added integration test for cleanup cron

internal/tests/integration/cleanup-cron/cleanup_cron_test.go

@@ -0,0 +1,93 @@
+package cleanup_cron
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"server/config"
+	"server/internal/db"
+	"server/internal/server"
+	"server/internal/server/utils"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+
+	setup_test "server/internal/tests/integration/setup"
+)
+
+// getDiceDBClient initializes the DiceDB client using the container's exposed port
+func getDiceDBClient(container *setup_test.DiceDBContainer, config *config.Config, isAdmin bool) (*db.DiceDB, error) {
+	// Get the container's host and port
+	host, err := container.Container.Host(context.Background())
+	if err != nil {
+		return nil, fmt.Errorf("failed to get host: %v", err)
+	}
+
+	port, err := container.Container.MappedPort(context.Background(), "7379/tcp")
+	if err != nil {
+		return nil, fmt.Errorf("failed to get mapped port: %v", err)
+	}
+
+	address := net.JoinHostPort(host, port.Port())
+	// the port is dynamically assigned so that's why
+	// changing addr of diceDb and diceDbAdmin
+	if isAdmin == true {
+		config.DiceDBAdmin.Addr = address
+	} else {
+		config.DiceDB.Addr = address
+	}
+
+	client, err := db.InitDiceClient(config, isAdmin)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create DiceDB client: %v", err)
+	}
+
+	return client, nil
+}
+
+func TestStartCleanupCronWithDiceDB(t *testing.T) {
+	ctx := context.Background()
+
+	configValue := config.LoadConfig()
+
+	diceDbContainer, err := setup_test.InitializeDiceDBContainer(ctx)
+	assert.NoError(t, err, "should initialize  DiceDB container")
+	defer diceDbContainer.Cleanup(ctx)
+
+	diceDbAdminContainer, err := setup_test.InitializeDiceDBContainer(ctx)
+	assert.NoError(t, err, "should initialize Admin DiceDB container")
+	defer diceDbAdminContainer.Cleanup(ctx)
+
+	// Get userDemoClient and sysDiceClient from the running container
+	diceDb, err := getDiceDBClient(diceDbContainer, configValue, false)
+	assert.NoError(t, err, "should create DiceDB client")
+
+	diceDbAdmin, err := getDiceDBClient(diceDbAdminContainer, configValue, true)
+	assert.NoError(t, err, "should create Admin DiceDB client")
+
+	// Add a sample key to test cleanup
+	sampleValueResp := diceDb.Client.Set(ctx, "sample", "dummy", -1)
+	assert.NoError(t, sampleValueResp.Err(), "should set sample key in DiceDB")
+
+	wg := sync.WaitGroup{}
+	// Register a cleanup manager, this runs user DiceDB instance cleanup job at configured frequency
+	// setting a frequency for a second so that I can easily test it.
+	cleanupManager := server.NewCleanupManager(diceDbAdmin, diceDb, time.Second)
+	wg.Add(1)
+	go cleanupManager.Run(ctx, &wg)
+
+	time.Sleep(2 * time.Second)
+
+	// Check if any keys are still present in diceDb (should be cleaned up)
+	response := diceDb.Client.Keys(ctx, "*")
+	assert.NoError(t, response.Err(), "should execute Keys command on DiceDB")
+	assert.Equal(t, response.Val(), []string{}, "should have cleaned up keys in diceDb")
+
+	// Retrieve the last cleanup time from diceDbAdmin
+	cleanupTimeResp := diceDbAdmin.Client.Get(ctx, utils.LastCronCleanupTimeUnixMs)
+	assert.NoError(t, cleanupTimeResp.Err(), "should execute GET command on adminDiceDb")
+	assert.NotEmpty(t, cleanupTimeResp.Val(), "should have set playground_mono:last_cron_cleanup_run_time_unix_ms in diceDbAdmin")
+
+}