chore: 并入 iotlcm-app 历史到 app/（原提交 f40bda9）

app/server/internal/library/batchimport/batch_no_test.go

@@ -0,0 +1,45 @@
+package batchimport
+
+import (
+	"strings"
+	"testing"
+	"time"
+)
+
+func TestNormalizeBatchNoPrefix(t *testing.T) {
+	prefix, err := normalizeBatchNoPrefix(" inb ")
+	if err != nil {
+		t.Fatalf("normalize prefix: %v", err)
+	}
+	if prefix != "INB" {
+		t.Fatalf("unexpected prefix: %s", prefix)
+	}
+
+	if _, err = normalizeBatchNoPrefix("IN"); err == nil {
+		t.Fatal("expected error for non-three-character prefix")
+	}
+}
+
+func TestFormatBatchNo(t *testing.T) {
+	now := time.Date(2026, 8, 10, 12, 34, 56, 789000000, time.Local)
+	batchNo, err := formatBatchNo("REN", now, 7)
+	if err != nil {
+		t.Fatalf("format batch no: %v", err)
+	}
+	if batchNo != "REN20260810123456007" {
+		t.Fatalf("unexpected batch no: %s", batchNo)
+	}
+	if len(batchNo) != 20 {
+		t.Fatalf("unexpected batch no length: %d", len(batchNo))
+	}
+	if strings.Contains(batchNo, "789") {
+		t.Fatalf("batch no should not include milliseconds: %s", batchNo)
+	}
+}
+
+func TestFormatBatchNoRejectsOverflowSequence(t *testing.T) {
+	_, err := formatBatchNo("REN", time.Now(), 1000)
+	if err == nil {
+		t.Fatal("expected overflow sequence error")
+	}
+}