@crossed/ui/lib/module/forms/Calendar/__tests__/utils.spec.js

A universal & performant styling library for React Native, Next.js & React

import {
  capFirstLetter,
  getLocalMonthNames,
  generateYearRange
} from "../utils";
describe("capFirstLetter", () => {
  test("should capitalize the first letter of a string", () => {
    expect(capFirstLetter("hello")).toBe("Hello");
  });
  test("should return an empty string if input is empty", () => {
    expect(capFirstLetter("")).toBe("");
  });
});
describe("getLocalMonthNames", () => {
  test("should return an array of month names in the correct locale", () => {
    const months = getLocalMonthNames("en-US");
    expect(months).toHaveLength(12);
    expect(months[0]).toBe("January");
  });
  test("should capitalize the first letter of each month", () => {
    const months = getLocalMonthNames("fr-FR");
    expect(
      months.every((month) => month.charAt(0) === month.charAt(0).toUpperCase())
    ).toBe(true);
  });
});
describe("generateYearRange", () => {
  test("should return a range of years from min to max", () => {
    expect(generateYearRange(2e3, 2005)).toEqual([
      2e3,
      2001,
      2002,
      2003,
      2004,
      2005
    ]);
  });
  test("should return a single year if minYear and maxYear are the same", () => {
    expect(generateYearRange(2023, 2023)).toEqual([2023]);
  });
  test("should throw an error if minYear is greater than maxYear", () => {
    expect(() => generateYearRange(2025, 2020)).toThrow(
      "L'ann\xE9e minimale doit \xEAtre inf\xE9rieure ou \xE9gale \xE0 l'ann\xE9e maximale."
    );
  });
});
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