add option request unit test

Author: FinalDes

test/server.test.ts

@@ -14,4 +14,17 @@ describe("server test", () => {
         done();
       });
   });
+  it("check option request", (done: jest.DoneCallback) => {
+    request(app)
+      .options("/graphql")
+      .expect(204)
+      .end((err, res: request.Response) => {
+        expect(err).toBeNull();
+        expect(res.header["access-control-allow-methods"]).toBe("POST");
+        // console.log(err);
+        console.log(res);
+        done();
+      });
+
+  });
 });