add leaks tests

tests/testswitch.nim

@@ -38,6 +38,47 @@ suite "Switch":
       check tracker.isLeaked() == false
 
   test "e2e use switch dial proto string":
+    proc testSwitch() {.async, gcsafe.} =
+      let done = newFuture[void]()
+      proc handle(conn: Connection, proto: string) {.async, gcsafe.} =
+        try:
+          let msg = string.fromBytes(await conn.readLp(1024))
+          check "Hello!" == msg
+          await conn.writeLp("Hello!")
+        finally:
+          await conn.close()
+          done.complete()
+
+      let testProto = new TestProto
+      testProto.codec = TestCodec
+      testProto.handler = handle
+
+      let switch1 = newStandardSwitch()
+      switch1.mount(testProto)
+
+      let switch2 = newStandardSwitch()
+      var awaiters: seq[Future[void]]
+      awaiters.add(await switch1.start())
+      awaiters.add(await switch2.start())
+
+      let conn = await switch2.dial(switch1.peerInfo, TestCodec)
+      await conn.writeLp("Hello!")
+      let msg = string.fromBytes(await conn.readLp(1024))
+      check "Hello!" == msg
+      await conn.close()
+
+      await all(
+        done.wait(5.seconds), #[if OK won't happen!!]#
+        switch1.stop(),
+        switch2.stop(),
+      )
+
+      # this needs to go at end
+      await all(awaiters)
+
+    waitFor(testSwitch())
+
+  test "e2e should not leak bufferstreams and connections on channel close":
     proc testSwitch() {.async, gcsafe.} =
       let done = newFuture[void]()
       proc handle(conn: Connection, proto: string) {.async, gcsafe.} =