test: M-03 添加边界测试

- 添加大量数据边界测试（100条记录）
- 添加特殊字符 PackID 边界测试
- 添加空字段验证边界测试

internal/store/sqlite/packs_repo_test.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"database/sql"
 	"errors"
+	"fmt"
 	"strings"
 	"testing"
 )
@@ -337,3 +338,110 @@ func TestPacksRepoListAll(t *testing.T) {
 		t.Fatalf("ListAll() ids = [%q %q], want [pack-a pack-b]", packs[0].PackID, packs[1].PackID)
 	}
 }
+
+// 边界测试：大量数据
+func TestPacksRepoListAll_Boundary_LargeDataset(t *testing.T) {
+	store := openTestDB(t)
+	ctx := context.Background()
+
+	const count = 100
+	for i := 0; i < count; i++ {
+		pack := Pack{
+			PackID:   fmt.Sprintf("pack-%d", i),
+			Version:  "1.0.0",
+			Checksum: fmt.Sprintf("checksum-%d", i),
+		}
+		if _, err := store.Packs().Create(ctx, pack); err != nil {
+			t.Fatalf("Create(pack-%d) error = %v", i, err)
+		}
+	}
+
+	packs, err := store.Packs().ListAll(ctx)
+	if err != nil {
+		t.Fatalf("ListAll() error = %v", err)
+	}
+	if len(packs) != count {
+		t.Fatalf("ListAll() len = %d, want %d", len(packs), count)
+	}
+}
+
+// 边界测试：特殊字符 PackID
+func TestPacksRepoUpsert_Boundary_SpecialChars(t *testing.T) {
+	store := openTestDB(t)
+	ctx := context.Background()
+
+	specialIDs := []string{
+		"pack-with-dash",
+		"pack_with_underscore",
+		"pack.with.dot",
+		"pack:with:colon",
+		"pack123numeric",
+		"UPPERCASE",
+		"mixedCase123",
+	}
+
+	for _, id := range specialIDs {
+		pack := Pack{
+			PackID:   id,
+			Version:  "1.0.0",
+			Checksum: "checksum",
+		}
+		_, err := store.Packs().Upsert(ctx, pack)
+		if err != nil {
+			t.Errorf("Upsert(%q) error = %v", id, err)
+			continue
+		}
+		// Verify by reading back
+		got, err := store.Packs().GetByPackID(ctx, id)
+		if err != nil {
+			t.Errorf("GetByPackID(%q) after Upsert error = %v", id, err)
+			continue
+		}
+		if got.PackID != id {
+			t.Errorf("Upsert(%q) stored PackID = %q", id, got.PackID)
+		}
+	}
+}
+
+// 边界测试：空字符串字段
+func TestPacksRepoCreate_Boundary_EmptyFields(t *testing.T) {
+	store := openTestDB(t)
+	ctx := context.Background()
+
+	testCases := []struct {
+		name    string
+		pack    Pack
+		wantErr bool
+	}{
+		{
+			name: "empty version",
+			pack: Pack{
+				PackID:   "pack-empty-version",
+				Version:  "",
+				Checksum: "checksum",
+			},
+			wantErr: true, // 空版本不被允许
+		},
+		{
+			name: "empty checksum",
+			pack: Pack{
+				PackID:   "pack-empty-checksum",
+				Version:  "1.0.0",
+				Checksum: "",
+			},
+			wantErr: true, // 空校验和不被允许
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			_, err := store.Packs().Create(ctx, tc.pack)
+			if tc.wantErr && err == nil {
+				t.Errorf("Create() expected error, got nil")
+			}
+			if !tc.wantErr && err != nil {
+				t.Errorf("Create() unexpected error = %v", err)
+			}
+		})
+	}
+}