'tcp' is a real test suite, used here as an example.

$ test.py --suite=tcp runs the test, as expected.

However, using part of the test name:

$ test.py --suite=tc

reports 1 of 1 tests passed, even though 

$ test-runner --test-name=tc

runs no tests.


Details:

$ ./test.py -vns tc
...

Launch utils/ns3-dev-test-runner-debug --test-name=tc --stop-on-failure
Synchronously execute build/utils/ns3-dev-test-runner-debug --test-name=tc --stop-on-failure --xml --tempdir=testpy-output/2012-08-24-22-26-52-CUT --out=testpy-output/2012-08-24-22-26-52-CUT/tc.xml 
...

PASS: TestSuite tc
1 of 1 tests passed (1 passed, 0 skipped, 0 failed, 0 crashed, 0 valgrind errors)


But test-runner does this:

$ ./waf --run "test-runner  --test-name=tc --verbose --stop-on-failure --xml"
Waf: Entering directory `build'
Waf: Leaving directory `build'
'build' finished successfully (2.517s)

Note that no test were done.