add bitcoin shop config and payment method enablement

backend/src/validation/decorators/isEnabledPaymentMethods.spec.ts

@@ -0,0 +1,35 @@
+import { validateSync } from 'class-validator';
+import { IsEnabledPaymentMethods } from './isEnabledPaymentMethods';
+
+class TestDto {
+    @IsEnabledPaymentMethods()
+    PAYMENT_METHODS_ENABLED: string;
+}
+
+const validateMethods = (value: string) => {
+    const dto = Object.assign(new TestDto(), { PAYMENT_METHODS_ENABLED: value });
+
+    return validateSync(dto);
+};
+
+describe('IsEnabledPaymentMethods', () => {
+    it('accepts xmr only', () => {
+        expect(validateMethods('xmr')).toHaveLength(0);
+    });
+
+    it('accepts xmr and btc', () => {
+        expect(validateMethods('xmr,btc')).toHaveLength(0);
+    });
+
+    it('rejects empty string', () => {
+        expect(validateMethods('').length).toBeGreaterThan(0);
+    });
+
+    it('rejects unsupported methods', () => {
+        expect(validateMethods('eth').length).toBeGreaterThan(0);
+    });
+
+    it('rejects duplicate methods', () => {
+        expect(validateMethods('xmr,xmr').length).toBeGreaterThan(0);
+    });
+});