solid

A walk-through of improving an example "Message Store" to demonstrate SOLID principles.

Tutorial

There is documentation to read in the code if you want to go at your own pace. Otherwise you can follow the tutorial in the associated gitbook here ⚠️ (Work in Progress)

Getting started

After cloning the repo, you can run the final example using make run.

Example:

git clone [email protected]:diversemix/solid.git
cd solid/message-store
make run

Exercises

Some thoughts on exercises - to be talked about with the team.

1. Use the class CompositeStoreWriter defined in the file composite-store-writer.ts to replace the use of the decorator pattern to use the composite pattern.
2. Create an implementation of ICacheLogger and use it to replace the cache's use of IStoreLogger.
3. Reading from a non-existant file in the FileStore class can throw an error, come up with a solution that will log this within the current architecture.
4. Create an implementation of IStore that saves the messages into a sqlite in memory db.
5. Implement the Factory Pattern to switch on which implementation of IStore to use.
6. Create tests for the implementations of IStore.