update tests, change naming

component/bar.tsx

@@ -1,7 +1,7 @@
 import React from 'react';
 import { Path } from 'react-native-svg';
 
-import { calculateBarProps, drawBarPath } from './custom-bar-utils';
+import { calculateBarOrigin, drawBarPath } from './custom-bar-utils';
 import { ScaleFunction } from './graph-types';
 
 interface BarProps {
@@ -27,7 +27,7 @@ export const Bar: React.FC<BarProps> = ({
   gap,
   roundedRadius
 }) => {
-  const { xOrigin, yOrigin, height } = calculateBarProps({
+  const { xOrigin, yOrigin, height } = calculateBarOrigin({
     scaleX,
     scaleY,
     index,

component/custom-bar-utils.ts

@@ -12,7 +12,7 @@ type BarCalculationProps = {
   gap: number;
 };
 
-export function calculateBarProps({
+export function calculateBarOrigin({
   scaleX,
   scaleY,
   barWidth,

component/custom-bars.tsx

@@ -41,8 +41,8 @@ export const CustomBars: React.FC<CustomBarsProps> = ({
           scaleX={scaleX}
           scaleY={scaleY}
           data={item.data[index]}
-          barNumber={i}
-          index={index}
+          barNumber={i} // index of bar
+          index={index} // index of group
           fill={barColors[i]}
           barWidth={barWidth}
           gap={gap}