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a new test-case with some comments

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This commit is contained in:
Mathieu Lacage
2007-11-15 13:44:58 +01:00
parent b52be989ed
commit 0394180213
1 changed files with 25 additions and 2 deletions
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27
src/devices/wifi/dcf-manager-test.cc
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@@ -284,11 +284,15 @@ DcfManagerTest::RunTests (void)
ExpectAccessGranted (10, 0);
EndTest ();
// The test below mainly intends to test the case where the medium
// becomes busy in the middle of a backoff slot: the backoff counter
// must not be decremented for this backoff slot. This is the case
// below for the backoff slot starting at time 78us.
//
// 20 60 66 70 74 78 80 100 106 110 114 118
// | rx | sifs | aifsn | bslot0 | bslot1 | | rx | sifs | aifsn | bslot2 | bslot3 |
//
//
// |
// 30 request access. backoff slots: 4
StartTest (4, 6 , 10);
AddDcfState (8, 64, 1);
AddRxOkEvt (20, 40);
@@ -298,6 +302,25 @@ DcfManagerTest::RunTests (void)
ExpectAccessGranted (118, 0);
EndTest ();
// The test below is subject to some discussion because I am
// not sure I understand the intent of the spec here.
// i.e., what happens if you make a request to get access
// to the medium during the difs idle time after a busy period ?
// do you need to start a backoff ? Or do you need to wait until
// the end of difs and access the medium ?
// Here, we wait until the end of difs and access the medium.
//
// 20 60 66 70
// | rx | sifs | aifsn |
// |
// 62 request access.
//
StartTest (4, 6 , 10);
AddDcfState (8, 64, 1);
AddRxOkEvt (20, 40);
AddAccessRequest (62, 0);
ExpectAccessGranted (70, 0);
EndTest ();
return m_result;
}