text: var Pangram = require('./pangram');
  
  describe('Pangram()', function()  {
  
    it('empty sentence', function() {
      var pangram = new Pangram('');
      expect(pangram.isPangram()).toBe(false);
    });
  
    it('pangram with only lower case', function()  {
      var pangram = new Pangram("the quick brown fox jumps over the lazy dog");
      expect(pangram.isPangram()).toBe(true);
    });
  
    it("missing character 'x'", function()  {
      var pangram = new Pangram("a quick movement of the enemy will jeopardize five gunboats");
      expect(pangram.isPangram()).toBe(false);
    });
  
    it("another missing character 'x'", function() {
      var pangram = new Pangram("the quick brown fish jumps over the lazy dog");
      expect(pangram.isPangram()).toBe(false);
    });
  
    it("pangram with underscores", function() {
      var pangram = new Pangram("the_quick_brown_fox_jumps_over_the_lazy_dog");
      expect(pangram.isPangram()).toBe(true);
    });
  
    it("pangram with numbers", function() {
      var pangram = new Pangram("the 1 quick brown fox jumps over the 2 lazy dogs");
      expect(pangram.isPangram()).toBe(true);
    });
  
    it('missing letters replaced by numbers', function() {
      var pangram = new Pangram("7h3 qu1ck brown fox jumps ov3r 7h3 lazy dog");
      expect(pangram.isPangram()).toBe(false);
    });
  
    it('pangram with mixed case and punctuation', function()  {
      var pangram = new Pangram("\"Five quacking Zephyrs jolt my wax bed.\"");
      expect(pangram.isPangram()).toBe(true);
    });
  
    it('pangram with non-ascii characters', function()  {
      var pangram = new Pangram("Victor jagt zwölf Boxkämpfer quer über den großen Sylter Deich.");
      expect(pangram.isPangram()).toBe(true);
    });
  });