Function stringify

test/effected.spec.ts:2749–2767

(value: unknown)

  // This helper function extracts the result of `stringify` by triggering an `UnhandledEffectError`
  // and extracting the formatted payload from the error message
  function stringify(value: unknown): string {
    // Create an effect with our test value as its payload
    const testStringify = effect("testStringify")<[value: unknown], void>;

    try {
      // Running this will throw an `UnhandledEffectError` with our value stringified in the message
      effected(function* () {
        yield* testStringify(value);
      }).runSyncUnsafe();
      throw new Error("Expected UnhandledEffectError to be thrown");
    } catch (error) {
      if (!(error instanceof UnhandledEffectError)) {
        throw error;
      }

      // Extract just the stringified part from: "Unhandled effect: testStringify(<stringified value>)"
      return error.message.replace("Unhandled effect: testStringify(", "").slice(0, -1);
    }
  }

  it("should handle primitive values correctly", () => {
    expect(stringify(42)).toBe("42");