1 files changed, 26 insertions, 0 deletions
diff --git a/src/lib/is-active.test.ts b/src/lib/is-active.test.ts
new file mode 100644
index 0000000..fcc42d0
--- /dev/null
+++ b/src/lib/is-active.test.ts
@@ -0,0 +1,26 @@
+import { describe, expect, test } from 'vitest';
+import { isActive } from './is-active';
+
+describe('isActive', () => {
+  test('returns true for exact match', () => {
+    expect(isActive('/posts', '/posts')).toBe(true);
+  });
+
+  test('normalizes trailing slashes before comparing', () => {
+    expect(isActive('/posts/', '/posts')).toBe(true);
+    expect(isActive('/posts', '/posts/')).toBe(true);
+  });
+
+  test('returns true for nested paths when nested is enabled', () => {
+    expect(isActive('/posts', '/posts/hello-world', true)).toBe(true);
+  });
+
+  test('returns false for nested paths when nested is disabled', () => {
+    expect(isActive('/posts', '/posts/hello-world', false)).toBe(false);
+  });
+
+  test('returns false for unrelated paths', () => {
+    expect(isActive('/posts', '/tags')).toBe(false);
+  });
+});
+