import { getErrorMessage } from "../error";

describe("getErrorMessage", () => {
  it("extracts the message off an Error instance", () => {
    expect(getErrorMessage(new Error("boom"))).toBe("boom");
  });

  it("falls back to the provided fallback for non-Error values", () => {
    expect(getErrorMessage("nope", "default")).toBe("default");
    expect(getErrorMessage(undefined, "default")).toBe("default");
    expect(getErrorMessage({ thing: 1 }, "default")).toBe("default");
    expect(getErrorMessage(123, "default")).toBe("default");
  });

  it("uses the default fallback when none is supplied", () => {
    expect(getErrorMessage(123)).toBe("An unexpected error occurred");
  });
});