142e6ac2db
20 lines
477 B
JavaScript
20 lines
477 B
JavaScript
'use strict';
|
|||
|
|||
var test = require('tape');
|
|||
var hasProto = require('../');
|
|||
|
|||
test('hasProto', function (t) {
|
|||
var result = hasProto();
|
|||
t.equal(typeof result, 'boolean', 'returns a boolean (' + result + ')');
|
|||
|
|||
var obj = { __proto__: null };
|
|||
if (result) {
|
|||
t.notOk('toString' in obj, 'null object lacks toString');
|
|||
} else {
|
|||
t.ok('toString' in obj, 'without proto, null object has toString');
|
|||
t.equal(obj.__proto__, null); // eslint-disable-line no-proto
|
|||
}
|
|||
|
|||
t.end();
|
|||
});
|
