text: /* */ 
  "format global";
  
  describe('Compare Arrays', function() {
      it('Should recognize when two arrays have the same contents', function () {
          var subject = ["A", {}, function () { } ];
          var compareResult = ko.utils.compareArrays(subject, subject.slice(0));
  
          expect(compareResult.length).toEqual(subject.length);
          for (var i = 0; i < subject.length; i++) {
              expect(compareResult[i].status).toEqual("retained");
              expect(compareResult[i].value).toEqual(subject[i]);
          }
      });
  
      it('Should recognize added items', function () {
          var oldArray = ["A", "B"];
          var newArray = ["A", "A2", "A3", "B", "B2"];
          var compareResult = ko.utils.compareArrays(oldArray, newArray);
          expect(compareResult).toEqual([
              { status: "retained", value: "A" },
              { status: "added", value: "A2", index: 1 },
              { status: "added", value: "A3", index: 2 },
              { status: "retained", value: "B" },
              { status: "added", value: "B2", index: 4 }
          ]);
      });
  
      it('Should recognize deleted items', function () {
          var oldArray = ["A", "B", "C", "D", "E"];
          var newArray = ["B", "C", "E"];
          var compareResult = ko.utils.compareArrays(oldArray, newArray);
          expect(compareResult).toEqual([
              { status: "deleted", value: "A", index: 0 },
              { status: "retained", value: "B" },
              { status: "retained", value: "C" },
              { status: "deleted", value: "D", index: 3 },
              { status: "retained", value: "E" }
          ]);
      });
  
      it('Should recognize mixed edits', function () {
          var oldArray = ["A", "B", "C", "D", "E"];
          var newArray = [123, "A", "E", "C", "D"];
          var compareResult = ko.utils.compareArrays(oldArray, newArray);
          expect(compareResult).toEqual([
              { status: "added", value: 123, index: 0 },
              { status: "retained", value: "A" },
              { status: "deleted", value: "B", index: 1 },
              { status: "added", value: "E", index: 2, moved: 4 },
              { status: "retained", value: "C" },
              { status: "retained", value: "D" },
              { status: "deleted", value: "E", index: 4, moved: 2 }
          ]);
      });
  
      it('Should recognize replaced array', function () {
          var oldArray = ["A", "B", "C", "D", "E"];
          var newArray = ["F", "G", "H", "I", "J"];
          var compareResult = ko.utils.compareArrays(oldArray, newArray);
          // The ordering of added/deleted items for replaced entries isn't defined, so
          // we'll sort the results first to ensure the results are in a known order for verification.
          compareResult.sort(function(a, b) { return (a.index - b.index) || a.status.localeCompare(b.status); });
          expect(compareResult).toEqual([
              { status : 'added', value : 'F', index : 0 },
              { status : 'deleted', value : 'A', index : 0 },
              { status : 'added', value : 'G', index : 1 },
              { status : 'deleted', value : 'B', index : 1 },
              { status : 'added', value : 'H', index : 2 },
              { status : 'deleted', value : 'C', index : 2 },
              { status : 'added', value : 'I', index : 3 },
              { status : 'deleted', value : 'D', index : 3 },
              { status : 'added', value : 'J', index : 4 },
              { status : 'deleted', value : 'E', index : 4 }
          ]);
      });
  
      it('Should support sparse diffs', function() {
          // A sparse diff is exactly like a regular diff, except it doesn't contain any
          // 'retained' items. This still preserves enough information for most things
          // you'd want to do with the changeset.
  
          var oldArray = ["A", "B", "C", "D", "E"];
          var newArray = [123, "A", "E", "C", "D"];
          var compareResult = ko.utils.compareArrays(oldArray, newArray, { sparse: true });
          expect(compareResult).toEqual([
              { status: "added", value: 123, index: 0 },
              { status: "deleted", value: "B", index: 1 },
              { status: "added", value: "E", index: 2, moved: 4 },
              { status: "deleted", value: "E", index: 4, moved: 2 }
          ]);
      });
  });
  