6 - Asynchronous Programming

Asynchronous

callbacks are used in general

Future class

represents a potential value or error that will be available at some time in the future

Async Await

provides a more linear and readable way to write asynchronous code, reducing the need for nested callbacks or .then() chains

Reading data from a file asynchronously

consider these use cases (1)

Receiving data from the network

consider these use cases (2)

Listening to events from a sensor

consider these use cases (3)

Handling a continuous flow of data

consider these use cases (4)

Stream

continuous

Synchronous

blocking operations while in progress, the program is unresponsive

Asynchronous

non-blocking

Asynchronous

use callbacks, futures, Streams to NOTIFY the programs when they’re finished

Ensures App Quality

importance, correctness and usability leads to better UX

Reduces Bugs

importance, errors

Maintainability

importance, incremental

Unit Testing

types (1)

Widget Testing

types (2)

Integration testing

types (3)

Small, Fast, Isolated

pros of unit (1)

Easy to Write

pros of unit (2)

Early Detection

pros of unit (3)

Limited Scope

cons of unit (1)

Need to Setup

cons of unit (2)

Refactoring

cons of unit (3)

Test UI

pros of widget (1)

Simulate User Interaction

pros of widget (2)

More Comprehensive

pros of widget (3)

Limited Scope

cons of widget (1)

Harder to Write than Unit

cons of widget (2)

Tests the Whole App

pros of integration (1)

Simulates Real World Issues

pros of integration (2)

Highest Confidence

pros of integration (3)

Slowest

cons of integration (1)

Harder to Write

cons of integration (2)

Harder to Debug

cons of integration (3)