How to write test method for wrapper class?

Hello sushant,

you can do something like this

Apex Class:

public class EmployeeController {
public static void assignSequence(List<Employee__c> listEmployee, Decimal startNum) {
Decimal initial = startNum;
List<EmployeeWrapper> listEmployeeWrapper = new List<EmployeeWrapper>();

for(Employee__c emp : listEmployee) {
listEmployeeWrapper.add(new EmployeeWrapper(emp));
}

listEmployeeWrapper.sort();
listEmployee.clear();

for(EmployeeWrapper empW : listEmployeeWrapper) {
listEmployee.add(empW.dirPagination);
}

for(Employee__c emp : listEmployee) {
emp.Sequence_in_Section__c = initial;
initial = initial + 10;
}

update listEmployee;
}

public class EmployeeWrapper implements Comparable {

public Employee__c emp = new Employee__c();

// Constructor
public EmployeeWrapper(Employee__c empRecord) {
emp = empRecord;
}

// Compare emp based on the Employee__c Age__c.
public Integer compareTo(Object compareTo) {
// Cast argument to EmployeeWrapper
EmployeeWrapper compareToEmp = (EmployeeWrapper)compareTo;

// The return value of 0 indicates that both elements are equal.
Integer returnValue = 0;
if (emp.Age__c > compareToEmp.emp.Age__c) {
// Set return value to a positive value.
returnValue = 1;
} else if (emp.Directory_Heading__c < compareToEmp.emp.Age__c) {
// Set return value to a negative value.
returnValue = -1;
}

return returnValue;
}
}
}

Test Class:

private class EmployeeControllerTest {
static testMethod void empTest() {
Employee__c emp = new Employee__c(Name = 'Test', Age__c = 12);
EmployeeController.EmployeeWrapper empW = new EmployeeController.EmployeeWrapper(emp); //Covering inner/wrapper class
empW.compareTo(empW);
//Covering compareTo()
}
}

Hope it may help