feat: 添加批量生成CDK功能

modules/config/service/cdk_test.go

@@ -0,0 +1,76 @@
+package service
+
+import (
+	"errors"
+	"testing"
+)
+
+func TestGenerate16CharSecure(t *testing.T) {
+	for i := 0; i < 100; i++ {
+		code := Generate16CharSecure()
+		if len(code) != cdkCodeLength {
+			t.Fatalf("expected code length %d, got %d", cdkCodeLength, len(code))
+		}
+
+		for _, ch := range code {
+			if !containsRune(charsetWithSymbol, ch) {
+				t.Fatalf("unexpected character %q in code %q", ch, code)
+			}
+		}
+	}
+}
+
+func TestBuildUniqueCodesSkipsDuplicatesAndExisting(t *testing.T) {
+	sequence := []string{
+		"DUPLICATE-000001",
+		"DUPLICATE-000001",
+		"EXISTING-000001",
+		"VALID-000000001",
+		"VALID-000000002",
+		"VALID-000000003",
+		"VALID-000000004",
+		"VALID-000000005",
+		"VALID-000000006",
+	}
+	index := 0
+
+	codes, err := buildUniqueCodes(3, func() (string, error) {
+		if index >= len(sequence) {
+			return "", errors.New("generator exhausted")
+		}
+		code := sequence[index]
+		index++
+		return code, nil
+	}, func(candidates []string) (map[string]struct{}, error) {
+		return map[string]struct{}{
+			"EXISTING-000001": {},
+		}, nil
+	})
+	if err != nil {
+		t.Fatalf("buildUniqueCodes returned error: %v", err)
+	}
+
+	if len(codes) != 3 {
+		t.Fatalf("expected 3 codes, got %d", len(codes))
+	}
+
+	want := []string{
+		"VALID-000000001",
+		"VALID-000000002",
+		"VALID-000000003",
+	}
+	for i, code := range want {
+		if codes[i] != code {
+			t.Fatalf("expected code %q at index %d, got %q", code, i, codes[i])
+		}
+	}
+}
+
+func containsRune(value string, target rune) bool {
+	for _, ch := range value {
+		if ch == target {
+			return true
+		}
+	}
+	return false
+}