### Question:
ISOFieldPackager { public void setLength(int len) { this.len = len; } ISOFieldPackager();  ISOFieldPackager(int len, String description); String getDescription(); void setDescription(String description); int getLength(); void setLength(int len); void setPad(boolean pad); void setTrim(boolean trim); abstract int getMaxPackedLength(); ISOComponent createComponent(int fieldNumber); abstract byte[] pack(ISOComponent c); abstract int unpack(ISOComponent c, byte[] b, int offset); void unpack(ISOComponent c, InputStream in); void pack(ISOComponent c, ObjectOutput out);  }### Answer:
@Test public void testSetLength() throws Throwable { ISOFieldPackager iFB_AMOUNT = new IFB_AMOUNT(); iFB_AMOUNT.setLength(100); assertEquals(100, iFB_AMOUNT.getLength(), "(IFB_AMOUNT) iFB_AMOUNT.getLength()"); }