Added donor add test for address needed error

ref #65

src/tests/donors/donor_add.spec.ts

@@ -60,6 +60,16 @@ describe('POST /api/donors with errors', () => {
         expect(res2.status).toEqual(400);
         expect(res2.headers['content-type']).toContain("application/json")
     });
+    it('creating a new donor without an address but with receiptNeeded=true 406', async () => {
+        const res2 = await axios.post(base + '/api/donors', {
+            "firstname": "string",
+            "middlename": "string",
+            "lastname": "string",
+            "receiptNeeded": true
+        }, axios_config);
+        expect(res2.status).toEqual(406);
+        expect(res2.headers['content-type']).toContain("application/json")
+    });
 });
 // ---------------
 describe('POST /api/donors working', () => {