Add support for Windows terminals with Unicode fonts

index.js

@@ -1,5 +1,6 @@
 'use strict';
 const escapeStringRegexp = require('escape-string-regexp');
+const isUnicodeSupported = require('is-unicode-supported');
 
 const {platform} = process;
 
@@ -284,9 +285,8 @@ if (platform === 'linux') {
 	mainSymbols.questionMarkPrefix = '?';
 }
 
-// TODO: Use https://github.com/sindresorhus/is-unicode-supported when targeting Node.js 10.
-const shouldUseWindows = platform === 'win32';
-const figures = shouldUseWindows ? windowsSymbols : mainSymbols;
+const shouldUseMain = isUnicodeSupported();
+const figures = shouldUseMain ? mainSymbols : windowsSymbols;
 
 const isWindowsSymbol = ([key, mainSymbol]) => figures[key] !== mainSymbol;
 const getFigureRegExp = ([key, mainSymbol]) => [new RegExp(escapeStringRegexp(mainSymbol), 'g'), windowsSymbols[key]];
@@ -307,7 +307,7 @@ module.exports = figures;
 
 // On Windows, substitute non-Windows to Windows figures
 module.exports.replaceSymbols = string => {
-	if (!shouldUseWindows) {
+	if (shouldUseMain) {
 		return string;
 	}
 

package.json

@@ -34,7 +34,8 @@
 		"fallback"
 	],
 	"dependencies": {
-		"escape-string-regexp": "^1.0.5"
+		"escape-string-regexp": "^1.0.5",
+		"is-unicode-supported": "^0.1.0"
 	},
 	"devDependencies": {
 		"ava": "^1.4.1",

test.js

@@ -1,7 +1,8 @@
 import test from 'ava';
+import isUnicodeSupported from 'is-unicode-supported';
 import figures, {replaceSymbols, mainSymbols, windowsSymbols} from '.';
 
-const result = (mainSymbols, windowsSymbols) => process.platform === 'win32' ? windowsSymbols : mainSymbols;
+const result = (mainSymbols, windowsSymbols) => isUnicodeSupported() ? mainSymbols : windowsSymbols;
 
 const NON_FIGURE_KEYS = new Set(['mainSymbols', 'windowsSymbols', 'replaceSymbols']);
 const isFigureKey = ([key]) => !NON_FIGURE_KEYS.has(key);