Introduce a unit test framework.

.github/workflows/cmake.yml

@@ -0,0 +1,41 @@
+name: CMake
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+env:
+  BUILD_TYPE: Release
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Install dependencies
+      run: |
+        sudo apt install software-properties-common
+        sudo add-apt-repository ppa:ubuntu-toolchain-r/test
+        sudo apt-get update
+        sudo apt install cmake gcc-13 g++-13
+
+        sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-13 60
+        sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-13 60
+        sudo update-alternatives --config gcc
+        sudo update-alternatives --config g++
+
+    - name: Linting
+      run: find -name "*.cc" -o  -name "*.c" -o  -name "*.hh" -o  -name "*.h" | xargs clang-format -n 
+
+    - name: Build 
+      run: |
+        cmake -B build -S ./ && cmake --build build
+
+    - name: Run st7735_driver_test 
+      run: |
+        ./build/tests/st7735_driver_test
+

CMakeLists.txt

@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.13)
+
+project(display_drivers LANGUAGES C CXX)
+
+# Set the C++ standard to C++20
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+# For lsp
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+
+set(NAME st7735_driver)
+
+add_subdirectory(src)
+add_subdirectory(tests)

README.md

@@ -41,8 +41,8 @@ void main(void){
 
     lcd_st7735_init(&ctx, &interface);
     lcd_st7735_startup(&ctx);
-    lcd_st7735_fill_rectangle(&ctx, (LCD_rectangle){.origin = {.x = 0, .y = 0},
-        .end = {.x = 160, .y = 128}}, 0x00FF00);
+    lcd_st7735_fill_rectangle(
+       &ctx_, (LCD_rectangle){.origin = {.x = 0, .y = 0}, .width = 160, .height = 128}, 0x00FF00);
 }
 ```
 
@@ -86,3 +86,18 @@ void main(void){
 }
 ```
 
+## Running unittests
+Start nix development environment
+```sh
+nix develop
+```
+Build using Cmake
+```sh
+cmake -S . -B ./build/. && cmake --build ./build/.
+```
+Run the test
+```sh
+./build/tests/st7735_driver_test
+```
+
+

flake.nix

@@ -0,0 +1,28 @@
+{
+    description = "C/C++ environment";
+
+    inputs = {
+         nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.11";
+         flake-utils.url = "github:numtide/flake-utils";
+    };
+
+outputs = { self, nixpkgs, flake-utils, ... }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            cmake
+            clang-tools_18
+            gdb
+            python310
+          ];
+          shellHook = ''
+            echo "C++ dev environment ready!"
+          '';
+        };
+      }
+    );
+}