unkin-agent
30eee88d95
/dev/null is a character device, and so is the /dev/null the Go runtime reopens onto a closed fd 1, so a bare invocation printed help and exited zero for both -- the two shapes a machine caller is most likely to hand the binary.
26 lines
608 B
Go
26 lines
608 B
Go
//go:build linux
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package main
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import (
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"os"
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"syscall"
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"testing"
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)
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// The help-and-exit-zero branch is the whole point of the gate, and no CI
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// container has a controlling terminal to reach it through /dev/tty. A pty
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// allocated from /dev/ptmx is a real terminal, so the true branch is pinned
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// here instead of skipped.
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func TestIsTerminalDetectsAPTY(t *testing.T) {
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pty, err := os.OpenFile("/dev/ptmx", syscall.O_RDWR|syscall.O_NOCTTY, 0)
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if err != nil {
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t.Fatalf("open /dev/ptmx: %v", err)
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}
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t.Cleanup(func() { _ = pty.Close() })
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if !isTerminal(pty) {
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t.Error("a pty is a terminal")
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}
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}
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