### Question:
TagDefinition implements Serializable { @Override public String toString() { ToStringBuilder retVal = new ToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE); retVal.append("id", myId); retVal.append("system", mySystem); retVal.append("code", myCode); retVal.append("display", myDisplay); return retVal.build(); } TagDefinition();  TagDefinition(TagTypeEnum theTagType, String theSystem, String theCode, String theDisplay); String getCode(); String getDisplay(); Long getId(); String getSystem(); TagTypeEnum getTagType(); void setCode(String theCode); void setDisplay(String theDisplay); void setSystem(String theSystem); void setTagType(TagTypeEnum theTagType); @Override boolean equals(Object obj); @Override int hashCode(); @Override String toString();  }### Answer:
@Test public void testToString() { TagDefinition def = new TagDefinition(); def.setCode("my_code"); def.setSystem("my_system"); def.setDisplay("my_display"); assertEquals("TagDefinition[id=<null>,system=my_system,code=my_code,display=my_display]", def.toString()); }