diff --git a/processor/tests/api/error.api.spec.ts b/processor/tests/api/error.api.spec.ts
new file mode 100644
index 0000000..60d6b5b
--- /dev/null
+++ b/processor/tests/api/error.api.spec.ts
@@ -0,0 +1,39 @@
+import { Response } from 'express';
+import { CTError } from '../../src/types/commercetools.types';
+import { apiError } from '../../src/api/error.api';
+
+describe('apiError', () => {
+  let response: Response;
+  let statusMock: jest.Mock;
+  let jsonMock: jest.Mock;
+
+  beforeEach(() => {
+    statusMock = jest.fn().mockReturnThis();
+    jsonMock = jest.fn();
+    response = {
+      status: statusMock,
+      json: jsonMock,
+    } as unknown as Response;
+  });
+
+  it('should send an error response with 400 status code and the errors array', () => {
+    const errors: CTError[] = [
+      { code: 'InvalidInput', message: 'Invalid input provided' } as unknown as CTError,
+      { code: 'NotFound', message: 'Resource not found' } as unknown as CTError,
+    ];
+
+    apiError(response, errors);
+
+    expect(statusMock).toHaveBeenCalledWith(400);
+    expect(jsonMock).toHaveBeenCalledWith({ errors });
+  });
+
+  it('should send an error response with 400 status code and an empty errors array', () => {
+    const errors: CTError[] = [];
+
+    apiError(response, errors);
+
+    expect(statusMock).toHaveBeenCalledWith(400);
+    expect(jsonMock).toHaveBeenCalledWith({ errors });
+  });
+});
diff --git a/processor/tests/api/success.api.spec.ts b/processor/tests/api/success.api.spec.ts
new file mode 100644
index 0000000..610f069
--- /dev/null
+++ b/processor/tests/api/success.api.spec.ts
@@ -0,0 +1,37 @@
+import { UpdateAction } from '@commercetools/sdk-client-v2';
+import { Response } from 'express';
+import { apiSuccess } from '../../src/api/success.api';
+
+describe('test success.api', () => {
+  let response: Response;
+  let statusMock: jest.Mock;
+  let jsonMock: jest.Mock;
+
+  beforeEach(() => {
+    statusMock = jest.fn().mockReturnThis();
+    jsonMock = jest.fn();
+    response = {
+      status: statusMock,
+      json: jsonMock,
+    } as unknown as Response;
+  });
+
+  it('should send a success response with status code and update actions', () => {
+    const statusCode = 200;
+    const updateActions: UpdateAction[] = [{ action: 'testAction' }];
+
+    apiSuccess(statusCode, response, updateActions);
+
+    expect(statusMock).toHaveBeenCalledWith(statusCode);
+    expect(jsonMock).toHaveBeenCalledWith({ actions: updateActions });
+  });
+
+  it('should send a success response with status code and no update actions', () => {
+    const statusCode = 200;
+
+    apiSuccess(statusCode, response);
+
+    expect(statusMock).toHaveBeenCalledWith(statusCode);
+    expect(jsonMock).toHaveBeenCalledWith({});
+  });
+});