@Test
public void testFilter4() throws Throwable {
ISOMsg m = new ISOMsg(100);
byte[] value = new byte[2];
m.set(100, value);
m.merge(new ISOMsg("testMacroFilterMti"));
m.set(100, "");
ISOMsg result = new MacroFilter().filter(new CSChannel(new ISOBaseValidatingPackager()), m, new LogEvent(
"testMacroFilterTag", ""));
assertSame("result", m, result);
}