import { sorter } from "./comparer";
import assert from "assert";

describe("comparer", function () {
   describe("sorter", function () {
      it("orders by numeric values ASC", function () {
         let records = [
            { value: 3, id: 1 },
            { value: -1, id: 2 },
            { value: 2, id: 3 },
            { value: null, id: 4 },
            { value: null, id: 5 },
         ];

         let sort = sorter([{ value: { bind: "value" }, direction: "ASC" }]);

         let sorted = sort(records);

         assert.equal(sorted[0].value, -1);
         assert.equal(sorted[1].value, 2);
         assert.equal(sorted[2].value, 3);
         assert.equal(sorted[3].value, null);
         assert.equal(sorted[4].value, null);
      });

      it("orders by numeric values DESC", function () {
         let records = [
            { value: 3, id: 1 },
            { value: 1, id: 2 },
            { value: -2, id: 3 },
            { value: null, id: 4 },
            { value: null, id: 5 },
         ];

         let sort = sorter([{ value: { bind: "value" }, direction: "DESC" }]);

         let sorted = sort(records);

         assert.equal(sorted[0].value, 3);
         assert.equal(sorted[1].value, 1);
         assert.equal(sorted[2].value, -2);
         assert.equal(sorted[3].value, null);
         assert.equal(sorted[4].value, null);
      });

      it("supports field", function () {
         let records = [
            { value: 3, id: 1 },
            { value: 1, id: 2 },
            { value: 2, id: 3 },
         ];

         let sort = sorter([{ field: "value", direction: "ASC" }]);
         let sorted = sort(records);
         assert.equal(sorted[0].value, 1);
         assert.equal(sorted[1].value, 2);
         assert.equal(sorted[2].value, 3);
      });
   });
});