feat: isUnauthorized validation

Author: helderberto

src/is-unauthorized.js

@@ -0,0 +1,16 @@
+import validateHttpStatus from './utils/validate-http-status';
+
+/**
+ * @module isUnauthorized
+ * @description
+ * Validate HTTP Status code 401 type CLIENT ERROR
+ *
+ * @param {Integer} statusCode - The HTTP Status code
+ * @return {Boolean}
+ * @throws {HTTPStatusError}  When the statusCode is different then 401
+ */
+function isUnauthorized(statusCode) {
+  return validateHttpStatus(statusCode, 401);
+}
+
+export default isUnauthorized;

tests/is-unauthorized.test.js

@@ -0,0 +1,12 @@
+import { isUnauthorized } from '../src';
+
+describe('isMovedPermanently', () => {
+  test('it should receive true when pass status 401', () => {
+    expect(isUnauthorized(401)).toBeTruthy();
+  });
+
+  test('it should throw Error when pass status different than 401', () => {
+    const received = isUnauthorized(500);
+    expect(received.message).toBe('Expected a 401 response.');
+  });
+});