}
		if testCase.expect != string(token) {
			t.Errorf("%d: token did not match: %q %q", i, testCase.expect, string(token))
		}
	}
}

func TestGuessJSON(t *testing.T) {
	if r, _, isJSON := GuessJSONStream(bytes.NewReader([]byte(" \n{}")), 100); !isJSON {
		t.Fatalf("expected stream to be JSON")
	} else {
		b := make([]byte, 30)
		n, err := r.Read(b)