test filter scenario

Question

I would like to know the best way to test (with Jasmine) a filter with this scenario:

function districtFilter(city, array) {
    var districtFound = array.filter(function(a) {
        return a.id !== city.id;
    });
    return districtFound;
}

Answer 1

var array = [
{
  id: 1,
  city: "Washington"
},
{
  id: 2,
  city: "Chicago"
},
{
  id: 3,
  city: "New York"
}];

var city = {
  id: 1,
  city: "Washington"
};

console.log(districtFilter(city, array));