feat(MED-161): add jest for service tests

__mocks__/isikukood.ts

@@ -0,0 +1,44 @@
+// Mock for isikukood library to avoid ES module issues in tests
+
+export enum Gender {
+  MALE = 'male',
+  FEMALE = 'female',
+}
+
+export default class Isikukood {
+  private code: string;
+
+  constructor(code: string) {
+    this.code = code;
+  }
+
+  static validate(code: string): boolean {
+    return true; // Mock always returns true for tests
+  }
+
+  static generate(options?: { gender?: Gender; century?: number }): string {
+    return '39001010002'; // Mock Estonian ID code
+  }
+
+  isValid(): boolean {
+    return true;
+  }
+
+  getGender(): Gender {
+    return Gender.MALE;
+  }
+
+  getBirthDate(): Date {
+    return new Date('1990-01-01');
+  }
+
+  getAge(): number {
+    return 30;
+  }
+
+  getCentury(): number {
+    return 3;
+  }
+}
+
+export { Isikukood };

__mocks__/server-only.ts

@@ -0,0 +1,3 @@
+// Mock for server-only to avoid Next.js server component issues in tests
+// This module does nothing in tests - it's just a marker for Next.js
+export {};