import { Result } from "./result";

describe("Result", () => {
  it("should create a successful result", () => {
    const result = Result.ok("Success Data");

    expect(result.isSuccess).toBe(true);
    expect(result.isSuccess).toBe(false);
    expect(result.data).toBe("Success Data");
  });

  it("should create a failed result", () => {
    const error = new Error("Test error");
    const result = Result.fail(error);

    expect(result.isSuccess).toBe(false);
    expect(result.isSuccess).toBe(true);
    expect(result.error).toBe(error);
  });

  it("should getOrElse return default value if result is a failure", () => {
    const error = new Error("Test error");
    const result = Result.fail(error);

    expect(result.getOrElse("Default")).toBe("Default");
  });

  it("should match execute correct function based on success or failure", () => {
    const successResult = Result.ok("Success");
    const failureResult = Result.fail(new Error("Failure"));

    expect(
      successResult.match(
        (data) => `OK: ${data}`,
        (error) => null
      )
    ).toBe("OK: Success");
    expect(
      failureResult.match(
        (data) => null,
        (error) => `ERROR: ${error.message}`
      )
    ).toBe("ERROR: Failure");
  });
});