class ReadBytesWireFormat {

        @ParameterizedTest
        @ValueSource(ints = { 0, 1, 5, 10 })
        @DisplayName("Reads structure size 4 and returns 4 for various start indexes")
        void returnsFour_whenStructureSizeIsFour(int start) throws Exception {
            // Arrange: build a buffer that has the little-endian value 4 at 'start'
            int len = start + 2; // need at least two bytes from start