Golang bson.Unmarshal函数代码示例

func TestQueryResult(t *testing.T) {
	want := "\xcb\x00\x00\x00\x04Fields\x009\x00\x00\x00\x030\x001\x00\x00\x00\x05Name\x00\x04\x00\x00\x00\x00name\x12Type\x00\x01\x00\x00\x00\x00\x00\x00\x00\x12Flags\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x12RowsAffected\x00\x02\x00\x00\x00\x00\x00\x00\x00\x12InsertId\x00\x03\x00\x00\x00\x00\x00\x00\x00\x04Rows\x00 \x00\x00\x00\x040\x00\x18\x00\x00\x00\x050\x00\x01\x00\x00\x00\x001\x051\x00\x02\x00\x00\x00\x00aa\x00\x00\x03Err\x002\x00\x00\x00\x12Code\x00\xe8\x03\x00\x00\x00\x00\x00\x00\x05Message\x00\x11\x00\x00\x00\x00failed due to err\x00\x00"
	custom := QueryResult{
		Fields:       []Field{{"name", 1, VT_ZEROVALUE_FLAG}},
		RowsAffected: 2,
		InsertId:     3,
		Rows: [][]sqltypes.Value{
			{{sqltypes.Numeric("1")}, {sqltypes.String("aa")}},
		},
		Err: &RPCError{1000, "failed due to err"},
	}
	encoded, err := bson.Marshal(&custom)
	if err != nil {
		t.Error(err)
	}
	got := string(encoded)
	if want != got {
		t.Errorf("want\n%#v, got\n%#v", want, got)
	}

	var unmarshalled QueryResult
	err = bson.Unmarshal(encoded, &unmarshalled)
	if err != nil {
		t.Error(err)
	}
	if unmarshalled.Err == nil {
		t.Errorf("want %#v, got %#v", custom.Err, unmarshalled.Err)
	} else {
		if *custom.Err != *unmarshalled.Err {
			t.Errorf("want %#v, got %#v", custom.Err, unmarshalled.Err)
		}
	}
	if custom.RowsAffected != unmarshalled.RowsAffected {
		t.Errorf("want %v, got %#v", custom.RowsAffected, unmarshalled.RowsAffected)
	}
	if custom.InsertId != unmarshalled.InsertId {
		t.Errorf("want %v, got %#v", custom.InsertId, unmarshalled.InsertId)
	}
	if custom.Fields[0].Name != unmarshalled.Fields[0].Name {
		t.Errorf("want %v, got %#v", custom.Fields[0].Name, unmarshalled.Fields[0].Name)
	}
	if custom.Fields[0].Type != unmarshalled.Fields[0].Type {
		t.Errorf("want %v, got %#v", custom.Fields[0].Type, unmarshalled.Fields[0].Type)
	}
	if !bytes.Equal(custom.Rows[0][0].Raw(), unmarshalled.Rows[0][0].Raw()) {
		t.Errorf("want %s, got %s", custom.Rows[0][0].Raw(), unmarshalled.Rows[0][0].Raw())
	}
	if !bytes.Equal(custom.Rows[0][1].Raw(), unmarshalled.Rows[0][1].Raw()) {
		t.Errorf("want %s, got %s", custom.Rows[0][0].Raw(), unmarshalled.Rows[0][0].Raw())
	}

	extra, err := bson.Marshal(&extraQueryResult{})
	if err != nil {
		t.Error(err)
	}
	err = bson.Unmarshal(extra, &unmarshalled)
	if err != nil {
		t.Error(err)
	}
}

func TestQueryList(t *testing.T) {
	reflected, err := bson.Marshal(&reflectQueryList{
		Queries: []BoundQuery{{
			Sql:           "query",
			BindVariables: map[string]interface{}{"val": int64(1)},
		}},
		TransactionId: 1,
		SessionId:     2,
	})
	if err != nil {
		t.Error(err)
	}
	want := string(reflected)

	custom := QueryList{
		Queries: []BoundQuery{{
			Sql:           "query",
			BindVariables: map[string]interface{}{"val": int64(1)},
		}},
		TransactionId: 1,
		SessionId:     2,
	}
	encoded, err := bson.Marshal(&custom)
	if err != nil {
		t.Error(err)
	}
	got := string(encoded)
	if want != got {
		t.Errorf("want\n%#v, got\n%#v", want, got)
	}

