public void TestJoinWhenThrowingExeptions()
{
List <Employee> employees = null;
var departmentList = new List <Department>
{
new Department {
DepartmentID = 1, Name = "HR"
},
new Department {
DepartmentID = 2, Name = "Marketing"
},
new Department {
DepartmentID = 4, Name = "Sales"
}
};
Func <Employee, int> outerFunc = (employee) => employee.ID;
Func <Department, int> innerFunc = (department) => department.DepartmentID;
Func <Employee, Department, KeyValuePair <string, string> > selector = (employee, department) =>
{
{
return(new KeyValuePair <string, string>(employee.FirstName, department.Name));
}
};
var result = LINQFunctions.Join(employees, departmentList,
employee => outerFunc(employee), department => innerFunc(department),
(employee, department) =>
selector(employee, department));
Assert.Throws <ArgumentNullException>(() => result.Count());
}
