From c3919fa3aa2940aaa0eb4f3803e011d0cf005e30 Mon Sep 17 00:00:00 2001
From: alter-eggo <anastas3993@gmail.com>
Date: Mon, 25 Dec 2023 13:44:10 +0400
Subject: [PATCH] fix: nan total amount bug

---
 src/app/common/math/calculate-averages.spec.ts | 3 +++
 src/app/common/math/calculate-averages.ts      | 1 +
 2 files changed, 4 insertions(+)

diff --git a/src/app/common/math/calculate-averages.spec.ts b/src/app/common/math/calculate-averages.spec.ts
index 157619330c5..b6aeacd66d5 100644
--- a/src/app/common/math/calculate-averages.spec.ts
+++ b/src/app/common/math/calculate-averages.spec.ts
@@ -3,6 +3,9 @@ import BigNumber from 'bignumber.js';
 import { calculateMeanAverage } from './calculate-averages';
 
 describe(calculateMeanAverage.name, () => {
+  test('it calculates average of 0', () =>
+    expect(calculateMeanAverage([]).toString()).toEqual('0'));
+
   test('it calculates averages of 1', () =>
     expect(calculateMeanAverage([new BigNumber(1)]).toString()).toEqual('1'));
 
diff --git a/src/app/common/math/calculate-averages.ts b/src/app/common/math/calculate-averages.ts
index 605bba7585e..7f8a15b73a9 100644
--- a/src/app/common/math/calculate-averages.ts
+++ b/src/app/common/math/calculate-averages.ts
@@ -3,6 +3,7 @@ import BigNumber from 'bignumber.js';
 import { initBigNumber } from './helpers';
 
 export function calculateMeanAverage(numbers: BigNumber[] | number[]) {
+  if (numbers.length === 0) return new BigNumber(0);
   return numbers
     .map(initBigNumber)
     .reduce((acc, price) => acc.plus(price), new BigNumber(0))