text: describe("join", function() {
    it("returns the empty string when passed the empty sequence", function() {
      expect(Lazy([]).join()).toEqual("");
    });
  
    it("returns the only element as a string when passed a one-element sequence", function() {
      expect(Lazy([1]).join()).toEqual("1");
    });
  
    it("uses comma as delimiter when no delimiter is given", function() {
      expect(Lazy(["a", "b", "c"]).join()).toEqual("a,b,c");
    });
  
    it("uses given delimiter instead of comma", function() {
      expect(Lazy(["a", "b", "c"]).join(":")).toEqual("a:b:c");
    });
  
    it("uses delimiter for ObjectLikeSequences, not only for ArrayLikeSequences", function() {
      expect(Lazy({ a: "aaron", b: "brad" }).values().join(':')).toEqual("aaron:brad");
    });
  });
  