text: "use strict";
  /** @test {pairwise} */
  describe('Observable.prototype.pairwise', function () {
      asDiagram('pairwise')('should group consecutive emissions as arrays of two', function () {
          var e1 = hot('--a--b-c----d--e---|');
          var expected = '-----u-v----w--x---|';
          var values = {
              u: ['a', 'b'],
              v: ['b', 'c'],
              w: ['c', 'd'],
              x: ['d', 'e']
          };
          var source = e1.pairwise();
          expectObservable(source).toBe(expected, values);
      });
      it('should pairwise things', function () {
          var e1 = hot('--a--^--b--c--d--e--f--g--|');
          var e1subs = '^                    !';
          var expected = '------v--w--x--y--z--|';
          var values = {
              v: ['b', 'c'],
              w: ['c', 'd'],
              x: ['d', 'e'],
              y: ['e', 'f'],
              z: ['f', 'g']
          };
          var source = e1.pairwise();
          expectObservable(source).toBe(expected, values);
          expectSubscriptions(e1.subscriptions).toBe(e1subs);
      });
      it('should not emit on single-element streams', function () {
          var e1 = hot('-----^--b----|');
          var e1subs = '^       !';
          var expected = '--------|';
          var values = {};
          var source = e1.pairwise();
          expectObservable(source).toBe(expected, values);
          expectSubscriptions(e1.subscriptions).toBe(e1subs);
      });
      it('should handle mid-stream throw', function () {
          var e1 = hot('--a--^--b--c--d--e--#');
          var e1subs = '^              !';
          var expected = '------v--w--x--#';
          var values = {
              v: ['b', 'c'],
              w: ['c', 'd'],
              x: ['d', 'e']
          };
          var source = e1.pairwise();
          expectObservable(source).toBe(expected, values);
          expectSubscriptions(e1.subscriptions).toBe(e1subs);
      });
      it('should handle empty', function () {
          var e1 = cold('|');
          var e1subs = '(^!)';
          var expected = '|';
          var source = e1.pairwise();
          expectObservable(source).toBe(expected);
          expectSubscriptions(e1.subscriptions).toBe(e1subs);
      });
      it('should handle never', function () {
          var e1 = cold('-');
          var e1subs = '^';
          var expected = '-';
          var source = e1.pairwise();
          expectObservable(source).toBe(expected);
          expectSubscriptions(e1.subscriptions).toBe(e1subs);
      });
      it('should handle throw', function () {
          var e1 = cold('#');
          var e1subs = '(^!)';
          var expected = '#';
          var source = e1.pairwise();
          expectObservable(source).toBe(expected);
          expectSubscriptions(e1.subscriptions).toBe(e1subs);
      });
  });
  //# sourceMappingURL=pairwise-spec.js.map