fix: update to go 1.15 lint warnings

internal/sessionmanager/sessionmanager_test.go

@@ -2,6 +2,7 @@ package sessionmanager
 
 import (
 	"context"
+	"fmt"
 	"sync"
 	"testing"
 	"time"
@@ -118,7 +119,7 @@ func TestReceiveFrom(t *testing.T) {
 	pm := &fakePeerManager{}
 	sm := New(ctx, sessionFactory, sim, peerManagerFactory, bpm, pm, notif, "")
 
-	p := peer.ID(123)
+	p := peer.ID(fmt.Sprint(123))
 	block := blocks.NewBlock([]byte("block"))
 
 	firstSession := sm.NewSession(ctx, time.Second, delay.Fixed(time.Minute)).(*fakeSession)
@@ -165,7 +166,7 @@ func TestReceiveBlocksWhenManagerShutdown(t *testing.T) {
 	pm := &fakePeerManager{}
 	sm := New(ctx, sessionFactory, sim, peerManagerFactory, bpm, pm, notif, "")
 
-	p := peer.ID(123)
+	p := peer.ID(fmt.Sprint(123))
 	block := blocks.NewBlock([]byte("block"))
 
 	firstSession := sm.NewSession(ctx, time.Second, delay.Fixed(time.Minute)).(*fakeSession)
@@ -199,7 +200,7 @@ func TestReceiveBlocksWhenSessionContextCancelled(t *testing.T) {
 	pm := &fakePeerManager{}
 	sm := New(ctx, sessionFactory, sim, peerManagerFactory, bpm, pm, notif, "")
 
-	p := peer.ID(123)
+	p := peer.ID(fmt.Sprint(123))
 	block := blocks.NewBlock([]byte("block"))
 
 	firstSession := sm.NewSession(ctx, time.Second, delay.Fixed(time.Minute)).(*fakeSession)
@@ -235,7 +236,7 @@ func TestShutdown(t *testing.T) {
 	pm := &fakePeerManager{}
 	sm := New(ctx, sessionFactory, sim, peerManagerFactory, bpm, pm, notif, "")
 
-	p := peer.ID(123)
+	p := peer.ID(fmt.Sprint(123))
 	block := blocks.NewBlock([]byte("block"))
 	cids := []cid.Cid{block.Cid()}
 	firstSession := sm.NewSession(ctx, time.Second, delay.Fixed(time.Minute)).(*fakeSession)

internal/testutil/testutil.go

 package testutil
 
 import (
+	"fmt"
 	"math/rand"
 
 	bsmsg "github.com/ipfs/go-bitswap/message"
@@ -59,7 +60,7 @@ func GeneratePeers(n int) []peer.ID {
 	peerIds := make([]peer.ID, 0, n)
 	for i := 0; i < n; i++ {
 		peerSeq++
-		p := peer.ID(peerSeq)
+		p := peer.ID(fmt.Sprint(i))
 		peerIds = append(peerIds, p)
 	}
 	return peerIds