aidd-javascript-io-effects

Isolates network I/O and side effects using the saga pattern with call and put, enabling deterministic testing without mocking.

Why

Sagas yield plain effect descriptions instead of executing side effects directly. This makes async workflows deterministic and testable — drive a saga with iterator.next(value) and assert on each yielded effect without running real I/O.

Usage

Use call(fn, ...args) to describe a side effect and put(action) to describe a Redux dispatch:

function* signInUser() {
  const user = yield call(fetchUser, "42");
  yield put(userLoaded(user));
}

Test by driving the generator manually and asserting on yielded values.

When to use

• Making network requests or invoking side effects
• Implementing Redux sagas
• Testing async workflows without mocking