move FillWithTestdata from RAM method to function

driver.go

@@ -23,6 +23,33 @@ type Driver interface {
 	Set(context.Context, string, string, []byte) error
 }
 
+func FillWithTestdata(ctx context.Context, driver Driver) error {
+	d := "./testdata/slack_events"
+	entries, err := os.ReadDir(d)
+	if err != nil {
+		return err
+	}
+	for _, entry := range entries {
+		if entry.IsDir() {
+			continue
+		}
+		b, err := os.ReadFile(path.Join(d, entry.Name()))
+		if err != nil {
+			return err
+		}
+		m, err := ParseSlack(b)
+		if errors.Is(err, ErrIrrelevantMessage) {
+			continue
+		} else if err != nil {
+			return err
+		}
+		if err := driver.Set(nil, "m", m.ID, m.Serialize()); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
 type Postgres struct {
 	db *sql.DB
 }
@@ -162,33 +189,6 @@ func NewRAM() RAM {
 	}
 }
 
-func (ram RAM) Fill() error {
-	d := "./testdata/slack_events"
-	entries, err := os.ReadDir(d)
-	if err != nil {
-		return err
-	}
-	for _, entry := range entries {
-		if entry.IsDir() {
-			continue
-		}
-		b, err := os.ReadFile(path.Join(d, entry.Name()))
-		if err != nil {
-			return err
-		}
-		m, err := ParseSlack(b)
-		if errors.Is(err, ErrIrrelevantMessage) {
-			continue
-		} else if err != nil {
-			return err
-		}
-		if err := ram.Set(nil, "m", m.ID, m.Serialize()); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
 func (ram RAM) Close() error {
 	return nil
 }

driver_test.go

@@ -28,9 +28,12 @@ func TestDriverRAM(t *testing.T) {
 	testDriver(t, NewRAM())
 }
 
-func TestRAMFillTestdata(t *testing.T) {
+func TestFillTestdata(t *testing.T) {
+	ctx, can := context.WithTimeout(context.Background(), time.Second*15)
+	defer can()
+
 	ram := NewRAM()
-	if err := ram.Fill(); err != nil {
+	if err := FillWithTestdata(ctx, ram); err != nil {
 		t.Fatal(err)
 	}
 	n := 0