	var unmarshalled QueryList
	err = bson.Unmarshal(encoded, &unmarshalled)
	if err != nil {
		t.Error(err)
	}
	if custom.TransactionId != unmarshalled.TransactionId {
		t.Errorf("want %v, got %v", custom.TransactionId, unmarshalled.TransactionId)
	}
	if custom.SessionId != unmarshalled.SessionId {
		t.Errorf("want %v, got %v", custom.SessionId, unmarshalled.SessionId)
	}
	if custom.Queries[0].Sql != unmarshalled.Queries[0].Sql {
		t.Errorf("want %v, got %v", custom.Queries[0].Sql, unmarshalled.Queries[0].Sql)
	}
	if custom.Queries[0].BindVariables["val"].(int64) != unmarshalled.Queries[0].BindVariables["val"].(int64) {
		t.Errorf("want %v, got %v", custom.Queries[0].BindVariables["val"], unmarshalled.Queries[0].BindVariables["val"])
	}

	unexpected, err := bson.Marshal(&badQueryList{})
	if err != nil {
		t.Error(err)
	}
	err = bson.Unmarshal(unexpected, &unmarshalled)
	want = "Unrecognized tag Extra"
	if err == nil || want != err.Error() {
		t.Errorf("want %v, got %v", want, err)
	}
}

func TestQueryResultList(t *testing.T) {
	reflected, err := bson.Marshal(&reflectQueryResultList{
		List: []mproto.QueryResult{{
			Fields:       []mproto.Field{{"name", 1}},
			RowsAffected: 2,
			InsertId:     3,
			Rows: [][]sqltypes.Value{
				{{sqltypes.String("1")}, {sqltypes.String("aa")}},
			},
		}},
		Session: &commonSession,
		Error:   "error",
	})
	if err != nil {
		t.Error(err)
	}
	want := string(reflected)

	custom := QueryResultList{
		List: []mproto.QueryResult{{
			Fields:       []mproto.Field{{"name", 1}},
			RowsAffected: 2,
			InsertId:     3,
			Rows: [][]sqltypes.Value{
				{{sqltypes.String("1")}, {sqltypes.String("aa")}},
			},
		}},
		Session: &commonSession,
		Error:   "error",
	}
	encoded, err := bson.Marshal(&custom)
	if err != nil {
		t.Error(err)
	}
	got := string(encoded)
	if want != got {
		t.Errorf("want\n%#v, got\n%#v", want, got)
	}

	var unmarshalled QueryResultList
	err = bson.Unmarshal(encoded, &unmarshalled)
	if err != nil {
		t.Error(err)
	}
	if !reflect.DeepEqual(custom, unmarshalled) {
		t.Errorf("want \n%#v, got \n%#v", custom, unmarshalled)
	}

	unexpected, err := bson.Marshal(&badQueryResultList{})

	if err != nil {
		t.Error(err)
	}
	err = bson.Unmarshal(unexpected, &unmarshalled)
	want = "Unrecognized tag Extra"
	if err == nil || want != err.Error() {
		t.Errorf("want %v, got %v", want, err)
	}
}

func TestQueryResultList(t *testing.T) {
	reflected, err := bson.Marshal(&reflectQueryResultList{
		List: []mproto.QueryResult{{
			Fields:       []mproto.Field{{"name", 1, mproto.VT_ZEROVALUE_FLAG}},
			RowsAffected: 2,
			InsertId:     3,
			Rows: [][]sqltypes.Value{
				{{sqltypes.String("1")}, {sqltypes.String("aa")}},
			},
		}},
		Session: &commonSession,
		Error:   "error",
	})
	if err != nil {
		t.Error(err)
	}
	want := string(reflected)

	custom := QueryResultList{
		List: []mproto.QueryResult{{
			Fields:       []mproto.Field{{"name", 1, mproto.VT_ZEROVALUE_FLAG}},
			RowsAffected: 2,
			InsertId:     3,
			Rows: [][]sqltypes.Value{
				{{sqltypes.String("1")}, {sqltypes.String("aa")}},
			},
		}},
		Session: &commonSession,
		Error:   "error",
	}
	encoded, err := bson.Marshal(&custom)
	if err != nil {
		t.Error(err)
	}
	got := string(encoded)
	if want != got {
		t.Errorf("want\n%+v, got\n%+v", want, got)
	}

