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package net
import "testing"
// Regression: stripIAC required a third byte, so a trailing 2-byte IAC command
// leaked its option byte into player input.
func TestStripIACDropsTruncatedSequence(t *testing.T) {
got := stripIAC("abc" + string([]byte{iac, 0xf1}))
if got != "abc" {
t.Fatalf("stripIAC(truncated) = %q, want %q", got, "abc")
}
// A full subnegotiation is still removed.
got = stripIAC("x" + string([]byte{iac, sb, 1, 2}) + string([]byte{iac, se}) + "y")
if got != "xy" {
t.Fatalf("stripIAC(subnegotiation) = %q, want xy", got)
}
}
func TestStripIACPreservesInputAfterTwoByteCommand(t *testing.T) {
// A 2-byte command (NOP) in the middle must not eat the following byte.
if got := stripIAC("a" + string([]byte{iac, 0xf1}) + "b"); got != "ab" {
t.Fatalf("stripIAC(mid two-byte command) = %q, want %q", got, "ab")
}
// A 3-byte negotiation command consumes its option byte.
if got := stripIAC("a" + string([]byte{iac, will, echo}) + "b"); got != "ab" {
t.Fatalf("stripIAC(three-byte command) = %q, want %q", got, "ab")
}
// IAC IAC is an escaped literal 0xFF, not a command.
if got := stripIAC("a" + string([]byte{iac, iac}) + "b"); got != "a"+string([]byte{iac})+"b" {
t.Fatalf("stripIAC(escaped IAC) = %q, want literal 0xFF", got)
}
}
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