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>

Change-Id: I3ad8064485ced9689f1d13feb27d63d6d96af9cc

测试用例中遍历了32个pipe，其中有pipe被其他进程使用测试失败
删除遍历的操作，此处没有必要测试

Change-Id: I06414c93909fed65152c42c983ddf4ffe419d702

Reviewed-by: caoruihong and wangmihu

Reviewed-by: liulei, shenwei

Change-Id: I7baba352c02b78aefc81fc5eca000d840d3b2fe3

Merge pull request !9 from lilianglaoding/master

Merge pull request !6 from deltree/N/A