修改用例中敏感字符
Signed-off-by: Nlimeng <limeng151@huawei.com>
Change-Id: Ia1219e36fa60643720e6c086d446582dd372fe6f

In many places checking for nullptr is done using EXPECT test macros
that doesn't return from the function when condition is not met
(i.e. they are non-fatal). Lack of further error handling results
in a subsequent segfault. To avoid that in most places it's sufficient
to change macro type to ASSERT.
Signed-off-by: NRobert Drab <robert.drab@huawei.com>