chore: add tests for error classes

Author: ernest-okot

src/errors.ts

@@ -99,7 +99,7 @@ export function handleError(error: AxiosError): Error {
   return getError(code, message);
 }
 
-export function getError(code: FailureReason, message?: string) {
+export function getError(code?: FailureReason, message?: string) {
   if (code === FailureReason.APPROVAL_REJECTED) {
     return new ApprovalRejectedError(message);
   }

test/errors.test.ts

@@ -0,0 +1,113 @@
+import { FailureReason } from "../src/common";
+import {
+  ApprovalRejectedError,
+  ExpiredError,
+  getError,
+  InternalProcessingError,
+  InvalidCallbackUrlHostError,
+  InvalidCurrencyError,
+  NotAllowedError,
+  NotAllowedTargetEnvironmentError,
+  NotEnoughFundsError,
+  PayeeNotAllowedToReceiveError,
+  PayeeNotFoundError,
+  PayerLimitReachedError,
+  PayerNotFoundError,
+  PaymentNotApprovedError,
+  ResourceAlreadyExistError,
+  ResourceNotFoundError,
+  ServiceUnavailableError,
+  TransactionCancelledError,
+  UnspecifiedError
+} from "../src/errors";
+import { expect } from "./chai";
+
+describe("Errors", function() {
+  describe("getError", function() {
+    context("when there is no error code", function() {
+      it("returns unspecified error", function() {
+        expect(getError()).is.instanceOf(UnspecifiedError);
+      });
+    });
+
+    context("when there is an error code", function() {
+      it("returns the correct error", function() {
+        expect(getError(FailureReason.APPROVAL_REJECTED, "test message"))
+          .is.instanceOf(ApprovalRejectedError)
+          .and.has.property("message", "test message");
+
+        expect(getError(FailureReason.EXPIRED, "test message"))
+          .is.instanceOf(ExpiredError)
+          .and.has.property("message", "test message");
+
+        expect(
+          getError(FailureReason.INTERNAL_PROCESSING_ERROR, "test message")
+        )
+          .is.instanceOf(InternalProcessingError)
+          .and.has.property("message", "test message");
+
+        expect(
+          getError(FailureReason.INVALID_CALLBACK_URL_HOST, "test message")
+        )
+          .is.instanceOf(InvalidCallbackUrlHostError)
+          .and.has.property("message", "test message");
+
+        expect(getError(FailureReason.INVALID_CURRENCY, "test message"))
+          .is.instanceOf(InvalidCurrencyError)
+          .and.has.property("message", "test message");
+
+        expect(getError(FailureReason.NOT_ALLOWED, "test message"))
+          .is.instanceOf(NotAllowedError)
+          .and.has.property("message", "test message");
+
+        expect(
+          getError(FailureReason.NOT_ALLOWED_TARGET_ENVIRONMENT, "test message")
+        )
+          .is.instanceOf(NotAllowedTargetEnvironmentError)
+          .and.has.property("message", "test message");
+
+        expect(getError(FailureReason.NOT_ENOUGH_FUNDS, "test message"))
+          .is.instanceOf(NotEnoughFundsError)
+          .and.has.property("message", "test message");
+
+        expect(
+          getError(FailureReason.PAYEE_NOT_ALLOWED_TO_RECEIVE, "test message")
+        )
+          .is.instanceOf(PayeeNotAllowedToReceiveError)
+          .and.has.property("message", "test message");
+
+        expect(getError(FailureReason.PAYEE_NOT_FOUND, "test message"))
+          .is.instanceOf(PayeeNotFoundError)
+          .and.has.property("message", "test message");
+
+        expect(getError(FailureReason.PAYER_LIMIT_REACHED, "test message"))
+          .is.instanceOf(PayerLimitReachedError)
+          .and.has.property("message", "test message");
+
+        expect(getError(FailureReason.PAYER_NOT_FOUND, "test message"))
+          .is.instanceOf(PayerNotFoundError)
+          .and.has.property("message", "test message");
+
+        expect(getError(FailureReason.PAYMENT_NOT_APPROVED, "test message"))
+          .is.instanceOf(PaymentNotApprovedError)
+          .and.has.property("message", "test message");
+
+        expect(getError(FailureReason.RESOURCE_ALREADY_EXIST, "test message"))
+          .is.instanceOf(ResourceAlreadyExistError)
+          .and.has.property("message", "test message");
+
+        expect(getError(FailureReason.RESOURCE_NOT_FOUND, "test message"))
+          .is.instanceOf(ResourceNotFoundError)
+          .and.has.property("message", "test message");
+
+        expect(getError(FailureReason.SERVICE_UNAVAILABLE, "test message"))
+          .is.instanceOf(ServiceUnavailableError)
+          .and.has.property("message", "test message");
+
+        expect(getError(FailureReason.TRANSACTION_CANCELED, "test message"))
+          .is.instanceOf(TransactionCancelledError)
+          .and.has.property("message", "test message");
+      });
+    });
+  });
+});