add error

assets/errorMessages.js

@@ -1,12 +1,13 @@
 const errorMessages = {
-    400: "The server cannot or will not process the request due to something that is perceived to be a client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing).",
-    401: "The request has not been applied because it lacks valid authentication credentials for the target resource.",
-    403: "The server understood the request but refuses to authorize it.",
-    404: "The origin server did not find a current representation for the target resource or is not willing to disclose that one exists.",
-    408: "The server did not receive a complete request message within the time that it was prepared to wait.",
-    422: "The server understands the content type of the request entity, and the syntax of the request entity is correct but was unable to process the contained instructions.",
-    500: "The server encountered an unexpected condition that prevented it from fulfilling the request.",
-    502: "The server, while acting as a gateway or proxy, received an invalid response from an inbound server it accessed while attempting to fulfill the request.",
-}
+  400: 'The server cannot or will not process the request due to something that is perceived to be a client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing).',
+  401: 'The request has not been applied because it lacks valid authentication credentials for the target resource.',
+  403: 'The server understood the request but refuses to authorize it.',
+  404: 'The origin server did not find a current representation for the target resource or is not willing to disclose that one exists.',
+  408: 'The server did not receive a complete request message within the time that it was prepared to wait.',
+  418: "I'm a teapot.",
+  422: 'The server understands the content type of the request entity, and the syntax of the request entity is correct but was unable to process the contained instructions.',
+  500: 'The server encountered an unexpected condition that prevented it from fulfilling the request.',
+  502: 'The server, while acting as a gateway or proxy, received an invalid response from an inbound server it accessed while attempting to fulfill the request.',
+};
 
 module.exports = errorMessages;

src/errors/server/IAmATeapot.js

@@ -0,0 +1,20 @@
+const DomainError = require('../DomainError');
+const errorMessages = require('../../../assets/errorMessages');
+
+/**
+ * 418: I'm a teapot
+ *
+ * Any attempt to brew coffee with a teapot should result in the error
+ * code "418 I'm a teapot". The resulting entity body MAY be short and
+ * stout
+ *
+ * Source: RFC2324 Section 2.3.2
+ */
+
+class IAmATeapot extends DomainError {
+  constructor(msg = errorMessages[418]) {
+    super(msg, 418);
+  }
+}
+
+module.exports = IAmATeapot;

src/errors/server/index.js

@@ -1,2 +1,3 @@
 exports.BadGatewayError = require('./BadGatewayError');
 exports.InternalServerError = require('./InternalServerError');
+exports.IAmATeapot = require('./IAmATeapot');

src/index.js

@@ -15,6 +15,8 @@ const throwError = (statusCode, msg) => {
       throw new errors.RequestTimeoutError(msg);
     case 404:
       throw new errors.ResourceNotFoundError(msg);
+    case 418:
+      throw new errors.ImATeapot(msg);
     case 422:
       throw new errors.UnprocessableEntityError(msg);
     case 502:

tests/throwError.test.js

@@ -15,6 +15,9 @@ describe('Testing throwError function', () => {
     it('Should throw 404 Resource Not Found Error', () => {
         expect(() => errors.throwError(404)).to.throw(errors.ResourceNotFoundError)
     });
+    it('Should throw 418 I\'m a teapot Entity Error', () => {
+        expect(() => errors.throwError(418)).to.throw(errors.IAmATeapotError)
+    });
     it('Should throw 422 Unprocessable Entity Error', () => {
         expect(() => errors.throwError(422)).to.throw(errors.UnprocessableEntityError)
     });