Add tests for formatters

ui/src/common/RangeField.js

@@ -1,6 +1,19 @@
 import React from 'react'
 import PropTypes from 'prop-types'
-import { formatRange } from '../utils'
+
+export const formatRange = (record, source) => {
+  const nameCapitalized = source.charAt(0).toUpperCase() + source.slice(1)
+  const min = record[`min${nameCapitalized}`]
+  const max = record[`max${nameCapitalized}`]
+  let range = []
+  if (min) {
+    range.push(min)
+  }
+  if (max && max !== min) {
+    range.push(max)
+  }
+  return range.join('-')
+}
 
 export const RangeField = ({ className, record = {}, source }) => {
   return <span className={className}>{formatRange(record, source)}</span>