[fix] cleanup test data

dal/__test__/srv/main.go

@@ -3,6 +3,10 @@ package main
 import (
 	"fmt"
 	"net/http"
+	"os"
+	"os/signal"
+	"sync"
+	"syscall"
 
 	_ "github.com/mattn/go-sqlite3"
 	"l12.xyz/dal/adapter"
@@ -20,6 +24,13 @@ func mock(adapter adapter.DBAdapter) {
 }
 
 func main() {
+	defer os.Remove("test.sqlite")
+	c := make(chan os.Signal)
+	signal.Notify(c, os.Interrupt, syscall.SIGTERM)
+	go func() {
+		<-c
+		os.Remove("test.sqlite")
+	}()
 	db := adapter.DBAdapter{
 		Type: "sqlite3",
 	}
@@ -29,4 +40,7 @@ func main() {
 	mux.Handle("/", queryHandler)
 	fmt.Println("Server running on port 8111")
 	http.ListenAndServe(":8111", mux)
+	wg := sync.WaitGroup{}
+	wg.Add(1)
+	wg.Wait()
 }