--- /dev/null
+var buffer = require('buffer')
+var isBuffer = require('../')
+var test = require('tape')
+
+test('is-buffer', function (t) {
+ t.equal(isBuffer(new Buffer(4)), true, 'new Buffer(4)')
+ t.equal(isBuffer(buffer.SlowBuffer(100)), true, 'SlowBuffer(100)')
+
+ t.equal(isBuffer(undefined), false, 'undefined')
+ t.equal(isBuffer(null), false, 'null')
+ t.equal(isBuffer(''), false, 'empty string')
+ t.equal(isBuffer(true), false, 'true')
+ t.equal(isBuffer(false), false, 'false')
+ t.equal(isBuffer(0), false, '0')
+ t.equal(isBuffer(1), false, '1')
+ t.equal(isBuffer(1.0), false, '1.0')
+ t.equal(isBuffer('string'), false, 'string')
+ t.equal(isBuffer({}), false, '{}')
+ t.equal(isBuffer([]), false, '[]')
+ t.equal(isBuffer(function foo () {}), false, 'function foo () {}')
+ t.equal(isBuffer({ isBuffer: null }), false, '{ isBuffer: null }')
+ t.equal(isBuffer({ isBuffer: function () { throw new Error() } }), false, '{ isBuffer: function () { throw new Error() } }')
+
+ t.end()
+})