From 5f682c8ca5bad9b007da4adc7535d1d708bd9264 Mon Sep 17 00:00:00 2001
From: vyzo <vyzo@hackzen.org>
Date: Fri, 8 May 2020 10:19:31 +0300
Subject: [PATCH] add test for gossip_tracer

---
 gossip_tracer_test.go | 101 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 gossip_tracer_test.go

diff --git a/gossip_tracer_test.go b/gossip_tracer_test.go
new file mode 100644
index 0000000..3dcd5b2
--- /dev/null
+++ b/gossip_tracer_test.go
@@ -0,0 +1,101 @@
+package pubsub
+
+import (
+	"testing"
+	"time"
+
+	pb "github.com/libp2p/go-libp2p-pubsub/pb"
+
+	"github.com/libp2p/go-libp2p-core/peer"
+)
+
+func TestBrokenPromises(t *testing.T) {
+	// tests that unfullfilled promises are tracked correctly
+	originalGossipSubIWantFollowupTime := GossipSubIWantFollowupTime
+	GossipSubIWantFollowupTime = 100 * time.Millisecond
+	defer func() {
+		GossipSubIWantFollowupTime = originalGossipSubIWantFollowupTime
+	}()
+
+	gt := newGossipTracer()
+
+	peerA := peer.ID("A")
+	peerB := peer.ID("B")
+
+	var msgs []*pb.Message
+	var mids []string
+	for i := 0; i < 100; i++ {
+		m := makeTestMessage(i)
+		m.From = []byte(peerA)
+		msgs = append(msgs, m)
+		mid := DefaultMsgIdFn(m)
+		mids = append(mids, mid)
+	}
+
+	gt.AddPromise(peerA, mids)
+	gt.AddPromise(peerB, mids)
+
+	// no broken promises yet
+	brokenPromises := gt.GetBrokenPromises()
+	if brokenPromises != nil {
+		t.Fatal("expected no broken promises")
+	}
+
+	// make promises break
+	time.Sleep(GossipSubIWantFollowupTime + 10*time.Millisecond)
+
+	brokenPromises = gt.GetBrokenPromises()
+	if len(brokenPromises) != 2 {
+		t.Fatalf("expected 2 broken prmises, got %d", len(brokenPromises))
+	}
+
+	brokenPromisesA := brokenPromises[peerA]
+	if brokenPromisesA != 1 {
+		t.Fatalf("expected 1 broken promise from A, got %d", brokenPromisesA)
+	}
+
+	brokenPromisesB := brokenPromises[peerB]
+	if brokenPromisesB != 1 {
+		t.Fatalf("expected 1 broken promise from A, got %d", brokenPromisesB)
+	}
+}
+
+func TestNoBrokenPromises(t *testing.T) {
+	// like above, but this time we deliver messages to fullfil the promises
+	originalGossipSubIWantFollowupTime := GossipSubIWantFollowupTime
+	GossipSubIWantFollowupTime = 100 * time.Millisecond
+	defer func() {
+		GossipSubIWantFollowupTime = originalGossipSubIWantFollowupTime
+	}()
+
+	gt := newGossipTracer()
+
+	peerA := peer.ID("A")
+	peerB := peer.ID("B")
+
+	var msgs []*pb.Message
+	var mids []string
+	for i := 0; i < 100; i++ {
+		m := makeTestMessage(i)
+		m.From = []byte(peerA)
+		msgs = append(msgs, m)
+		mid := DefaultMsgIdFn(m)
+		mids = append(mids, mid)
+	}
+
+	gt.AddPromise(peerA, mids)
+	gt.AddPromise(peerB, mids)
+
+	for _, m := range msgs {
+		gt.DeliverMessage(&Message{Message: m})
+	}
+
+	time.Sleep(GossipSubIWantFollowupTime + 10*time.Millisecond)
+
+	// there should be no broken promises
+	brokenPromises := gt.GetBrokenPromises()
+	if brokenPromises != nil {
+		t.Fatal("expected no broken promises")
+	}
+
+}