Signed-off-by: yelin10 <yelin10@huawei.com>

【communication_lite】【L1-lwip】忽略 SIGPIPE 信号，避免测试用例在send时挂掉
Signed-off-by: Nwkejing <wkejing9687@163.com>

Signed-off-by: Nshuxiong <shuxiong@huawei.com>

Signed-off-by: Nluozhewen <luozhewen@huawei.com>

Signed-off-by: Nluozhewen <luozhewen@huawei.com>

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>