System.Data.Tests.UniqueConstraintTest.EqualsAndHashCode C# (CSharp) Метод

        public void EqualsAndHashCode()
        {
            UniqueConstraint cst = new UniqueConstraint(new DataColumn[] {
                    _table.Columns[0], _table.Columns[1]});
            UniqueConstraint cst2 = new UniqueConstraint(new DataColumn[] {
                     _table.Columns[1], _table.Columns[0]});

            UniqueConstraint cst3 = new UniqueConstraint(_table.Columns[0]);
            UniqueConstraint cst4 = new UniqueConstraint(_table.Columns[2]);

            //true
            Assert.True(cst.Equals(cst2));

            //false
            Assert.False(cst.Equals(23));
            Assert.False(cst.Equals(cst3));
            Assert.False(cst3.Equals(cst));
            Assert.False(cst.Equals(cst4));

            Assert.NotEqual(cst3.GetHashCode(), cst.GetHashCode());
        }