# complain about that. It's a common way to skip testing a package
# entirely.
go test ./main_zero
! stdout 'skipping all tests'
stdout ^ok

# With -v, we'll see the warning from TestMain.
go test -v ./main_zero
stdout 'skipping all tests'
stdout ^ok

# Listing all tests won't actually give a result if TestMain exits. That's okay,
# because this is how TestMain works. If we decide to support -list even when

# Package with external tests
! go vet m/vetpkg
stderr 'Printf'

# With tags
! go vet -tags tagtest m/vetpkg
stderr 'c\.go.*Printf'

# With flags on
! go vet -printf m/vetpkg
stderr 'Printf'

# With flags off
go vet -printf=false m/vetpkg
! stderr .

# With only test files (tests issue #23395)
go vet m/onlytest
! stderr .

# With only cgo files (tests issue #24193)
[!cgo] skip
[short] skip
go vet m/onlycgo

This directory holds small tests and benchmarks of code
generated by the compiler.  This code is not for importing,
and the tests are intended to verify that specific optimizations

# Test that when there's a build failure and a -run flag that doesn't match,
# that the error for not matching tests does not override the error for
# the build failure.

! go test -run ThisWillNotMatch syntaxerror
! stderr '(?m)^ok.*\[no tests to run\]'
stdout 'FAIL'

-- go.mod --
module syntaxerror

go 1.16
-- x.go --
package p
-- x_test.go --
package p

func f() (x.y, z int) {

# Matches only subtests, parallel
go test -run Test/Sub/Nested standalone_parallel_sub_test.go
! stdout '^ok.*\[no tests to run\]'
! stderr '^ok.*\[no tests to run\]'
stdout '^ok'

-- standalone_parallel_sub_test.go --
package standalone_parallel_sub_test

import "testing"

func Test(t *testing.T) {
	ch := make(chan bool, 1)
	t.Run("Sub", func(t *testing.T) {
		t.Parallel()
		<-ch
		t.Run("Nested", func(t *testing.T) {})
	})

cmp stdout why-text-module.txt

# why a package used only in tests?
go mod why rsc.io/testonly
cmp stdout why-testonly.txt

# why a module used only in a test of a dependency?
go mod why -m rsc.io/testonly
cmp stdout why-testonly.txt

# test package not needed
go mod why golang.org/x/text/unused
cmp stdout why-unused.txt

# vendor doesn't use packages used only in tests.
go mod why -vendor rsc.io/testonly
cmp stdout why-vendor.txt

env MODFMT='{{.Path}}'


# 'go list -deps' lists packages and tests in the main module,
# along with their transitive dependencies.

go list -f $PKGFMT -deps ./...
stdout -count=4 '^.'
stdout '^example.com/a$'
stdout '^example.com/b$'
stdout '^example.com/main$'
stdout '^example.com/main/testonly'


# 'go list -deps -test' lists transitive imports of tests and non-tests in the
# main module.

go list -f $PKGFMT -deps -test ./...

# Tests golang.org/issue/14944

[!cgo] skip

go build -n foo.go
! stderr 'os.Stat .* no such file or directory' # there shouldn't be a stat of the archive file

-- foo.go --
package main

/*
#include <limits.h>
*/
import "C"

func main() {
        println(C.INT_MAX)

# Matches no subtests, parallel
go test -run Test/Sub/ThisWillNotMatch standalone_parallel_sub_test.go
stdout '^ok.*\[no tests to run\]'

-- standalone_parallel_sub_test.go --
package standalone_parallel_sub_test

import "testing"

func Test(t *testing.T) {
	ch := make(chan bool, 1)
	t.Run("Sub", func(t *testing.T) {
		t.Parallel()
		<-ch
		t.Run("Nested", func(t *testing.T) {})
	})

# Tests issue #12156, a former index out of range panic.

env GO111MODULE=off
env GOPATH=$WORK/gopath/src/testvendor2 # vendor/x is directly in $GOPATH, not in $GOPATH/src
cd $WORK/gopath/src/testvendor2/src/p

! go build p.go
! stderr panic # Make sure it doesn't panic
stderr 'cannot find package "x"'

-- testvendor2/src/p/p.go --
package p

import "x"
-- testvendor2/vendor/x/x.go --