tree ef490cad98a7b58fadd8fadd32c2cba6ee1c71c6
parent 27223c43282e1910bc6316c7c425fd3512890d14
author Kaiyuan Wang <kaiyuanw@google.com> 1468518712 -0700
committer Kaiyuan Wang <kaiyuanw@google.com> 1468518712 -0700

feat(mdtest run/auto): support TAP (test anything protocol) test output
format and add --verbose flag for mdtest

mdtest now is able to report test output in TAP format.  If --format
option is set to '--format=tap', mdtest will run
"pub run test --reporter json" to collect test output in json format
and transform json output into tap output on the fly.  The default
behavior is '--format=none' which use the standard dart test output.

mdtest now support --verbose flag.  If -v or --verbose is specified,
printTrace() will direct output to the standard error stream.
Otherwise, printTrace() does nothing.

Replace some print invocation with logging print.

Change-Id: Ie98d7b61393a368ec06e6ad536d2226973e2d322