! go build m/testonly m/testonly...
stderr 'no non-test Go files in'
! go install ./testonly
stderr 'no non-test Go files in'

# Named through a wildcard, the test-only packages should be silently ignored.
go build m/testonly...
go install ./testonly...

-- go.mod --
module m

go 1.16
-- testonly/t_test.go --
package testonly
-- testonly2/t.go --

rsc.io/sampler
golang.org/x/text/language
-- why-testonly.txt --
# rsc.io/testonly
mymodule/y
mymodule/y.test
rsc.io/quote
rsc.io/sampler
rsc.io/sampler.test
rsc.io/testonly
-- why-vendor.txt --
# rsc.io/testonly
(main module does not need to vendor package rsc.io/testonly)
-- why-vendor-module.txt --
# rsc.io/testonly
(main module does not need to vendor module rsc.io/testonly)
-- why-both.txt --

exec git init

# The test binaries should not have VCS settings stamped by default.
# (The test itself verifies that.)
go test . ./testonly

# However, setting -buildvcs explicitly should override that and
# stamp anyway (https://go.dev/issue/52648).
go test -buildvcs -c -o ./testonly.exe ./testonly
! exec ./testonly.exe
stdout 'unexpected VCS setting: vcs\.modified=true'


# Remove 'git' from $PATH. The test should still build.

[[
    genrule(
        name = "gen_" + config_file,
        testonly = 1,
        srcs = [template_file],
        outs = [config_file],
        cmd = ("sed " + sed_replace + " " +
               "$(location " + template_file + ") " +
               "> $(OUTS)"),
        tags = ["manual"],
    ),
    tf_library(
        name = bench_name,
        testonly = 1,
        config = config_file,

stdout '^example.com/main.test$'
stdout '^example.com/main \[example.com/main.test\]$'
stdout '^example.com/main_test \[example.com/main.test\]$'
stdout '^example.com/main/testonly$'
stdout '^example.com/main/testonly.test$'
stdout '^example.com/main/testonly_test \[example.com/main/testonly.test\]$'
stdout '^example.com/q$'
stdout '^example.com/r$'
stdout '^example.com/t$'
stdout '^example.com/u$'

rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
rsc.io/testonly v1.0.0 h1:K/VWHdO+Jv7woUXG0GzVNx1czBXUt3Ib1deaMn+xk64=
rsc.io/testonly v1.0.0/go.mod h1:OqmGbIFOcF+XrFReLOGZ6BhMM7uMBiQwZsyNmh74SzY=
-- golden.sum --
golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c h1:pvCbr/wm8HzDD3fVywevekufpn6tCGPY3spdHeZJEsw=

    /**
     * Publishes an event of global modification of the module state of all [KtModule]s.
     */
    @TestOnly
    public abstract fun publishGlobalModuleStateModification()

    /**
     * Publishes an event of global modification of the module state of all source [KtModule]s.
     */
    @TestOnly
    public abstract fun publishGlobalSourceModuleStateModification()

    /**

import com.intellij.openapi.project.Project
import org.jetbrains.annotations.TestOnly
import org.jetbrains.kotlin.analysis.api.platform.analysisMessageBus

public abstract class KotlinGlobalModificationServiceBase(private val project: Project) : KotlinGlobalModificationService() {
    @TestOnly
    protected abstract fun incrementModificationTrackers(includeBinaryTrackers: Boolean)

    @TestOnly
    override fun publishGlobalModuleStateModification() {

# without the -t flag shouldn't error out if the test has missing dependencies.

go get example.net/testonly@v0.1.0

# With the -t flag, the test dependencies must resolve successfully.
! go get -t example.net/testonly@v0.1.0
stderr '^go: example.net/testonly tested by\n\texample.net/testonly\.test imports\n\texample.net/missing: cannot find module providing package example.net/missing$'

rsc.io/testonly v1.0.0
written by hand

-- .mod --
module rsc.io/testonly
-- .info --
{"Version":"v1.0.0"}
-- testonly.go --