	var unmarshalled QueryResultList
	err = bson.Unmarshal(encoded, &unmarshalled)
	if err != nil {
		t.Error(err)
	}
	if !reflect.DeepEqual(custom, unmarshalled) {
		t.Errorf("want \n%+v, got \n%+v", custom, unmarshalled)
	}

	extra, err := bson.Marshal(&extraQueryResultList{})
	if err != nil {
		t.Error(err)
	}
	err = bson.Unmarshal(extra, &unmarshalled)
	if err != nil {
		t.Error(err)
	}
}

func TestQuery(t *testing.T) {
	reflected, err := bson.Marshal(&reflectQuery{
		Sql:           "query",
		BindVariables: map[string]interface{}{"val": int64(1)},
		SessionId:     2,
		TransactionId: 1,
	})
	if err != nil {
		t.Error(err)
	}
	want := string(reflected)

	custom := Query{
		Sql:           "query",
		BindVariables: map[string]interface{}{"val": int64(1)},
		SessionId:     2,
		TransactionId: 1,
	}
	encoded, err := bson.Marshal(&custom)
	if err != nil {
		t.Error(err)
	}
	got := string(encoded)
	if want != got {
		t.Errorf("want\n%#v, got\n%#v", want, got)
	}

	var unmarshalled Query
	err = bson.Unmarshal(encoded, &unmarshalled)
	if err != nil {
		t.Error(err)
	}
	if custom.Sql != unmarshalled.Sql {
		t.Errorf("want %v, got %v", custom.Sql, unmarshalled.Sql)
	}
	if custom.TransactionId != unmarshalled.TransactionId {
		t.Errorf("want %v, got %v", custom.TransactionId, unmarshalled.TransactionId)
	}
	if custom.SessionId != unmarshalled.SessionId {
		t.Errorf("want %v, got %v", custom.SessionId, unmarshalled.SessionId)
	}
	if custom.BindVariables["val"].(int64) != unmarshalled.BindVariables["val"].(int64) {
		t.Errorf("want %v, got %v", custom.BindVariables["val"], unmarshalled.BindVariables["val"])
	}

	extra, err := bson.Marshal(&extraQuery{})
	if err != nil {
		t.Error(err)
	}
	err = bson.Unmarshal(extra, &unmarshalled)
	if err != nil {
		t.Error(err)
	}
}

func TestBinlogTransaction(t *testing.T) {
	reflected, err := bson.Marshal(&reflectBinlogTransaction{
		Statements: []reflectStatement{
			{
				Category: 1,
				Sql:      []byte("sql"),
			},
		},
		Timestamp: 456,
		GroupId:   123,
	})
	if err != nil {
		t.Error(err)
	}
	want := string(reflected)

	custom := BinlogTransaction{
		Statements: []Statement{
			{
				Category: 1,
				Sql:      []byte("sql"),
			},
		},
		Timestamp: 456,
		GroupId:   123,
	}
	encoded, err := bson.Marshal(&custom)
	if err != nil {
		t.Error(err)
	}
	got := string(encoded)
	if want != got {
		t.Errorf("want\n%#v, got\n%#v", want, got)
	}

	var unmarshalled BinlogTransaction
	err = bson.Unmarshal(encoded, &unmarshalled)
	if err != nil {
		t.Error(err)
	}
	if !reflect.DeepEqual(custom, unmarshalled) {
		t.Errorf("%#v != %#v", custom, unmarshalled)
	}

	extra, err := bson.Marshal(&extraBinlogTransaction{})
	if err != nil {
		t.Error(err)
	}
	err = bson.Unmarshal(extra, &unmarshalled)
	if err != nil {
		t.Error(err)
	}
}

func TestQueryResult(t *testing.T) {
	want := "\x85\x00\x00\x00\x04Fields\x00*\x00\x00\x00\x030\x00\"\x00\x00\x00\x05Name\x00\x04\x00\x00\x00\x00name\x12Type\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x12RowsAffected\x00\x02\x00\x00\x00\x00\x00\x00\x00\x12InsertId\x00\x03\x00\x00\x00\x00\x00\x00\x00\x04Rows\x00 \x00\x00\x00\x040\x00\x18\x00\x00\x00\x050\x00\x01\x00\x00\x00\x001\x051\x00\x02\x00\x00\x00\x00aa\x00\x00\x00"
	custom := QueryResult{
		Fields:       []Field{{"name", 1}},
		RowsAffected: 2,
		InsertId:     3,
		Rows: [][]sqltypes.Value{
			{{sqltypes.Numeric("1")}, {sqltypes.String("aa")}},
		},
	}
	encoded, err := bson.Marshal(&custom)
	if err != nil {
		t.Error(err)
	}
	got := string(encoded)
	if want != got {
		t.Errorf("want\n%#v, got\n%#v", want, got)
	}

