How to unit test a filter in AngularJS 1.x

Question

How do you unit test a filter in Angular?

Answer 1

Filter can be injected right into test (have found a snippet here)

  describe('myApp', function () {

    beforeEach(function () {
      module('myApp');
    });

    it('has a bool filter', inject(function($filter) {
      expect($filter('bool')).not.toBeNull();
    }));

    it("should return true empty array ", inject(function (boolFilter) {
      expect(boolFilter(true)).toBeTruthy();
    }));

  });

In this example filter name is 'bool', in order to inject this filter you shall use 'bool' + 'Filter' = 'boolFilter'