describe("macrotest", function () {
  this.before(function () {
    this.x = 10;
    // will run before each function
  });

  this.it("should set x to 10", function () {
    assert.equal(this.x, 10);
  });

  this.describe("nested describes", function () {
    this.it("should should chain down into lower describe blocks", function () {
      assert.ok(false);
    });
  });
});