Unit-Testing a filter with Jasmine in AngularJS

I don't know how to unit testing my filters. One of the examples are shown below:

angular.module('testApp')
    .filter('range', ['$log', function ($log) {
    return function (companylist, min, max) {
        max = parseInt(max, 10) || 100;
        var result = [];
        angular.forEach(companylist, function (val) {
            if (val.maxSpread >= min && val.maxSpread <= max) {
                result.push(val);
            }
        });

        return result;
    }
}]);

How you can see the filter iterates an array companylist and if the max value will changed the result returns a new list of company.

The company object is structured as follows:

{
  Id: 1,
  name: 'CompanyName',
  short: 'CN',
  maxSpread: 25
}

I have no idea to test this filter. Looking for a unit test at several tutorials and blogs but I've not found anything what could help me.