tests for MutBorrowLoc operation

Author: olympichek

crates/move-bytecode-verifier/src/type_safety_tests/mod.rs

@@ -121,7 +121,7 @@ fn add_simple_struct(module: &mut CompiledModule) {
         abilities: AbilitySet::EMPTY,
         type_parameters: vec![],
     };
-
+    
     module.struct_defs.push(struct_def);
     module.struct_handles.push(struct_handle);
 
@@ -1333,3 +1333,73 @@ fn test_imm_borrow_field_no_arg() {
     let _result = type_safety::verify(&module, &fun_context, &mut DummyMeter);
 }
 
+
+#[test]
+fn test_mut_borrow_field_correct_type() {
+    let code = vec![Bytecode::MutBorrowLoc(0), Bytecode::MutBorrowField(FieldHandleIndex(0))];
+    let mut module = make_module_with_local(code, SignatureToken::Struct(StructHandleIndex(0)));
+    add_simple_struct(&mut module);
+    let fun_context = get_fun_context(&module);
+    let result = type_safety::verify(&module, &fun_context, &mut DummyMeter);
+    assert!(result.is_ok());
+}
+
+#[test]
+fn test_mut_borrow_field_wrong_type() {
+    let code = vec![Bytecode::LdTrue, Bytecode::MutBorrowField(FieldHandleIndex(0))];
+    let mut module = make_module_with_local(code, SignatureToken::Struct(StructHandleIndex(0)));
+    add_simple_struct(&mut module);
+    let fun_context = get_fun_context(&module);
+    let result = type_safety::verify(&module, &fun_context, &mut DummyMeter);
+    assert_eq!(
+        result.unwrap_err().major_status(),
+        StatusCode::BORROWFIELD_TYPE_MISMATCH_ERROR
+    );
+
+    let code = vec![Bytecode::ImmBorrowLoc(0), Bytecode::MutBorrowField(FieldHandleIndex(0))];
+    let mut module = make_module_with_local(code, SignatureToken::Struct(StructHandleIndex(0)));
+    add_simple_struct(&mut module);
+    let fun_context = get_fun_context(&module);
+    let result = type_safety::verify(&module, &fun_context, &mut DummyMeter);
+    assert_eq!(
+        result.unwrap_err().major_status(),
+        StatusCode::BORROWFIELD_TYPE_MISMATCH_ERROR
+    );
+
+}
+
+#[test]
+fn test_mut_borrow_field_mismatched_types() {
+    let code = vec![Bytecode::MutBorrowLoc(0), Bytecode::MutBorrowField(FieldHandleIndex(0))];
+    let mut module = make_module_with_local(code, SignatureToken::U64);
+    add_simple_struct(&mut module);
+    let fun_context = get_fun_context(&module);
+    let result = type_safety::verify(&module, &fun_context, &mut DummyMeter);
+    assert_eq!(
+        result.unwrap_err().major_status(),
+        StatusCode::BORROWFIELD_TYPE_MISMATCH_ERROR
+    );
+}
+
+#[test]
+fn test_mut_borrow_field_bad_field() {
+    let code = vec![Bytecode::MutBorrowLoc(0), Bytecode::MutBorrowField(FieldHandleIndex(0))];
+    let mut module = make_module_with_local(code, SignatureToken::Struct(StructHandleIndex(0)));
+    add_native_struct(&mut module);
+    let fun_context = get_fun_context(&module);
+    let result = type_safety::verify(&module, &fun_context, &mut DummyMeter);
+    assert_eq!(
+        result.unwrap_err().major_status(),
+        StatusCode::BORROWFIELD_BAD_FIELD_ERROR
+    );
+}
+
+#[test]
+#[should_panic]
+fn test_mut_borrow_field_no_arg() {
+    let code = vec![Bytecode::MutBorrowField(FieldHandleIndex(0))];
+    let mut module = make_module_with_local(code, SignatureToken::Struct(StructHandleIndex(0)));
+    add_simple_struct(&mut module);
+    let fun_context = get_fun_context(&module);
+    let _result = type_safety::verify(&module, &fun_context, &mut DummyMeter);
+}