add read_network_from buffers example (#138)

Co-authored-by: Vlad Kalmykov <[email protected]>

Author: BulbaWarrior

crates/openvino/tests/setup.rs

@@ -2,7 +2,9 @@
 mod fixtures;
 
 use fixtures::alexnet::Fixture;
-use openvino::Core;
+use openvino::{Core, Shape, Tensor};
+
+use std::fs;
 
 #[test]
 fn read_network() {
@@ -18,3 +20,23 @@ fn read_network() {
     assert_eq!(read_model.get_inputs_len(), Ok(1));
     assert_eq!(read_model.get_outputs_len(), Ok(1));
 }
+
+#[test]
+fn read_network_from_buffers() {
+    let mut core = Core::new().unwrap();
+    let graph = fs::read(&Fixture::graph()).unwrap();
+    let weights = {
+        let weights = fs::read(&Fixture::weights()).unwrap();
+        let shape = Shape::new(&[1, weights.len() as i64]).unwrap();
+        let mut tensor = Tensor::new(openvino::ElementType::U8, &shape).unwrap();
+        let buffer = tensor.get_raw_data_mut().unwrap();
+        buffer.copy_from_slice(&weights);
+        tensor
+    };
+
+    let read_model = core.read_model_from_buffer(&graph, Some(&weights)).unwrap();
+
+    // Check the number of inputs and outputs.
+    assert_eq!(read_model.get_inputs_len(), Ok(1));
+    assert_eq!(read_model.get_outputs_len(), Ok(1));
+}