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package dbus
import (
"fmt"
"os"
"os/exec"
"strconv"
"testing"
)
// How to mock exec.Command for unit tests
// https://stackoverflow.com/q/45789101/10513533
var mockedExitStatus = 0
var mockedStdout string
func fakeExecCommand(command string, args ...string) *exec.Cmd {
cs := []string{"-test.run=TestExecCommandHelper", "--", command}
cs = append(cs, args...)
cmd := exec.Command(os.Args[0], cs...)
es := strconv.Itoa(mockedExitStatus)
cmd.Env = []string{"GO_WANT_HELPER_PROCESS=1",
"STDOUT=" + mockedStdout,
"EXIT_STATUS=" + es}
return cmd
}
func TestExecCommandHelper(t *testing.T) {
if os.Getenv("GO_WANT_HELPER_PROCESS") != "1" {
return
}
fmt.Fprintf(os.Stdout, os.Getenv("STDOUT"))
i, _ := strconv.Atoi(os.Getenv("EXIT_STATUS"))
os.Exit(i)
}
func TestDbusLaunchMultilineResponse(t *testing.T) {
mockedExitStatus = 0
mockedStdout = `process 7616: D-Bus library appears to be incorrectly set up; failed to read machine uuid: UUID file '/etc/machine-id' should contain a hex string of length 32, not length 0, with no other text
See the manual page for dbus-uuidgen to correct this issue.
DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-0SO9YZUBGA,guid=ac22f2f3b9d228496b4d4b935cae3417
DBUS_SESSION_BUS_PID=7620
DBUS_SESSION_BUS_WINDOWID=16777217`
execCommand = fakeExecCommand
defer func() { execCommand = exec.Command }()
expOut := ""
expErr := "dbus: couldn't determine address of session bus"
out, err := getSessionBusPlatformAddress()
if out != expOut {
t.Errorf("Expected %q, got %q", expOut, out)
}
if err == nil {
t.Error("Excepted error, got none")
} else {
if err.Error() != expErr {
t.Errorf("Expected error to be %q, got %q", expErr, err.Error())
}
}
}
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