Thruster Jab

Because this is a dependency injection library, and shots are injected, and shots are called jabs in the UK.

What is this?

Thruster Jab is a dependency injection library for your service injection needs. It works using dynamic dispatch via Box<dyn Any>. If you're looking to make something that will need mocks in order to test (say, an API that makes external calls, or a service that is very expensive) then Jab might be helpful to you.

Example

Although built for thruster, Jab can be used independently. A simple example would be:

```rs struct A(i32);

trait C {}

impl C for A {}

let mut jab = JabDI::default();

let a = A(0);

provide!(jab, dyn C, a); let something = fetch!(jab, dyn C); // This is the original a that we passed in, now as a C trait. ```

A slightly longer, but more "copy pasta" example (taken from our tests because I'm lazy) would be:

```rs // Just making two structs that impl two traits

[derive(Debug, PartialEq)]

struct A(i32);

[derive(Debug, PartialEq)]

struct B(i32);

trait C { fn valc(&self) -> i32; } trait D { fn vald(&self) -> i32; }

impl C for A { fn valc(&self) -> i32 { self.0 } }

impl D for B { fn vald(&self) -> i32 { self.0 } }

// This is the good part let mut jab = JabDI::default();

let a = A(0); let b = B(1);

provide!(jab, dyn C, a); provide!(jab, dyn D, b);

assert_eq!( 0, fetch!(jab, dyn C).valc(), "it should correctly find struct A for trait C" );

assert_eq!( 1, fetch!(jab, dyn D).vald(), "it should correctly find struct B for trait D" ); ```

For use with actual tests, check out our hello_world.rs example.