extern crate mtl;
extern crate libc;

use mtl::{Device};

#[test]
fn get_device() {
    let device = Device::system_default_device();
    assert!(device.is_ok());
}

#[test]
fn get_device_name() {
    let device = Device::system_default_device().unwrap();
    assert!(!device.name().into_owned().is_empty());
}

extern crate mtl;
extern crate libc;

use mtl::sys::{MTLCopyAllDevices,MTLOrigin, MTLOriginMake, MTLClearColorMake};

#[test]
fn it_works() {
    let _origin = MTLOriginMake(50, 21, 11);
    let _color = MTLClearColorMake(50.0, 21.0, 11.0, 100.0);
    let _hi = unsafe { MTLCopyAllDevices() };
}

--- 
+++ 
@@ -1,16 +1,11 @@
 extern crate mtl;
 extern crate libc;
 
-use mtl::{Device};
+use mtl::sys::{MTLCopyAllDevices,MTLOrigin, MTLOriginMake, MTLClearColorMake};
 
 #[test]
-fn get_device() {
-    let device = Device::system_default_device();
-    assert!(device.is_ok());
+fn it_works() {
+    let _origin = MTLOriginMake(50, 21, 11);
+    let _color = MTLClearColorMake(50.0, 21.0, 11.0, 100.0);
+    let _hi = unsafe { MTLCopyAllDevices() };
 }
-
-#[test]
-fn get_device_name() {
-    let device = Device::system_default_device().unwrap();
-    assert!(!device.name().into_owned().is_empty());
-}
Add some proper high level tests
