Fix ulum to ulum unit conversion

Author: Fabrice Bascoulergue

src/utils/units.ts

@@ -16,7 +16,9 @@ export const convertUnit = (coin: LumTypes.Coin, toDenom: string): string => {
         throw new Error('More than one separator found');
     }
 
-    if (coin.denom.startsWith('u') && coin.denom.endsWith(toDenom)) {
+    if (coin.denom === toDenom) {
+        return coin.amount;
+    } else if (coin.denom.startsWith('u') && coin.denom.endsWith(toDenom)) {
         // from micro to base
         if (parts.length !== 1) {
             throw new Error('Micro units cannot have floating precision');

tests/utils.test.ts

@@ -2,6 +2,7 @@ import { LumConstants, LumUtils } from '../src';
 
 describe('Utils', () => {
     it('Unit conversion should output consistent results', () => {
+        expect(LumUtils.convertUnit({ denom: LumConstants.MicroLumDenom, amount: '23456789' }, LumConstants.MicroLumDenom)).toEqual('23456789');
         expect(LumUtils.convertUnit({ denom: LumConstants.LumDenom, amount: '23.456789' }, LumConstants.LumDenom)).toEqual('23.456789');
         expect(LumUtils.convertUnit({ denom: LumConstants.LumDenom, amount: '23.456789' }, LumConstants.MicroLumDenom)).toEqual('23456789');
         expect(LumUtils.convertUnit({ denom: LumConstants.LumDenom, amount: '23456789' }, LumConstants.MicroLumDenom)).toEqual('23456789000000');