go - tool for managing Go source code
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
This manual page was written by Michael Stapelberg
<stapelberg@debian.org>, for the Debian project (and may be used by
others).