text: var toRna = require('./rna-transcription');
  
  describe("toRna()", function() {
    it("transcribes cytidine to guanosine", function() {
      expect(toRna('C')).toEqual('G');
    });
  
    it("transcribes guanosine to cytidine", function() {
      expect(toRna('G')).toEqual('C');
    });
  
    it("transcribes adenosine to uracil", function() {
      expect(toRna('A')).toEqual('U');
    });
  
    it("transcribes thymidine to adenosine", function() {
      expect(toRna('T')).toEqual('A');
    });
  
    it("transcribes all dna nucleotides to their rna complements", function() {
      expect(toRna('ACGTGGTCTTAA'))
          .toEqual('UGCACCAGAAUU');
    });
  });
  