Add discovery tests

tests/storage/testdiscovery.nim

@@ -0,0 +1,50 @@
+import std/[net, options, sequtils]
+import pkg/libp2p/[multiaddress, routing_record]
+
+import ../asynctest
+import ./helpers
+import ../../storage/discovery
+import ../../storage/rng
+
+suite "Discovery - SPR record logic":
+  var key: PrivateKey
+  var disc: Discovery
+
+  let
+    directAddr = MultiAddress.init("/ip4/1.2.3.4/tcp/4001").expect("valid")
+    relayAddr = MultiAddress
+      .init(
+        "/ip4/5.6.7.8/tcp/4002/p2p/16Uiu2HAmQu456Ae52JqPuqog6wCex47LLvNY8oHMBC4GRRtaStHs/p2p-circuit"
+      )
+      .expect("valid")
+    udpPort = Port(8090)
+
+  setup:
+    key = PrivateKey.random(Rng.instance[]).get()
+    disc = Discovery.new(key, announceAddrs = @[])
+
+  test "updateRecordsAndSpr sets the SPR with both TCP and UDP addresses":
+    disc.updateRecordsAndSpr(@[directAddr], udpPort)
+
+    let spr = disc.getSpr()
+    check spr.isSome
+    let addrs = spr.get.data.addresses.mapIt($it.address)
+    check addrs.anyIt(it.contains("/tcp/"))
+    check addrs.anyIt(it.contains("/udp/"))
+
+  test "updateAnnounceRecord does not update the SPR":
+    disc.updateRecordsAndSpr(@[directAddr], udpPort)
+    let sprBefore = disc.getSpr()
+
+    disc.updateAnnounceRecord(@[relayAddr])
+
+    check disc.getSpr() == sprBefore
+
+  test "updateDhtRecord deprecated does not update the SPR":
+    disc.updateRecordsAndSpr(@[directAddr], udpPort)
+    let sprBefore = disc.getSpr()
+
+    let otherUdpAddr = MultiAddress.init("/ip4/9.9.9.9/udp/9999").expect("valid")
+    disc.updateDhtRecord(@[otherUdpAddr])
+
+    check disc.getSpr() == sprBefore