### Question:
BaseHeader implements ISOHeader, Loggeable { public int getLength () { return header != null ? header.length : 0; } BaseHeader();  BaseHeader(byte[] header); Object clone(); byte[] pack(); int unpack(byte[] header); int getLength(); void setDestination(String dst); void setSource(String src); String getDestination(); String getSource(); void swapDirection(); void dump(PrintStream p, String indent); void setAsciiEncoding(boolean asciiEncoding); boolean isAsciiEncoding();  }### Answer:
@Test public void testGetLength() throws Throwable { byte[] header = new byte[3]; int result = new BaseHeader(header).getLength(); assertEquals(3, result, "result"); }