64 lines
1.7 KiB
Go
64 lines
1.7 KiB
Go
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package agent
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import (
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"strings"
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"testing"
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)
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func TestHostIfaceName_Format(t *testing.T) {
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got := HostIfaceName("0123456789abcdef0123456789abcdef")
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if !strings.HasPrefix(got, "flock") || len(got) != len("flock")+8 {
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t.Fatalf("HostIfaceName=%q (want flock + 8 hex)", got)
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}
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}
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func TestHostIfaceName_Determinism(t *testing.T) {
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a := HostIfaceName("container-xyz")
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b := HostIfaceName("container-xyz")
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if a != b {
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t.Fatalf("not deterministic: %s vs %s", a, b)
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}
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}
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func TestHostIfaceName_DifferentInputs(t *testing.T) {
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a := HostIfaceName("a")
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b := HostIfaceName("b")
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if a == b {
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t.Fatalf("collision on trivial inputs")
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}
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}
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// FuzzHostIfaceName ensures the host interface name generator never produces
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// an output longer than IFNAMSIZ-1 (15 chars on Linux) and never panics.
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// The name format is "flock" + 8 hex chars = 13 chars, always.
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func FuzzHostIfaceName(f *testing.F) {
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f.Add("")
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f.Add("a")
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f.Add("/var/run/netns/abc")
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f.Add("0123456789abcdef0123456789abcdef")
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f.Add(longString("x", 64*1024)) // very long containerID
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f.Add("\x00\x00\x00")
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f.Add("ünïcødé/контейнер")
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f.Fuzz(func(t *testing.T, id string) {
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got := HostIfaceName(id)
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// Linux IFNAMSIZ is 16 (15 chars + NUL); ours must fit comfortably.
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if len(got) > 15 {
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t.Fatalf("HostIfaceName(%q)=%q exceeds 15 chars", id, got)
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}
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if !strings.HasPrefix(got, "flock") {
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t.Fatalf("HostIfaceName(%q)=%q missing prefix", id, got)
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}
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// Suffix must be lowercase hex (8 chars).
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suffix := got[len("flock"):]
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if len(suffix) != 8 {
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t.Fatalf("HostIfaceName(%q) suffix len=%d", id, len(suffix))
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}
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for _, c := range suffix {
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if !((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f')) {
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t.Fatalf("HostIfaceName(%q)=%q has non-hex suffix", id, got)
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}
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}
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})
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}
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