### Question:
Tag implements Serializable { @Override public String toString() { StringBuilder stringBuilder = new StringBuilder(); stringBuilder.append("key="); stringBuilder.append(this.key); stringBuilder.append(", value="); stringBuilder.append(this.value); return stringBuilder.toString(); } Tag(String tag);  Tag(String key, String value); private  Tag(String tag, int splitPosition); @Override boolean equals(Object obj); @Override int hashCode(); @Override String toString(); final String key; final String value; }### Answer:
@Test public void toStringTest() { Tag tag = new Tag(KEY, VALUE); Assert.assertEquals(TAG_TO_STRING, tag.toString()); }