	var unmarshalled QueryResult
	err = bson.Unmarshal(encoded, &unmarshalled)
	if err != nil {
		t.Error(err)
	}
	if custom.RowsAffected != unmarshalled.RowsAffected {
		t.Errorf("want %v, got %#v", custom.RowsAffected, unmarshalled.RowsAffected)
	}
	if custom.InsertId != unmarshalled.InsertId {
		t.Errorf("want %v, got %#v", custom.InsertId, unmarshalled.InsertId)
	}
	if custom.Fields[0].Name != unmarshalled.Fields[0].Name {
		t.Errorf("want %v, got %#v", custom.Fields[0].Name, unmarshalled.Fields[0].Name)
	}
	if custom.Fields[0].Type != unmarshalled.Fields[0].Type {
		t.Errorf("want %v, got %#v", custom.Fields[0].Type, unmarshalled.Fields[0].Type)
	}
	if !bytes.Equal(custom.Rows[0][0].Raw(), unmarshalled.Rows[0][0].Raw()) {
		t.Errorf("want %s, got %s", custom.Rows[0][0].Raw(), unmarshalled.Rows[0][0].Raw())
	}
	if !bytes.Equal(custom.Rows[0][1].Raw(), unmarshalled.Rows[0][1].Raw()) {
		t.Errorf("want %s, got %s", custom.Rows[0][0].Raw(), unmarshalled.Rows[0][0].Raw())
	}

	unexpected, err := bson.Marshal(&badQueryResult{})
	if err != nil {
		t.Error(err)
	}
	err = bson.Unmarshal(unexpected, &unmarshalled)
	want = "Unrecognized tag Extra"
	if err == nil || want != err.Error() {
		t.Errorf("want %v, got %v", want, err)
	}
}

func TestResponseBson(t *testing.T) {
	reflected, err := bson.Marshal(&reflectResponseBson{
		ServiceMethod: "aa",
		Seq:           1,
		Error:         "err",
	})
	if err != nil {
		t.Error(err)
	}
	want := string(reflected)

	custom := ResponseBson{
		&rpc.Response{
			ServiceMethod: "aa",
			Seq:           1,
			Error:         "err",
		},
	}
	encoded, err := bson.Marshal(&custom)
	if err != nil {
		t.Error(err)
	}
	got := string(encoded)
	if want != got {
		t.Errorf("want\n%#v, got\n%#v", want, got)
	}

	unmarshalled := ResponseBson{Response: new(rpc.Response)}
	err = bson.Unmarshal(encoded, &unmarshalled)
	if err != nil {
		t.Error(err)
	}
	if custom.ServiceMethod != unmarshalled.ServiceMethod {
		t.Errorf("want %v, got %#v", custom.ServiceMethod, unmarshalled.ServiceMethod)
	}
	if custom.Seq != unmarshalled.Seq {
		t.Errorf("want %v, got %#v", custom.Seq, unmarshalled.Seq)
	}
	if custom.Error != unmarshalled.Error {
		t.Errorf("want %v, got %#v", custom.Error, unmarshalled.Error)
	}

	unexpected, err := bson.Marshal(&badResponseBson{})
	if err != nil {
		t.Error(err)
	}
	err = bson.Unmarshal(unexpected, &unmarshalled)
	want = "Unrecognized tag Extra"
	if err == nil || want != err.Error() {
		t.Errorf("want %v, got %v", want, err)
	}
}

func TestBinlogTransaction(t *testing.T) {
	reflected, err := bson.Marshal(&reflectBinlogTransaction{
		Statements: []reflectStatement{
			{
				Category: 1,
				Sql:      []byte("sql"),
			},
		},
		GroupId: 123,
	})
	if err != nil {
		t.Error(err)
	}
	want := string(reflected)

	custom := BinlogTransaction{
		Statements: []Statement{
			{
				Category: 1,
				Sql:      []byte("sql"),
			},
		},
		GroupId: 123,
	}
	encoded, err := bson.Marshal(&custom)
	if err != nil {
		t.Error(err)
	}
	got := string(encoded)
	if want != got {
		t.Errorf("want\n%#v, got\n%#v", want, got)
	}

