test/tensor: add specific test for new sync/access API [SKIP_CHANGELOG]

REFERENCE: autumnai#37

src/device.rs

@@ -64,7 +64,7 @@ pub enum DeviceType {
     Cuda(CudaContext),
 }
 
-#[derive(Debug, Copy, Clone)]
+#[derive(Debug, Copy, Clone, PartialEq, Eq)]
 /// Defines a generic set of Memory Errors.
 pub enum Error {
     /// Failures related to the Native framework implementation.

src/frameworks/cuda/api/driver/error.rs

@@ -2,7 +2,7 @@
 
 use std::{fmt, error};
 
-#[derive(Debug, Copy, Clone)]
+#[derive(Debug, Copy, Clone, PartialEq, Eq)]
 /// Defines OpenCL errors.
 pub enum Error {
     /// Failure with provided value.

src/frameworks/native/error.rs

@@ -2,7 +2,7 @@
 
 use std::{fmt, error};
 
-#[derive(Debug, Copy, Clone)]
+#[derive(Debug, Copy, Clone, PartialEq, Eq)]
 /// Defines the Native Error.
 pub enum Error {
     /// Failure related to allocation, syncing memory

src/frameworks/opencl/api/error.rs

@@ -2,7 +2,7 @@
 
 use std::{fmt, error};
 
-#[derive(Debug, Copy, Clone)]
+#[derive(Debug, Copy, Clone, PartialEq, Eq)]
 /// Defines OpenCL errors.
 pub enum Error {
     /// Failure with provided platform.

src/tensor.rs

@@ -493,7 +493,7 @@ impl<T> SharedTensor<T> {
 }
 
 /// Errors than can occur when synchronizing memory.
-#[derive(Debug, Copy, Clone)]
+#[derive(Debug, Copy, Clone, PartialEq, Eq)]
 pub enum Error {
     /// No copy on source device.
     MissingSource(&'static str),

tests/shared_memory_specs.rs

@@ -4,6 +4,7 @@ extern crate libc;
 #[cfg(test)]
 mod shared_memory_spec {
     use co::prelude::*;
+    use co::tensor::Error;
 
     fn write_to_memory<T: Copy>(mem: &mut MemoryType, data: &[T]) {
         match mem {
@@ -59,6 +60,24 @@ mod shared_memory_spec {
         }
     }
 
+    #[test]
+    #[cfg(feature = "native")]
+    fn it_fails_on_initialized_memory_read() {
+        let ntv = Native::new();
+        let cpu = ntv.new_device(ntv.hardwares()).unwrap();
+        let shared_data = &mut SharedTensor::<f32>::new(&10).unwrap();
+        assert_eq!(shared_data.read(&cpu).unwrap_err(),
+                   Error::UninitializedMemory);
+        assert_eq!(shared_data.read_write(&cpu).unwrap_err(),
+                   Error::UninitializedMemory);
+
+        shared_data.write_only(&cpu).unwrap();
+        shared_data.drop_device(&cpu).unwrap();
+
+        assert_eq!(shared_data.read(&cpu).unwrap_err(),
+                   Error::UninitializedMemory);
+    }
+
     #[test]
     #[cfg(feature = "cuda")]
     fn it_syncs_from_native_to_cuda_and_back() {