Add first rough rust-di content

content/posts/rust-di-mocking.md

@@ -7,18 +7,17 @@ tags = ["rust", "testing"]
 +++
 
 {{< lead >}}
-Rust is hard.
+Rust is hard. Especially when trying to enforce object orientation as found in e.g. Java.
 {{< /lead >}}
 
-That's one of my takeways from a recent endeavor during the winter break.
+That is one of my takeways as a relatively new Rust developer from a recent endeavor during the winter break. With finally enough time to work on one of my currently most-used projects **picoKontroller** --- a multi-use MIDI controller software --- I dared to tackle one of this project's biggest shortcomings: Testing.
 
 {{< forgejo repo="ghoscht/picoKontroller" >}}
 
-## TL;DR
-Rust isn't necessarily suited for pure object oriented programming.
+Since the core functionality of this project depends on the presence of a MIDI device, as well as PulseAudio/Pipewire, I wanted to attempt to mock these subsystems in order to increase overall testability. In this context I decided to apply dependency injection with the goal to transform this system into a thoroughly testable and well structured project.
 
 ## Getting Started
-Use [Shaku](https://github.com/AzureMarker/shaku) and [Mockall](https://github.com/asomers/mockall)
+After some research on the most well known dependency injection and mockinng libraries for Rust I decided on [Shaku](https://github.com/AzureMarker/shaku) and [Mockall](https://github.com/asomers/mockall), being each the most renowned project in their respective category.
 
 {{< highlight rust "linenos=table" >}}
 #[derive(Parser)]
@@ -30,3 +29,14 @@ struct Cli {
     list_mpris: bool,
 }
 {{< / highlight >}}
+
+This was inspired by a [Japanese post on Qiita](https://qiita.com/no_job_swan/items/703f1f08f6a998aea183) by user _no\_job\_swan_, introducing [tauri](https://github.com/tauri-apps/tauri) --- an alternative to electron --- to developers coming from the JavaScript world who don't know Rust.
+
+## First Approach
+
+tried to use traits as polymorphy -> upcast not possible
+
+don't use boxed traits [blog](https://bennett.dev/dont-use-boxed-trait-objects-for-struct-internals/)
+-> generics
+
+Shaku supports [generics](https://github.com/AzureMarker/shaku/blob/62ccac4f3704365bae71791ee43de6c5714078d4/shaku/tests/generic_modules.rs)