Edit in Plunker
<script>
  function Ctrl($scope) {
    $scope.numbers = [1,2,3,4,5,6,7,8,9];
    $scope.letters = "abcdefghi";
    $scope.numLimit = 3;
    $scope.letterLimit = 3;
  }
</script>
<div ng-controller="Ctrl">
  Limit {{numbers}} to: <input type="integer" ng-model="numLimit">
  <p>Output numbers: {{ numbers | limitTo:numLimit }}</p>
  Limit {{letters}} to: <input type="integer" ng-model="letterLimit">
  <p>Output letters: {{ letters | limitTo:letterLimit }}</p>
</div>
var numLimitInput = element(by.model('numLimit'));
var letterLimitInput = element(by.model('letterLimit'));
var limitedNumbers = element(by.binding('numbers | limitTo:numLimit'));
var limitedLetters = element(by.binding('letters | limitTo:letterLimit'));

it('should limit the number array to first three items', function() {
  expect(numLimitInput.getAttribute('value')).toBe('3');
  expect(letterLimitInput.getAttribute('value')).toBe('3');
  expect(limitedNumbers.getText()).toEqual('Output numbers: [1,2,3]');
  expect(limitedLetters.getText()).toEqual('Output letters: abc');
});

it('should update the output when -3 is entered', function() {
  numLimitInput.clear();
  numLimitInput.sendKeys('-3');
  letterLimitInput.clear();
  letterLimitInput.sendKeys('-3');
  expect(limitedNumbers.getText()).toEqual('Output numbers: [7,8,9]');
  expect(limitedLetters.getText()).toEqual('Output letters: ghi');
});

it('should not exceed the maximum size of input array', function() {
  numLimitInput.clear();
  numLimitInput.sendKeys('100');
  letterLimitInput.clear();
  letterLimitInput.sendKeys('100');
  expect(limitedNumbers.getText()).toEqual('Output numbers: [1,2,3,4,5,6,7,8,9]');
  expect(limitedLetters.getText()).toEqual('Output letters: abcdefghi');
});
uld search in specific fields when filtering with a predicate object', function() { var searchAny = element(by.model('search.$')); searchAny.clear(); searchAny.sendKeys('i'); expectFriendNames(['Mary', 'Mike', 'Julie', 'Juliette'], 'friendObj'); }); it('should use a equal comparison when comparator is true', function() { var searchName = element(by.model('search.name')); var strict = element(by.model('strict')); searchName.clear(); searchName.sendKeys('Julie'); strict.click(); expectFriendNames(['Julie'], 'friendObj'); });