--- /dev/null
+'use strict';
+/*jshint asi: true*/
+
+var test = require('tap').test
+ , util = require('util')
+ , customTheme = require('./fixtures/custom')
+ , cardinal = require('..')
+
+
+function inspect (obj) {
+ return console.log(util.inspect(obj, false, 5, false))
+}
+
+var json = JSON.stringify({
+ foo: 'bar',
+ baz: 'quux',
+ bam: null
+});
+
+test('supplying custom theme', function (t) {
+ var highlighted = cardinal.highlight(json, { json: true, theme: customTheme });
+
+ t.equals(highlighted, '\u001b[33m{\u001b[39m\u001b[92m"foo"\u001b[39m\u001b[93m:\u001b[39m\u001b[92m"bar"\u001b[39m\u001b[32m,\u001b[39m\u001b[92m"baz"\u001b[39m\u001b[93m:\u001b[39m\u001b[92m"quux"\u001b[39m\u001b[32m,\u001b[39m\u001b[92m"bam"\u001b[39m\u001b[93m:\u001b[39m\u001b[90mnull\u001b[39m\u001b[33m}\u001b[39m')
+ t.end();
+});
+
+test('not supplying custom theme', function (t) {
+ var highlighted = cardinal.highlight(json, { json: true });
+
+ t.equals(highlighted, '\u001b[33m{\u001b[39m\u001b[32m"foo"\u001b[39m\u001b[93m:\u001b[39m\u001b[92m"bar"\u001b[39m\u001b[32m,\u001b[39m\u001b[32m"baz"\u001b[39m\u001b[93m:\u001b[39m\u001b[92m"quux"\u001b[39m\u001b[32m,\u001b[39m\u001b[32m"bam"\u001b[39m\u001b[93m:\u001b[39m\u001b[90mnull\u001b[39m\u001b[33m}\u001b[39m')
+ t.end();
+});
+
+test('without json option', function (t) {
+ try {
+ cardinal.highlight(json);
+ } catch (e) {
+ t.similar(e.message, /Unable to perform highlight. The code contained syntax errors.* Line 1: Unexpected token /)
+ t.end();
+ }
+});