IVGCVSW-4692 HAL 1.3 VTS/NNT, Unit test Failures

* Check if the model is prepared.

Signed-off-by: Sadik Armagan <sadik.armagan@arm.com>
Change-Id: Ia6ea7c5b61a1da97acddddfc5431925cbb4f0227
diff --git a/test/DriverTestHelpers.cpp b/test/DriverTestHelpers.cpp
index 0bc0cf7..18e3377 100644
--- a/test/DriverTestHelpers.cpp
+++ b/test/DriverTestHelpers.cpp
@@ -182,6 +182,7 @@
 android::sp<ExecutionCallback> ExecuteNoWait(android::sp<V1_0::IPreparedModel> preparedModel,
                                              const V1_0::Request& request)
 {
+    BOOST_TEST(preparedModel.get() != nullptr);
     android::sp<ExecutionCallback> cb(new ExecutionCallback());
     BOOST_TEST(preparedModel->execute(request, cb) == V1_0::ErrorStatus::NONE);
     ALOGI("ExecuteNoWait: returning callback object");