add unit tests

engine/shader_backend.odin

@@ -4,43 +4,46 @@ import "core:fmt"
 import "core:os"
 import sdl "vendor:sdl3"
 
-choose_shader_runtime :: proc(device: ^sdl.GPUDevice) -> (Shader_Runtime, bool) {
-	supported := sdl.GetGPUShaderFormats(device)
-
+choose_shader_runtime_from_formats :: proc(
+	supported: sdl.GPUShaderFormat,
+) -> (
+	Shader_Runtime,
+	bool,
+) {
 	if .MSL in supported {
 		return {
-				backend = .Metal_MSL,
-				format = {.MSL},
-				shader_dir = "shaders/metal",
-				entrypoint = "main",
-			},
-			true
-
+			backend = .Metal_MSL,
+			format = {.MSL},
+			shader_dir = "shaders/metal",
+			entrypoint = "main",
+		}, true
 	}
 	if .DXIL in supported {
 		return {
-				backend = .DSD12_DXIL,
-				format = {.DXIL},
-				shader_dir = "shaders/d3d12",
-				entrypoint = "main",
-			},
-			true
-
+			backend = .DSD12_DXIL,
+			format = {.DXIL},
+			shader_dir = "shaders/d3d12",
+			entrypoint = "main",
+		}, true
 	}
 	if .SPIRV in supported {
 		return {
-				backend = .Vulkan_SPIRV,
-				format = {.SPIRV},
-				shader_dir = "shaders/vulkan",
-				entrypoint = "main",
-			},
-			true
+			backend = .Vulkan_SPIRV,
+			format = {.SPIRV},
+			shader_dir = "shaders/vulkan",
+			entrypoint = "main",
+		}, true
 	}
 
-	fmt.eprintfln("No supported shader format from device {got %v}", supported)
+	fmt.eprintfln("No supported shader format from device (got %v)", supported)
 	return {}, false
 }
 
+choose_shader_runtime :: proc(device: ^sdl.GPUDevice) -> (Shader_Runtime, bool) {
+	supported := sdl.GetGPUShaderFormats(device)
+	return choose_shader_runtime_from_formats(supported)
+}
+
 load_shader_blob :: proc(path: string) -> ([]u8, bool) {
 	data, err := os.read_entire_file(path, context.allocator)
 	if err != nil {