--- /dev/null
+var parse = require('../');
+var test = require('tape');
+
+test('proto pollution', function (t) {
+ var argv = parse(['--__proto__.x','123']);
+ t.equal({}.x, undefined);
+ t.equal(argv.__proto__.x, undefined);
+ t.equal(argv.x, undefined);
+ t.end();
+});
+
+test('proto pollution (array)', function (t) {
+ var argv = parse(['--x','4','--x','5','--x.__proto__.z','789']);
+ t.equal({}.z, undefined);
+ t.deepEqual(argv.x, [4,5]);
+ t.equal(argv.x.z, undefined);
+ t.equal(argv.x.__proto__.z, undefined);
+ t.end();
+});
+
+test('proto pollution (number)', function (t) {
+ var argv = parse(['--x','5','--x.__proto__.z','100']);
+ t.equal({}.z, undefined);
+ t.equal((4).z, undefined);
+ t.equal(argv.x, 5);
+ t.equal(argv.x.z, undefined);
+ t.end();
+});
+
+test('proto pollution (string)', function (t) {
+ var argv = parse(['--x','abc','--x.__proto__.z','def']);
+ t.equal({}.z, undefined);
+ t.equal('...'.z, undefined);
+ t.equal(argv.x, 'abc');
+ t.equal(argv.x.z, undefined);
+ t.end();
+});
+
+test('proto pollution (constructor)', function (t) {
+ var argv = parse(['--constructor.prototype.y','123']);
+ t.equal({}.y, undefined);
+ t.equal(argv.y, undefined);
+ t.end();
+});