src/utils/boolean.test.ts

import { describe, expect, it } from "vitest";

import { parseBooleanValue } from "./boolean.js";

describe("parseBooleanValue", () => {
  it("handles boolean inputs", () => {
    expect(parseBooleanValue(true)).toBe(true);
    expect(parseBooleanValue(false)).toBe(false);
  });

  it("parses default truthy/falsy strings", () => {
    expect(parseBooleanValue("true")).toBe(true);
    expect(parseBooleanValue("1")).toBe(true);
    expect(parseBooleanValue("yes")).toBe(true);
    expect(parseBooleanValue("on")).toBe(true);
    expect(parseBooleanValue("false")).toBe(false);
    expect(parseBooleanValue("0")).toBe(false);
    expect(parseBooleanValue("no")).toBe(false);
    expect(parseBooleanValue("off")).toBe(false);
  });

  it("respects custom truthy/falsy lists", () => {
    expect(
      parseBooleanValue("on", {
        truthy: ["true"],
        falsy: ["false"],
      }),
    ).toBeUndefined();
    expect(
      parseBooleanValue("yes", {
        truthy: ["yes"],
        falsy: ["no"],
      }),
    ).toBe(true);
  });

  it("returns undefined for unsupported values", () => {
    expect(parseBooleanValue("")).toBeUndefined();
    expect(parseBooleanValue("maybe")).toBeUndefined();
    expect(parseBooleanValue(1)).toBeUndefined();
  });
});