}
	expectedMap.Set("Vary", "Origin")

	req, _ := http.NewRequest(http.MethodOptions, s.endPoint, nil)
	req.Header.Set("Origin", "http://foobar.com")
	res, err := s.client.Do(req)
	if err != nil {
		c.Fatal(err)
	}

	for k := range expectedMap {
		if v, ok := res.Header[k]; !ok {
			c.Errorf("Expected key %s missing from %v", k, res.Header)
		} else {
			expectedSet := set.CreateStringSet(expectedMap[k]...)

		}
		if testCase.expectedRespStatus != http.StatusOK {
			b, err := io.ReadAll(rec.Body)
			if err != nil {
				t.Fatal(err)
			}
			var apiErr APIErrorResponse
			err = xml.Unmarshal(b, &apiErr)
			if err != nil {
				t.Fatal(err)
			}
			gotErr := apiErr.Code
			wantErr := testCase.wantAPICode
			if gotErr != wantErr {