### Question:
IndexEntry { public String toString() { StringBuilder buf = new StringBuilder(); buf.append( "IndexEntry[ " ); buf.append( tuple.getKey() ); buf.append( ", " ); buf.append( tuple.getValue() ); buf.append( " ]" ); return buf.toString(); } IndexEntry(); void setTuple( Tuple<K, I> tuple ); I getId(); K getKey(); void setId( I id ); void setKey( K value ); Entry getEntry(); void setEntry( Entry entry ); Tuple<K, I> getTuple(); void clear(); void copy( IndexEntry<K, I> entry ); int hashCode(); boolean equals( Object that ); String toString();  }### Answer:
@Test public void testToString() { indexEntry.setTuple( new Tuple<String, Long>( "asdfghjkl", 1234567890L ) ); assertTrue( indexEntry.toString().contains( "asdfghjkl" ) ); assertTrue( indexEntry.toString().contains( "1234567890" ) ); }