test: Increase disconnectTimeout to reduce test flakes (#26)

* test: Increase disconnectTimeout to reduce test flakes

WebRTC uses UDP, which means a network connection is never open or closed. It uses timeouts to determine connection state; on a slow CI runner, these timeouts could be reached. Increasing this timeout should reduce flakes, but is unlikely to remove this flake entirely.

* Fix close after offline

* Run tests in parallel

peer/conn_test.go

@@ -23,7 +23,7 @@ import (
 )
 
 const (
-	disconnectedTimeout = time.Millisecond * 200
+	disconnectedTimeout = time.Second
 	failedTimeout       = disconnectedTimeout * 5
 	keepAliveInterval   = time.Millisecond * 2
 )
@@ -89,6 +89,7 @@ func TestConn(t *testing.T) {
 
 		sch, err := server.Accept(context.Background())
 		require.NoError(t, err)
+		defer sch.Close()
 
 		_ = cch.Close()
 		_, err = sch.Read(make([]byte, 4))
@@ -102,6 +103,7 @@ func TestConn(t *testing.T) {
 		require.NoError(t, err)
 		sch, err := server.Accept(context.Background())
 		require.NoError(t, err)
+		defer sch.Close()
 
 		err = wan.Stop()
 		require.NoError(t, err)
@@ -117,6 +119,7 @@ func TestConn(t *testing.T) {
 		require.NoError(t, err)
 		sch, err := server.Accept(context.Background())
 		require.NoError(t, err)
+		defer sch.Close()
 		go func() {
 			for i := 0; i < 1024; i++ {
 				_, err := cch.Write(make([]byte, 4096))