test(09-03): add failing test for stealth UA pool

pkg/recon/stealth_test.go

@@ -0,0 +1,38 @@
+package recon
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestUAPoolSize(t *testing.T) {
+	require.Len(t, userAgents, 10, "UA pool must contain exactly 10 entries")
+}
+
+func TestRandomUserAgentInPool(t *testing.T) {
+	pool := make(map[string]struct{}, len(userAgents))
+	for _, ua := range userAgents {
+		pool[ua] = struct{}{}
+	}
+	for i := 0; i < 100; i++ {
+		got := RandomUserAgent()
+		_, ok := pool[got]
+		require.True(t, ok, "RandomUserAgent returned value not in pool: %q", got)
+	}
+}
+
+func TestStealthHeadersHasUA(t *testing.T) {
+	h := StealthHeaders()
+	ua, ok := h["User-Agent"]
+	require.True(t, ok, "StealthHeaders missing User-Agent")
+	require.NotEmpty(t, ua)
+	require.Equal(t, "en-US,en;q=0.9", h["Accept-Language"])
+
+	pool := make(map[string]struct{}, len(userAgents))
+	for _, u := range userAgents {
+		pool[u] = struct{}{}
+	}
+	_, inPool := pool[ua]
+	require.True(t, inPool, "StealthHeaders User-Agent not in pool: %q", ua)
+}