Lucene.Net.Search.AutomatonQuery.Equals C# (CSharp) Method

        public override bool Equals(object obj)
        {
            if (this == obj)
            {
                return true;
            }
            if (!base.Equals(obj))
            {
                return false;
            }
            if (this.GetType() != obj.GetType())
            {
                return false;
            }
            AutomatonQuery other = (AutomatonQuery)obj;
            if (!Compiled.Equals(other.Compiled))
            {
                return false;
            }
            if (Term == null)
            {
                if (other.Term != null)
                {
                    return false;
                }
            }
            else if (!Term.Equals(other.Term))
            {
                return false;
            }
            return true;
        }

        public virtual void TestEquals()
        {
            AutomatonQuery a1 = new AutomatonQuery(NewTerm("foobar"), BasicAutomata.MakeString("foobar"));
            // reference to a1
            AutomatonQuery a2 = a1;
            // same as a1 (accepts the same language, same term)
            AutomatonQuery a3 = new AutomatonQuery(NewTerm("foobar"), BasicOperations.Concatenate(BasicAutomata.MakeString("foo"), BasicAutomata.MakeString("bar")));
            // different than a1 (same term, but different language)
            AutomatonQuery a4 = new AutomatonQuery(NewTerm("foobar"), BasicAutomata.MakeString("different"));
            // different than a1 (different term, same language)
            AutomatonQuery a5 = new AutomatonQuery(NewTerm("blah"), BasicAutomata.MakeString("foobar"));

            Assert.AreEqual(a1.GetHashCode(), a2.GetHashCode());
            Assert.AreEqual(a1, a2);

            Assert.AreEqual(a1.GetHashCode(), a3.GetHashCode());
            Assert.AreEqual(a1, a3);

            // different class
            AutomatonQuery w1 = new WildcardQuery(NewTerm("foobar"));
            // different class
            AutomatonQuery w2 = new RegexpQuery(NewTerm("foobar"));

            Assert.IsFalse(a1.Equals(w1));
            Assert.IsFalse(a1.Equals(w2));
            Assert.IsFalse(w1.Equals(w2));
            Assert.IsFalse(a1.Equals(a4));
            Assert.IsFalse(a1.Equals(a5));
            Assert.IsFalse(a1.Equals(null));
        }