use a mock sealing manager in the packet packer tests

internal/mocks/mockgen.go

@@ -1,6 +1,7 @@
 package mocks
 
 //go:generate sh -c "../mockgen_internal.sh mocks tls_extension_handler.go github.com/lucas-clemente/quic-go/internal/handshake TLSExtensionHandler"
+//go:generate sh -c "../mockgen_internal.sh mocks sealer.go github.com/lucas-clemente/quic-go/internal/handshake Sealer"
 //go:generate sh -c "../mockgen_internal.sh mocks stream_flow_controller.go github.com/lucas-clemente/quic-go/internal/flowcontrol StreamFlowController"
 //go:generate sh -c "../mockgen_internal.sh mockackhandler ackhandler/sent_packet_handler.go github.com/lucas-clemente/quic-go/internal/ackhandler SentPacketHandler"
 //go:generate sh -c "../mockgen_internal.sh mockackhandler ackhandler/received_packet_handler.go github.com/lucas-clemente/quic-go/internal/ackhandler ReceivedPacketHandler"

internal/mocks/sealer.go

@@ -0,0 +1,59 @@
+// Code generated by MockGen. DO NOT EDIT.
+// Source: github.com/lucas-clemente/quic-go/internal/handshake (interfaces: Sealer)
+
+// Package mocks is a generated GoMock package.
+package mocks
+
+import (
+	reflect "reflect"
+
+	gomock "github.com/golang/mock/gomock"
+	protocol "github.com/lucas-clemente/quic-go/internal/protocol"
+)
+
+// MockSealer is a mock of Sealer interface
+type MockSealer struct {
+	ctrl     *gomock.Controller
+	recorder *MockSealerMockRecorder
+}
+
+// MockSealerMockRecorder is the mock recorder for MockSealer
+type MockSealerMockRecorder struct {
+	mock *MockSealer
+}
+
+// NewMockSealer creates a new mock instance
+func NewMockSealer(ctrl *gomock.Controller) *MockSealer {
+	mock := &MockSealer{ctrl: ctrl}
+	mock.recorder = &MockSealerMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use
+func (m *MockSealer) EXPECT() *MockSealerMockRecorder {
+	return m.recorder
+}
+
+// Overhead mocks base method
+func (m *MockSealer) Overhead() int {
+	ret := m.ctrl.Call(m, "Overhead")
+	ret0, _ := ret[0].(int)
+	return ret0
+}
+
+// Overhead indicates an expected call of Overhead
+func (mr *MockSealerMockRecorder) Overhead() *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Overhead", reflect.TypeOf((*MockSealer)(nil).Overhead))
+}
+
+// Seal mocks base method
+func (m *MockSealer) Seal(arg0, arg1 []byte, arg2 protocol.PacketNumber, arg3 []byte) []byte {
+	ret := m.ctrl.Call(m, "Seal", arg0, arg1, arg2, arg3)
+	ret0, _ := ret[0].([]byte)
+	return ret0
+}
+
+// Seal indicates an expected call of Seal
+func (mr *MockSealerMockRecorder) Seal(arg0, arg1, arg2, arg3 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Seal", reflect.TypeOf((*MockSealer)(nil).Seal), arg0, arg1, arg2, arg3)
+}