must/test/must/instance_of_test.js

Testing and assertion library with friendly BDD syntax — awesome.must.be.true(). Many expressive matchers and is test runner and framework agnostic. Follows RFC 2119 with its use of MUST. Good and well tested stuff.

var Must = require("../..")
var assert = require("./assert")

describe("Must.prototype.instanceOf", function() {
  it("must be an alias of Must.prototype.instanceof", function() {
    assert.strictEqual(Must.prototype.instanceOf, Must.prototype.instanceof)
  })
})