mocha 0.0.2

  • Installing
  • Versions
  • 64


Mocha is a simple caching library for Dart.


  • Size-based eviction
  • Time-based expiration (since last write)
  • Asynchronously refresh values
  • Automatic asynchronous loading of values into the cache
  • Manually...
    • Evict/invalidate values
    • Populate the cache


A simple usage example:

import 'dart:async';
import 'package:mocha/mocha.dart';

Future<String> expensiveOperation(int key) async {
  // pretend this is takes time to calculate
  var sq = key * key;
  return '$key^2 = $sq';

main() async {
  var cache = new LoadingCache<int, String>(
    maximumSize: 10,
    expiresAfterWrite: const Duration(minutes: 1)

  print(await cache.get(4));

Features and bugs

Please file feature requests and bugs at the issue tracker.



  • Improved expiration (no timers)
  • Refresher -> Callable


  • Initial version.

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  mocha: "^0.0.2"

2. Install it

You can install packages from the command line:

with pub:

$ pub get

with Flutter:

$ flutter packages get

Alternatively, your editor might support pub get or flutter packages get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

      import 'package:mocha/mocha.dart';
Version Uploaded Documentation Archive
0.0.2 May 19, 2017 Go to the documentation of mocha 0.0.2 Download mocha 0.0.2 archive
0.0.1 May 19, 2017 Go to the documentation of mocha 0.0.1 Download mocha 0.0.1 archive


We analyzed this package on Jun 19, 2018, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.0.0-dev.63.0
  • pana: 0.11.3


Describes how popular the package is relative to other packages. [more]
40 / 100
Code health derived from static analysis. [more]
87 / 100
Reflects how tidy and up-to-date the package is. [more]
91 / 100
Overall score:
Weighted score of the above. [more]
Learn more about scoring.


Detected platforms: Flutter, web, other

No platform restriction found in primary library package:mocha/mocha.dart.


  • Fix analysis and formatting issues.

    Analysis or formatting checks reported 1 error 4 hints.

    Strong-mode analysis of lib/src/cache_impl.dart failed with the following error:

    line: 152 col: 3
    Invalid override. The type of 'LoadingCacheImpl.getOrPutAll' ('<T extends dynamic>(Iterable<K>, (K) → Future<V>) → Future<Map<K, V>>') isn't a subtype of 'AbstractCache<K, V>.getOrPutAll' ('<T extends K>(Iterable<K>, (K) → Future<V>) → Future<Map<K, V>>').

    Run dartfmt to format lib/src/abstract_cache.dart.

    Similar analysis of the following files failed:

    • lib/src/cache.dart (hint)
  • Package is getting outdated.

    The package was released 56 weeks ago.

  • The description is too short.

    Add more detail about the package, what it does and what is its target use case. Try to write at least 60 characters.

  • Package is pre-v1 release.

    While there is nothing inherently wrong with versions of 0.*.*, it usually means that the author is still experimenting with the general direction API.

  • Maintain an example.

    None of the files in your example/ directory matches a known example patterns. Common file name patterns include: main.dart, example.dart or you could also use mocha.dart.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=1.20.1 <2.0.0
Dev dependencies
test ^0.12.0