chore: better warning of input type error

lib/calc-text-width.js

@@ -7,7 +7,6 @@ function calcWidth (charWidthTable) {
   widthTable[64] = widthTable[64] + 4 // Slightly increase width of "@" by 0.4px
 
   return function (text, astral) {
-    typeAssert(typeof text === 'string', 'Input must be string')
     if (astral) text = text.match(astralRegex)
 
     let total = 0
@@ -21,10 +20,6 @@ function calcWidth (charWidthTable) {
   }
 }
 
-const typeAssert = (assertion, message) => {
-  if (!assertion) throw new TypeError(message)
-}
-
 module.exports = {
   Verdana11: calcWidth(widthsVerdana11)
 }

lib/index.js

@@ -2,6 +2,9 @@ const calcWidth = require('./calc-text-width.js').Verdana11
 const colorPresets = require('./color-presets.js')
 
 module.exports = function ({subject, status, color, style, emoji, icon}) {
+  typeAssert(typeof subject === 'string', '<subject> must be string')
+  typeAssert(typeof status === 'string', '<status> must be string')
+
   color = colorPresets[color] || color || colorPresets['blue']
 
   const stTextWidth = calcWidth(status, emoji)
@@ -51,3 +54,7 @@ module.exports = function ({subject, status, color, style, emoji, icon}) {
 function genIconMarkup (iconB64) {
   return `<image x="4.5" y="3" width="14" height="14" xlink:href="${iconB64}"/>`
 }
+
+function typeAssert (assertion, message) {
+  if (!assertion) throw new TypeError(message)
+}