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//go:build linux || darwin

package terminal

import "testing"

func TestShellOrDefault(t *testing.T) {
	if got := shellOrDefault("/bin/zsh"); got != "/bin/zsh" {
		t.Errorf("shellOrDefault() = %q, want the shell asked for", got)
	}

	t.Setenv("SHELL", "/bin/ksh")
	if got := shellOrDefault(""); got != "/bin/ksh" {
		t.Errorf("shellOrDefault() = %q, want the user's own shell", got)
	}

	t.Setenv("SHELL", "")
	if got := shellOrDefault(""); got != "/bin/sh" {
		t.Errorf("shellOrDefault() = %q, want the fallback", got)
	}
}