NAME

       go - tool for managing Go source code

DESCRIPTION

       The  'go  test'  command  takes  both  flags  that  apply to 'go test' itself and flags that apply to the
       resulting test binary.

       The test binary, called pkg.test, where pkg is the name of the directory containing the package  sources,
       has its own flags:

       -test.v
              Verbose output: log all tests as they are run.

       -test.run pattern
              Run only those tests and examples matching the regular expression.

       -test.bench pattern
              Run benchmarks matching the regular expression.  By default, no benchmarks run.

       -test.cpuprofile cpu.out
              Write a CPU profile to the specified file before exiting.

       -test.memprofile mem.out
              Write a memory profile to the specified file when all tests are complete.

       -test.memprofilerate n
              Enable more precise (and expensive) memory profiles by setting runtime.MemProfileRate.  See 'godoc
              runtime  MemProfileRate'.   To  profile all memory allocations, use -test.memprofilerate=1 and set
              the environment variable GOGC=off to disable the garbage collector, provided the test can  run  in
              the available memory without garbage collection.

       -test.parallel n
              Allow  parallel  execution  of test functions that call t.Parallel.  The value of this flag is the
              maximum number of tests to run simultaneously; by default, it is set to the value of GOMAXPROCS.

       -test.short
              Tell long-running tests to shorten their run time.  It is off by default but set  during  all.bash
              so that installing the Go tree can run a sanity check but not spend time running exhaustive tests.

       -test.timeout t
              If a test runs longer than t, panic.

       -test.benchtime n
              Run enough iterations of each benchmark to take n seconds.  The default is 1 second.

       -test.cpu 1,2,4
              Specify  a  list  of  GOMAXPROCS values for which the tests or benchmarks should be executed.  The
              default is the current value of GOMAXPROCS.

       For convenience, each of these -test.X flags of the test binary is also available as the flag -X  in  'go
       test' itself.  Flags not listed here are passed through unaltered.  For instance, the command

             go test -x -v -cpuprofile=prof.out -dir=testdata -update

       will compile the test binary and then run it as

             pkg.test -test.v -test.cpuprofile=prof.out -dir=testdata -update

AUTHOR

       This  manual  page was written by Michael Stapelberg <stapelberg@debian.org>, for the Debian project (and
       may be used by others).

                                                   2012-05-13                                     GO-TESTFLAG(7)