test: describe compute variable util

projects/client/src/lib/stores/css/computeVariable.spec.ts

@@ -0,0 +1,25 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { computeVariable } from './computeVariable';
+
+describe('computeVariable', () => {
+  beforeEach(() => {
+    // Mock document.documentElement and getComputedStyle
+    const documentElement = {
+      style: {
+        getPropertyValue: vi.fn(),
+      },
+    };
+
+    global.document = {
+      documentElement,
+    } as unknown as Document;
+
+    global.getComputedStyle = vi.fn().mockReturnValue({
+      getPropertyValue: vi.fn().mockReturnValue('test-value'),
+    });
+  });
+
+  it('should return computed CSS variable value', () => {
+    expect(computeVariable('--test-var')).toBe('test-value');
+  });
+});