public void CanReturnNullStringIfRightTableNotContainsKey()
{
// ARRANGE
// Instantiate first hash table
Hashtable ht1 = new Hashtable(1024);
// Add key:value pairs to first HT
ht1.Add("fond", "enamored");
ht1.Add("wrath", "anger");
ht1.Add("diligent", "employed");
ht1.Add("outfit", "garb");
ht1.Add("guide", "usher");
// Instantiate second hash table
Hashtable ht2 = new Hashtable(1024);
// Add other key:value pairs to second HT
ht2.Add("fond", "averse");
ht2.Add("wrath", "delight");
ht2.Add("diligent", "idle");
ht2.Add("guide", "follow");
ht2.Add("flow", "jam");
// ACT
// Capture list of arrays returned by LeftJoin method
List <string[]> leftJoin = Program.LeftJoin(ht1, ht2);
string[] array = leftJoin[1];
string rightTableValue = (string)array.GetValue(2);
// ASSERT
Assert.Contains("NULL", rightTableValue);
}
public void CanReturnEmptyListIfBothTablesEmpty()
{
// ARRANGE
Hashtable ht1 = new Hashtable(1024);
Hashtable ht2 = new Hashtable(1024);
// ACT
List <string[]> leftJoin = Program.LeftJoin(ht1, ht2);
// ASSERT
Assert.Empty(leftJoin);
}