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// Copyright 2023 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build !(windows || js || wasip1)
package main
import (
"regexp"
"strings"
"testing"
)
func TestExitCodeFilter(t *testing.T) {
// Write text to the filter one character at a time.
var out strings.Builder
f, exitStr := newExitCodeFilter(&out)
// Embed a "fake" exit code in the middle to check that we don't get caught on it.
pre := "abc" + exitStr + "123def"
text := pre + exitStr + `1`
for i := 0; i < len(text); i++ {
_, err := f.Write([]byte{text[i]})
if err != nil {
t.Fatal(err)
}
}
// The "pre" output should all have been flushed already.
if want, got := pre, out.String(); want != got {
t.Errorf("filter should have already flushed %q, but flushed %q", want, got)
}
code, err := f.Finish()
if err != nil {
t.Fatal(err)
}
// Nothing more should have been written to out.
if want, got := pre, out.String(); want != got {
t.Errorf("want output %q, got %q", want, got)
}
if want := 1; want != code {
t.Errorf("want exit code %d, got %d", want, code)
}
}
func TestExitCodeMissing(t *testing.T) {
var wantErr *regexp.Regexp
check := func(text string) {
t.Helper()
var out strings.Builder
f, exitStr := newExitCodeFilter(&out)
if want := "exitcode="; want != exitStr {
t.Fatalf("test assumes exitStr will be %q, but got %q", want, exitStr)
}
f.Write([]byte(text))
_, err := f.Finish()
// We should get a no exit code error
if err == nil || !wantErr.MatchString(err.Error()) {
t.Errorf("want error matching %s, got %s", wantErr, err)
}
// And it should flush all output (even if it looks
// like we may be getting an exit code)
if got := out.String(); text != got {
t.Errorf("want full output %q, got %q", text, got)
}
}
wantErr = regexp.MustCompile("^no exit code")
check("abc")
check("exitcode")
check("exitcode=")
check("exitcode=123\n")
wantErr = regexp.MustCompile("^bad exit code: .* value out of range")
check("exitcode=999999999999999999999999")
}
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