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main_test.go
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main_test.go
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package main
import (
"os"
"os/exec"
"testing"
)
func TestMainForMissingArgumentExec(t *testing.T) {
if os.Getenv("DO_CRASH") == "1" {
main()
return
}
cmd := exec.Command(os.Args[0], "-test.run=TestMainForMissingArgumentExec")
cmd.Env = append(os.Environ(), "DO_CRASH=1")
err := cmd.Run()
if e, ok := err.(*exec.ExitError); ok && !e.Success() {
return
}
t.Fatalf("process ran with err %v, want exit status 1", err)
}
func TestMainForWrongArgumentExec(t *testing.T) {
if os.Getenv("DO_CRASH") == "1" {
main()
return
}
cmd := exec.Command(os.Args[0], "-test.run=TestMainForWrongArgumentExec", "ABC")
cmd.Env = append(os.Environ(), "DO_CRASH=1")
err := cmd.Run()
if e, ok := err.(*exec.ExitError); ok && !e.Success() {
return
}
t.Fatalf("process ran with err %v, want exit status 1", err)
}
func TestMain(t *testing.T) {
old := os.Stdout
os.Stdout, _ = os.Open(os.DevNull)
os.Args = append(os.Args, "10")
main()
os.Stdout = old
}
func TestParseCommandLine(t *testing.T) {
os.Args = []string{""}
os.Args = append(os.Args, "123")
v, err := parseCommandline()
if err != nil {
t.Errorf("Expecting success, got error")
}
if v != 123 {
t.Errorf("Expected 10 got %v", v)
}
}
func TestForMissingArgument(t *testing.T) {
os.Args = []string{""}
_, err := parseCommandline()
if err == nil {
t.Errorf("Expecting missing parameter error. Got success")
}
}
func TestForWrongArgument(t *testing.T) {
os.Args = []string{""}
os.Args = append(os.Args, "ABC")
_, err := parseCommandline()
if err == nil {
t.Errorf("Expecting wrong parameter error. Got success")
}
}