Function assert_cuda_ok

tests/test_expanded_tensor_ops.cpp:17–20

}

static void assert_cuda_ok(const char* step) {
    cudaError_t err = sync_and_check();
    ASSERT_EQ(err, cudaSuccess) << step << ": " << cudaGetErrorString(err);
}

class ExpandedTensorOpsTest : public ::testing::Test {
protected: