public void Equals()
{
CreateDataColumns(
out DataColumn customerIdCol,
out DataColumn orderIdCol);
var relation1 = new DataRelation("CustomersOrders", customerIdCol, orderIdCol);
var relation2 = new DataRelation("CustomersOrders", customerIdCol, orderIdCol);
var relation3 = new DataRelation("CustomersOrders", orderIdCol, customerIdCol);
Assert.AreEqual(relation1, relation1);
Assert.AreNotEqual(relation1, relation2);
Assert.AreNotEqual(relation2, relation1);
Assert.IsFalse(relation1.Equals(relation2));
Assert.IsFalse(relation2.Equals(relation1));
Assert.AreNotEqual(relation1, relation3);
Assert.AreNotEqual(relation3, relation1);
Assert.IsFalse(relation1.Equals(relation3));
Assert.IsFalse(relation3.Equals(relation1));
Assert.AreNotEqual(relation1, null);
Assert.IsFalse(relation1.Equals(null));
#region Local function
void CreateDataColumns(out DataColumn custIdCol, out DataColumn ordIdCol)
{
var dataSet = new DataSet();
var customers = new DataTable("Customers");
custIdCol = new DataColumn("CustomerID", typeof(int))
{
Unique = true
};
customers.Columns.Add(custIdCol);
dataSet.Tables.Add(customers);
var orders = new DataTable("Orders");
ordIdCol = new DataColumn("OrderID", typeof(int))
{
Unique = true
};
orders.Columns.Add(ordIdCol);
dataSet.Tables.Add(orders);
}
#endregion
}