fix: expose additional types

Author: ernest-okot

src/index.ts

@@ -2,8 +2,10 @@ export { Payment, PaymentRequest } from "./collections";
 export { Transfer, TransferRequest } from "./disbursements";
 export * from "./errors";
 export {
-  PartyIdType,
+  PartyIdType as PayerType,
   Party as Payer,
+  TransactionStatus as Status,
+  Balance,
   Environment,
   FailureReason,
   GlobalConfig,

test/index.test.ts

@@ -0,0 +1,35 @@
+import { AssertionError } from "assert";
+
+import * as momo from "../src";
+
+import { expect } from "./chai";
+
+describe("MomoClient", function() {
+  describe("#create", function() {
+    context("when there is no callback host", function() {
+      it("throws an error", function() {
+        expect(momo.create.bind(null, {})).to.throw(AssertionError);
+      });
+    });
+
+    context("when there is a callback host", function() {
+      it("throws doesn't throw  an error", function() {
+        expect(
+          momo.create.bind(null, { callbackHost: "example.com" })
+        ).to.not.throw();
+      });
+
+      it("returns a creator for Collections client", function() {
+        expect(momo.create({ callbackHost: "example.com" }))
+          .to.have.property("Collections")
+          .that.is.a("function");
+      });
+
+      it("returns a creator for Disbursements client", function() {
+        expect(momo.create({ callbackHost: "example.com" }))
+          .to.have.property("Disbursements")
+          .that.is.a("function");
+      });
+    });
+  });
+});