gotosocial/internal/transport/finger_test.go

/*
   GoToSocial
   Copyright (C) 2021-2023 GoToSocial Authors admin@gotosocial.org

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU Affero General Public License for more details.

   You should have received a copy of the GNU Affero General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

package transport_test

import (
	"context"
	"testing"

	"github.com/stretchr/testify/suite"
)

type FingerTestSuite struct {
	TransportTestSuite
}

func (suite *FingerTestSuite) TestFinger() {
	wc := suite.state.Caches.GTS.Webfinger()
	suite.Equal(0, wc.Len(), "expect webfinger cache to be empty")

	_, err := suite.transport.Finger(context.TODO(), "brand_new_person", "unknown-instance.com")
	if err != nil {
		suite.FailNow(err.Error())
	}

	suite.Equal(0, wc.Len(), "expect webfinger cache to be empty for normal webfinger request")
}

func (suite *FingerTestSuite) TestFingerWithHostMeta() {
	wc := suite.state.Caches.GTS.Webfinger()
	suite.Equal(0, wc.Len(), "expect webfinger cache to be empty")

	_, err := suite.transport.Finger(context.TODO(), "someone", "misconfigured-instance.com")
	if err != nil {
		suite.FailNow(err.Error())
	}

	suite.Equal(1, wc.Len(), "expect webfinger cache to hold one entry")
	suite.True(wc.Has("misconfigured-instance.com"), "expect webfinger cache to have entry for misconfigured-instance.com")
}

func (suite *FingerTestSuite) TestFingerWithHostMetaCacheStrategy() {
	wc := suite.state.Caches.GTS.Webfinger()
	suite.Equal(0, wc.Len(), "expect webfinger cache to be empty")

	_, err := suite.transport.Finger(context.TODO(), "someone", "misconfigured-instance.com")
	if err != nil {
		suite.FailNow(err.Error())
	}

	suite.Equal(1, wc.Len(), "expect webfinger cache to hold one entry")
	wc.Lock()
	suite.True(wc.Cache.Has("misconfigured-instance.com"), "expect webfinger cache to have entry for misconfigured-instance.com")
	ent, _ := wc.Cache.Get("misconfigured-instance.com")
	wc.Unlock()

	initialTime := ent.Expiry

	// finger them again
	_, err = suite.transport.Finger(context.TODO(), "someone", "misconfigured-instance.com")
	if err != nil {
		suite.FailNow(err.Error())
	}

	// there should still only be 1 cache entry
	suite.Equal(1, wc.Len(), "expect webfinger cache to hold one entry")
	wc.Lock()
	suite.True(wc.Cache.Has("misconfigured-instance.com"), "expect webfinger cache to have entry for misconfigured-instance.com")
	rep, _ := wc.Cache.Get("misconfigured-instance.com")
	wc.Unlock()

	repeatTime := rep.Expiry

	// the TTL of the entry should have extended because we did a second
	// successful finger
	suite.NotEqual(initialTime, repeatTime, "expected webfinger cache entry to have different expiry times")
	if repeatTime.Before(initialTime) {
		suite.FailNow("expected webfinger cache entry to not be a time traveller")
	}

	// finger a non-existing user on that same instance which will return an error
	_, err = suite.transport.Finger(context.TODO(), "invalid", "misconfigured-instance.com")
	if err == nil {
		suite.FailNow("expected request for invalid user to fail")
	}

	// there should still only be 1 cache entry, because we don't evict from cache on failure
	suite.Equal(1, wc.Len(), "expect webfinger cache to hold one entry")
	wc.Lock()
	suite.True(wc.Cache.Has("misconfigured-instance.com"), "expect webfinger cache to have entry for misconfigured-instance.com")
	last, _ := wc.Cache.Get("misconfigured-instance.com")
	wc.Unlock()

	lastTime := last.Expiry

	// The TTL of the previous and new entry should be the same since
	// a failed request must not extend the entry TTL
	suite.Equal(repeatTime, lastTime)
}

func TestFingerTestSuite(t *testing.T) {
	suite.Run(t, &FingerTestSuite{})
}