crosperf: do not allow more than one story tags in test_args
This patch added a check at stage of parsing benchmark, to ensure that
story tag only appear once in test_args. This is because more than one
story tags will cause an implicit failure when running benchmark on DUT
and crosperf cannot catch it.
BUG=chromium:902466
TEST=Passed unit tests and a simple test
Change-Id: Ic8e4aa19928911fb4ed03529ab89471856cec05c
Reviewed-on: https://chromium-review.googlesource.com/1330010
Commit-Ready: Zhizhou Yang <zhizhouy@google.com>
Tested-by: Zhizhou Yang <zhizhouy@google.com>
Reviewed-by: Caroline Tice <cmtice@chromium.org>
2 files changed
