acceptance_test.go

// Copyright © 2022 Meroxa, Inc. & Gophers Lab Technologies Pvt. Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package redis

import (
	"fmt"
	"math/rand"
	"strings"
	"testing"
	"time"

	"github.com/alicebob/miniredis/v2"
	"github.com/conduitio-labs/conduit-connector-redis/config"
	"github.com/conduitio/conduit-commons/opencdc"
	sdk "github.com/conduitio/conduit-connector-sdk"
	"go.uber.org/goleak"
)

const (
	key = "dummy_key"
)

func TestAcceptance(t *testing.T) {
	mr, err := miniredis.Run()
	if err != nil {
		t.Fatal(err)
	}
	defer mr.Close()
	sourceConf := map[string]string{
		config.KeyHost:          mr.Host(),
		config.KeyPort:          mr.Port(),
		config.KeyRedisKey:      key,
		config.KeyMode:          string(config.ModeStream),
		config.KeyPollingPeriod: time.Millisecond.String(),
	}
	destConf := map[string]string{
		config.KeyHost:     mr.Host(),
		config.KeyPort:     mr.Port(),
		config.KeyRedisKey: key,
		config.KeyMode:     string(config.ModeStream),
	}

	sdk.AcceptanceTest(t, AcceptanceTestDriver{
		ConfigurableAcceptanceTestDriver: sdk.ConfigurableAcceptanceTestDriver{
			Config: sdk.ConfigurableAcceptanceTestDriverConfig{
				Connector:         Connector,
				SourceConfig:      sourceConf,
				DestinationConfig: destConf,
				GoleakOptions:     []goleak.Option{goleak.IgnoreCurrent()},
				AfterTest: func(*testing.T) {
					mr.FlushAll()
				},
			},
		},
		rand: rand.New(rand.NewSource(time.Now().UnixNano())), //nolint:gosec // only used for testing purpose
	})
}

type AcceptanceTestDriver struct {
	rand *rand.Rand
	sdk.ConfigurableAcceptanceTestDriver
}

// GenerateRecord overrides the pre-defined generate record function to generate the records in required format.
func (d AcceptanceTestDriver) GenerateRecord(*testing.T, opencdc.Operation) opencdc.Record {
	return opencdc.Record{
		Operation: opencdc.OperationCreate,
		Metadata:  opencdc.Metadata{"key": key},
		Key:       opencdc.RawData(key),
		Payload: opencdc.Change{After: opencdc.RawData(
			fmt.Sprintf(`{"%s":"%s"}`, d.randString(32), d.randString(32)),
		)},
	}
}

// randString generates a random string of length n.
// (source: https://stackoverflow.com/a/31832326)
func (d AcceptanceTestDriver) randString(n int) string {
	const letterBytes = `0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz`
	const (
		letterIdxBits = 6                    // 6 bits to represent a letter index
		letterIdxMask = 1<<letterIdxBits - 1 // All 1-bits, as many as letterIdxBits
		letterIdxMax  = 63 / letterIdxBits   // # of letter indices fitting in 63 bits
	)
	sb := strings.Builder{}
	sb.Grow(n)
	// src.Int63() generates 63 random bits, enough for letterIdxMax characters
	for i, cache, remain := n-1, d.rand.Int63(), letterIdxMax; i >= 0; {
		if remain == 0 {
			cache, remain = d.rand.Int63(), letterIdxMax
		}
		if idx := int(cache & letterIdxMask); idx < len(letterBytes) {
			sb.WriteByte(letterBytes[idx])
			i--
		}
		cache >>= letterIdxBits
		remain--
	}
	return sb.String()
}