	var unmarshalled BinlogTransaction
	err = bson.Unmarshal(encoded, &unmarshalled)
	if err != nil {
		t.Error(err)
	}
	if !reflect.DeepEqual(custom, unmarshalled) {
		t.Errorf("%#v != %#v", custom, unmarshalled)
	}

	unexpected, err := bson.Marshal(&badBinlogTransaction{})
	if err != nil {
		t.Error(err)
	}
	err = bson.Unmarshal(unexpected, &unmarshalled)
	want = "Unrecognized tag Extra"
	if err == nil || want != err.Error() {
		t.Errorf("want %v, got %v", want, err)
	}
}

func TestStreamQueryKeyRange(t *testing.T) {
	reflected, err := bson.Marshal(&reflectStreamQueryKeyRange{
		Sql:           "query",
		BindVariables: map[string]interface{}{"val": int64(1)},
		Keyspace:      "keyspace",
		KeyRange:      "10-18",
		TabletType:    "replica",
		Session:       &commonSession,
	})

	if err != nil {
		t.Error(err)
	}
	want := string(reflected)

	custom := StreamQueryKeyRange{
		Sql:           "query",
		BindVariables: map[string]interface{}{"val": int64(1)},
		Keyspace:      "keyspace",
		KeyRange:      "10-18",
		TabletType:    "replica",
		Session:       &commonSession,
	}
	encoded, err := bson.Marshal(&custom)
	if err != nil {
		t.Error(err)
	}
	got := string(encoded)
	if want != got {
		t.Errorf("want\n%#v, got\n%#v", want, got)
	}

	var unmarshalled StreamQueryKeyRange
	err = bson.Unmarshal(encoded, &unmarshalled)
	if err != nil {
		t.Error(err)
	}
	if !reflect.DeepEqual(custom, unmarshalled) {
		t.Errorf("want \n%#v, got \n%#v", custom, unmarshalled)
	}

	unexpected, err := bson.Marshal(&badStreamQueryKeyRange{})
	if err != nil {
		t.Error(err)
	}
	err = bson.Unmarshal(unexpected, &unmarshalled)
	want = "Unrecognized tag Extra"
	if err == nil || want != err.Error() {
		t.Errorf("want %v, got %v", want, err)
	}
}

func TestQueryShard(t *testing.T) {
	reflected, err := bson.Marshal(&reflectQueryShard{
		Sql:           "query",
		BindVariables: map[string]interface{}{"val": int64(1)},
		Keyspace:      "keyspace",
		Shards:        []string{"shard1", "shard2"},
		TabletType:    topo.TabletType("replica"),
		Session:       &commonSession,
	})
	if err != nil {
		t.Error(err)
	}
	want := string(reflected)

	custom := QueryShard{
		Sql:           "query",
		BindVariables: map[string]interface{}{"val": int64(1)},
		Keyspace:      "keyspace",
		Shards:        []string{"shard1", "shard2"},
		TabletType:    topo.TabletType("replica"),
		Session:       &commonSession,
	}
	encoded, err := bson.Marshal(&custom)
	if err != nil {
		t.Error(err)
	}
	got := string(encoded)
	if want != got {
		t.Errorf("want\n%#v, got\n%#v", want, got)
	}

	var unmarshalled QueryShard
	err = bson.Unmarshal(encoded, &unmarshalled)
	if err != nil {
		t.Error(err)
	}
	if !reflect.DeepEqual(custom, unmarshalled) {
		t.Errorf("want \n%#v, got \n%#v", custom, unmarshalled)
	}

	unexpected, err := bson.Marshal(&badQueryShard{})
	if err != nil {
		t.Error(err)
	}
	err = bson.Unmarshal(unexpected, &unmarshalled)
	want = "Unrecognized tag Extra"
	if err == nil || want != err.Error() {
		t.Errorf("want %v, got %v", want, err)
	}
}

func TestKeyRangeQuery(t *testing.T) {
	reflected, err := bson.Marshal(&reflectKeyRangeQuery{
		Sql:           "query",
		BindVariables: map[string]interface{}{"val": int64(1)},
		Keyspace:      "keyspace",
		KeyRanges:     []kproto.KeyRange{kproto.KeyRange{Start: "10", End: "18"}},
		TabletType:    "replica",
		Session:       &commonSession,
	})

	if err != nil {
		t.Error(err)
	}
	want := string(reflected)

