mockito

A mock framework inspired by Mockito with APIs for Fakes, Mocks, behavior verification, and stubbing.

$dart pub add mockito

Official docs outline

Extra Credit builds an outline of mockito's docs the first time your work uses it. Until then, start at the official documentation.

path A string-based path manipulation library. All of the path operations you know and love, with solid support for Windows, POSIX (Linux and Mac
collection Collections and utilities functions and classes related to collections.
intl Contains code to deal with internationalized/localized messages, date and number formatting and parsing, bi-directional text, and other inte
json_serializable Automatically generate code for converting to and from JSON by annotating Dart classes.
dio A powerful HTTP networking package, supports Interceptors, Aborting and canceling a request, Custom adapters, Transformers, etc.
json_annotation Classes and helper functions that support JSON code generation via the `json_serializable` package.
path_provider Flutter plugin for getting commonly used locations on host platform file systems, such as the temp and app data directories.
args Library for defining parsers for parsing raw command-line arguments into a set of options and values using GNU and POSIX style options.
shared_preferences Flutter plugin for reading and writing simple key-value pairs. Wraps NSUserDefaults on iOS and SharedPreferences on Android.
crypto Implementations of SHA, MD5, and HMAC cryptographic functions.
logging Provides APIs for debugging and error logging, similar to loggers in other languages, such as the Closure JS Logger and java.util.logging.Lo
uuid RFC4122 (v1, v4, v5, v6, v7, v8) UUID Generator and Parser for Dart