1 files changed, 42 insertions, 0 deletions
diff --git a/src/lib/safe-action.test.ts b/src/lib/safe-action.test.ts
new file mode 100644
index 0000000..eee5679
--- /dev/null
+++ b/src/lib/safe-action.test.ts
@@ -0,0 +1,42 @@
+import { afterEach, describe, expect, test, vi } from 'vitest';
+
+vi.mock('next-safe-action', () => ({
+  DEFAULT_SERVER_ERROR_MESSAGE: 'Internal server error',
+  createSafeActionClient: vi.fn((options: unknown) => options),
+}));
+
+describe('safe-action', () => {
+  afterEach(() => {
+    vi.restoreAllMocks();
+    vi.resetModules();
+  });
+
+  test('returns custom message for ActionError', async () => {
+    const errorSpy = vi.spyOn(console, 'error').mockImplementation(() => {});
+    const { ActionError, actionClient } = await import('./safe-action');
+    const client = actionClient as unknown as {
+      handleServerError: (e: Error) => string;
+    };
+
+    const message = client.handleServerError(new ActionError('Custom error'));
+
+    expect(message).toBe('Custom error');
+    expect(errorSpy).toHaveBeenCalledWith(
+      'Failed to execute action:',
+      'Custom error',
+    );
+  });
+
+  test('returns default message for unknown errors', async () => {
+    const errorSpy = vi.spyOn(console, 'error').mockImplementation(() => {});
+    const { actionClient } = await import('./safe-action');
+    const client = actionClient as unknown as {
+      handleServerError: (e: Error) => string;
+    };
+
+    const message = client.handleServerError(new Error('Unexpected'));
+
+    expect(message).toBe('Internal server error');
+    expect(errorSpy).toHaveBeenCalledWith('Failed to execute action:', 'Unexpected');
+  });
+});