	custom := KeyRangeQuery{
		Sql:           "query",
		BindVariables: map[string]interface{}{"val": int64(1)},
		Keyspace:      "keyspace",
		KeyRanges:     []kproto.KeyRange{kproto.KeyRange{Start: "10", End: "18"}},
		TabletType:    "replica",
		Session:       &commonSession,
	}
	encoded, err := bson.Marshal(&custom)
	if err != nil {
		t.Error(err)
	}
	got := string(encoded)
	if want != got {
		t.Errorf("want\n%+v, got\n%+v", want, got)
	}

	var unmarshalled KeyRangeQuery
	err = bson.Unmarshal(encoded, &unmarshalled)
	if err != nil {
		t.Error(err)
	}
	if !reflect.DeepEqual(custom, unmarshalled) {
		t.Errorf("want \n%+v, got \n%+v", custom, unmarshalled)
	}

	extra, err := bson.Marshal(&extraKeyRangeQuery{})
	if err != nil {
		t.Error(err)
	}
	err = bson.Unmarshal(extra, &unmarshalled)
	if err != nil {
		t.Error(err)
	}
}

func TestSession(t *testing.T) {
	reflected, err := bson.Marshal(&reflectSession{
		InTransaction: true,
		ShardSessions: []*ShardSession{{
			Keyspace:      "a",
			Shard:         "0",
			TabletType:    topo.TabletType("replica"),
			TransactionId: 1,
		}, {
			Keyspace:      "b",
			Shard:         "1",
			TabletType:    topo.TabletType("master"),
			TransactionId: 2,
		}},
	})
	if err != nil {
		t.Error(err)
	}
	want := string(reflected)

	custom := commonSession
	encoded, err := bson.Marshal(&custom)
	if err != nil {
		t.Error(err)
	}
	got := string(encoded)
	if want != got {
		t.Errorf("want\n%#v, got\n%#v", want, got)
	}

	var unmarshalled Session
	err = bson.Unmarshal(encoded, &unmarshalled)
	if err != nil {
		t.Error(err)
	}
	if !reflect.DeepEqual(custom, unmarshalled) {
		t.Errorf("want \n%#v, got \n%#v", custom, unmarshalled)
	}

	unexpected, err := bson.Marshal(&badSession{})
	if err != nil {
		t.Error(err)
	}
	err = bson.Unmarshal(unexpected, &unmarshalled)
	want = "Unrecognized tag Extra"
	if err == nil || want != err.Error() {
		t.Errorf("want %v, got %v", want, err)
	}
}

func TestRun(t *testing.T) {
	for caseno, tcase := range testcases {
		actual, err := bson.Marshal(&tcase.qr)
		if err != nil {
			t.Errorf("Error on %d: %v", caseno, err)
		}
		if tcase.encoded != "" && string(actual) != tcase.encoded {
			t.Errorf("Expecting vs actual for %d:\n%#v\n%#v", caseno, tcase.encoded, string(actual))
		}
		var newqr Result
		err = bson.Unmarshal(actual, &newqr)
		if err != nil {
			t.Errorf("Error on %d: %v", caseno, err)
		}
		if len(newqr.Fields) == 0 {
			newqr.Fields = nil
		}
		if len(newqr.Rows) == 0 {
			newqr.Rows = nil
		}
		if !reflect.DeepEqual(newqr, tcase.qr) {
			t.Errorf("Case: %d,\n%#v, want\n%#v", caseno, newqr, tcase.qr)
		}
	}
}

func TestBsonMarshalUnmarshalReplicationPositionInStruct(t *testing.T) {
	gtidSetParsers["golf"] = func(s string) (GTIDSet, error) {
		return fakeGTID{flavor: "golf", value: s}, nil
	}
	input := ReplicationPosition{GTIDSet: fakeGTID{flavor: "golf", value: "par"}}
	want := ReplicationPosition{GTIDSet: fakeGTID{flavor: "golf", value: "par"}}

	type mystruct struct {
		ReplicationPosition
	}

	buf, err := bson.Marshal(&mystruct{ReplicationPosition: input})
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}

	var gotStruct mystruct
	if err = bson.Unmarshal(buf, &gotStruct); err != nil {
		t.Errorf("unexpected error: %v", err)
	}

	if got := gotStruct.ReplicationPosition; !got.Equal(want) {
		t.Errorf("marshal->unmarshal mismatch, got %#v, want %#v", got, want)
	}
}