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//go:build linux
package trap // import "github.com/docker/docker/cmd/dockerd/trap"
import (
"os"
"os/exec"
"syscall"
"testing"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
)
func buildTestBinary(t *testing.T, tmpdir string, prefix string) (string, string) {
t.Helper()
tmpDir, err := os.MkdirTemp(tmpdir, prefix)
assert.NilError(t, err)
exePath := tmpDir + "/" + prefix
wd, _ := os.Getwd()
testHelperCode := wd + "/testfiles/main.go"
cmd := exec.Command("go", "build", "-o", exePath, testHelperCode)
err = cmd.Run()
assert.NilError(t, err)
return exePath, tmpDir
}
func TestTrap(t *testing.T) {
sigmap := []struct {
name string
signal os.Signal
multiple bool
}{
{"TERM", syscall.SIGTERM, false},
{"INT", os.Interrupt, false},
{"TERM", syscall.SIGTERM, true},
{"INT", os.Interrupt, true},
}
exePath, tmpDir := buildTestBinary(t, "", "main")
defer os.RemoveAll(tmpDir)
for _, v := range sigmap {
t.Run(v.name, func(t *testing.T) {
cmd := exec.Command(exePath)
cmd.Env = append(os.Environ(), "SIGNAL_TYPE="+v.name)
if v.multiple {
cmd.Env = append(cmd.Env, "IF_MULTIPLE=1")
}
err := cmd.Start()
assert.NilError(t, err)
err = cmd.Wait()
e, ok := err.(*exec.ExitError)
assert.Assert(t, ok, "expected exec.ExitError, got %T", e)
code := e.Sys().(syscall.WaitStatus).ExitStatus()
if v.multiple {
assert.Check(t, is.DeepEqual(128+int(v.signal.(syscall.Signal)), code))
} else {
assert.Check(t, is.Equal(99, code))
}
})
}
}
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