@serenity-is/corelib/src/ui/formatters/dateformatter.spec.ts

Serenity Core Library

import { DateFormatter } from "./dateformatter";

describe("DateFormatter", () => {
    it("shows empty string if value is null", () => {
        var formatter = new DateFormatter();
        expect(formatter.format({ value: null, escape: (s) => s })).toBe("");
    });

    it("shows formatted date if value type is Date", () => {
        var formatter = new DateFormatter();
        var date = new Date(2023, 0, 1); // 01-01-2023
        expect(formatter.format({ value: date, escape: (s) => s })).toBe("01/01/2023");
    });

    it("shows formatted date if value type string and it is a date", () => {
        var formatter = new DateFormatter();
        expect(formatter.format({ value: "2023-01-01T00:00:00.000", escape: (s) => s })).toBe("01/01/2023");
    });

    it("shows given value if value type is string and it is not a date", () => {
        var formatter = new DateFormatter();
        expect(formatter.format({ value: "this is not a date", escape: (s) => s })).toBe("this is not a date");
    });

    it("shows given value if value type is string and it is empty", () => {
        var formatter = new DateFormatter();
        expect(formatter.format({ value: "", escape: (s) => s })).toBe("");
    });

    it("uses given display format", () => {
        var formatter = new DateFormatter();
        formatter.displayFormat = "dd-MM-yyyy";
        expect(formatter.format({ value: "2023-01-01T00:00:00.000", escape: (s) => s })).toBe("01-01-2023");
    });
})