Unit Testing 03. Char lookup

describe("Lookup Char tests", function(){
   it("should return undefined non string first parameter", function(){
      expect(lookupChar(13, 0)).to.equal(undefined);
    }),
    it("should return undefined non string second parameter", function(){
        expect(lookupChar("asdasddd", "asdasd")).to.equal(undefined);
    }),
   it("should return undefined with floating point number second parameter", function(){
        expect(lookupChar("asdasd", 3.23)).to.equal(undefined);
    })

  it("should return incorrect index with incorrect index value", function(){
         expect(lookupChar("asdasd", 13)).to.equal("Incorrect index");
     })
    it("should return incorrect index with negative index value", function(){
         expect(lookupChar("asdasd", -1)).to.equal("Incorrect index");
    })
    it("should return incorrect index with index value equal to string length", function(){
      expect(lookupChar("asdasd", 6)).to.equal("Incorrect index");
    })

    it("should return success", function(){
         expect(lookupChar("asdasd", 0)).to.equal("a");
    })
     it("should return success", function(){
        expect(lookupChar("asdasd", 5)).to.equal("d");
     })
 })