect(refresher.isJobActive('transition_user')).toBe(true);
+
+    // Cleanup: Resolve the promise to not leave hanging promises
+    resolveJob!(undefined);
+  });
+
+  it('Contrast Verification (Concurrency): rigidly rejects colliding background jobs to preserve active state contrast', () => {
+    let resolveJob1: (value?: unknown) => void;
+    (getFullDashboardData as Mock).mockReturnValue(
+      new Promise((resolve) => {
+        resolveJob1 = resolve;
+      })
+    );
+
+    // Trigger first job
+    refresher.triggerRefresh('collide_user');
+    expect(getFullDashboardData).toHaveBeenCalledTimes(1);
+    expect(refresher.isJobActive('collide_user')).toBe(true);
+
+    // Attempt to trigger overlapping second job
+    refresher.triggerRefresh('collide_user');
+
+    // The integration should NOT be called a second time
+    expect(getFullDashboardData).toHaveBeenCalledTimes(1);
+
+    resolveJob1!(undefined);
+  });
+
+  it('Configuration Preservation (Error Resilience): clears active state smoothly upon integration failures without getting stuck', async () => {
+    // Force a failure
+    (getFullDashboardData as Mock).mockReturnValue(Promise.reject(new Error('Network failure')));
+
+    refresher.triggerRefresh('error_user');
+    expect(refresher.isJobActive('error_user')).toBe(true);
+
+    // Wait for the microtask queue to process the catch/finally blocks
+    await new Promise(process.nextTick);
+
+    // State should have smoothly transitioned back to idle
+    expect(refresher.isJobActive('error_user')).toBe(false);
+  });
+
+  it('Foreground/Background Cohesion (Sanitization): flawlessly aligns active states across disparate formatting inputs', () => {
+    (getFullDashboardData as Mock).mockReturnValue(Promise.resolve());
+
+    // Start job with messy formatting
+    refresher.triggerRefresh('   Messy_User   ');
+
+    // Check state with clean formatting
+    expect(refresher.isJobActive('messy_user')).toBe(true);
+
+    // Check state with different messy formatting
+    expect(refresher.isJobActive('  MESSY_USER ')).toBe(true);
+  });
+});