package executils

import (
	"errors"
	"io"
	"os"
	"testing"
)

func TestIsBenignPipeReadError(t *testing.T) {
	tests := []struct {
		name string
		err  error
		want bool
	}{
		{name: "nil", err: nil, want: false},
		{name: "eof", err: io.EOF, want: true},
		{name: "closed", err: os.ErrClosed, want: true},
		{name: "closed pipe", err: io.ErrClosedPipe, want: true},
		{name: "wrapped closed", err: errors.New("read |0: file already closed"), want: true},
		{name: "other", err: errors.New("permission denied"), want: false},
	}

	for _, tc := range tests {
		t.Run(tc.name, func(t *testing.T) {
			got := isBenignPipeReadError(tc.err)
			if got != tc.want {
				t.Fatalf("got %v, want %v (err=%v)", got, tc.want, tc.err)
			}
		})
	}
}