// trailers afterwards.
		wantLen = len(body)
		wantHeader["Content-Length"] = []string{fmt.Sprint(wantLen)}
	}
	if res.ContentLength != int64(wantLen) {
		t.Errorf("ContentLength = %v; want %v", res.ContentLength, wantLen)
	}

	delete(res.Header, "Date") // irrelevant for test
	if !reflect.DeepEqual(res.Header, wantHeader) {
		t.Errorf("Header = %v; want %v", res.Header, wantHeader)
	}

	if got, want := res.Trailer, (Header{

		if err == nil {
			if tt.err != "" {
				t.Errorf("#%d: got nil err; want %q", i, tt.err)
			}

			if !reflect.DeepEqual(tt.header, req.Header) {
				t.Errorf("#%d: gotHeader: %q wantHeader: %q", i, req.Header, tt.header)
			}
			continue
		}

		if tt.err == "" || !strings.Contains(err.Error(), tt.err) {
			t.Errorf("%d: got error = %v; want %v", i, err, tt.err)
		}
	}
}

		wantCode    int
		wantHeaders http.Header
	}
	newTest := func() test {
		return test{
			name:      "compress on gzip",
			out:       largePayload,
			mediaType: "application/json",
			req: &http.Request{
				Header: http.Header{
					"Accept-Encoding": []string{"gzip"},
				},
				URL: &url.URL{Path: "/path"},
			},
			wantCode: http.StatusOK,
			wantHeaders: http.Header{

		err = crane.Push(img, ref)
		if err != nil {
			t.Fatal(err)
		}

		// Retrieve the wanted image content.
		wantReader, err := wasmLayer.Compressed()
		if err != nil {
			t.Fatal(err)
		}
		defer wantReader.Close()

		want, err := io.ReadAll(wantReader)
		if err != nil {
			t.Fatal(err)
		}

		// Fetch OCI image with digest
		d, err := img.Digest()
		if err != nil {

	if err != nil {
		return SpeedTestResult{}, err
	}
	defer xhttp.DrainBody(respBody)
	waitReader, err := waitForHTTPResponse(respBody)
	if err != nil {
		return SpeedTestResult{}, err
	}

	var result SpeedTestResult
	err = gob.NewDecoder(waitReader).Decode(&result)
	if err != nil {
		return result, err
	}
	if result.Error != "" {
		return result, errors.New(result.Error)

			gotErr := apiErr.Code
			wantErr := testCase.wantAPICode
			if gotErr != wantErr {
				t.Errorf("test %d: want api error %q, got %q", i, wantErr, gotErr)
			}
			if testCase.wantHeaders != nil {
				for k, v := range testCase.wantHeaders {
					got := rec.Header().Get(k)
					if got != v {
						t.Errorf("Want header %s = %s, got %#v", k, v, rec.Header())
					}
				}
			}

		}