Apex Tests

@isTest
public class TestVerifyDate {
    // test when date2 is within 30 days of date1
    @isTest
    static void testDateWithin30Days() {
        Date date1 = Date.today();
        Date date2 = Date.today().addDays(10); // within 30 days

        Date result = VerifyDate.CheckDates(date1, date2);
        System.assertEquals(date2, result, 'Date2 is within 30 days of Date1 so it should be returned');
    }

    // test when date2 is not within 30 days of date1
    @isTest
    static void testDateNotWithin30Days() {
        Date date1 = Date.today();
        Date date2 = Date.today().addDays(35); // more than 30 days

        Date result = VerifyDate.CheckDates(date1, date2);

        Integer totalDays = Date.daysInMonth(date1.year(), date1.month());
        Date lastDayOfMonth = Date.newInstance(date1.year(), date1.month(), totalDays);

        System.assertEquals(lastDayOfMonth, result, 'Date2 is not within 30 days of Date1 so end of the month should be returned');
    }
    
    // test when date2 is before date1
    @isTest
    static void testDate2BeforeDate1() {
        Date date1 = Date.today();
        Date date2 = Date.today().addDays(-5); // before date1

        Date result = VerifyDate.CheckDates(date1, date2);

        Integer totalDays = Date.daysInMonth(date1.year(), date1.month());
        Date lastDayOfMonth = Date.newInstance(date1.year(), date1.month(), totalDays);

        System.assertEquals(lastDayOfMonth, result, 'Date2 is before Date1 so end of the month should be returned');
    }
}

                    

In this test class, we have three methods. The first method tests the condition where date2 is within 30 days of date1. The second method tests the condition where date2 is more than 30 days away from date1, and the third method tests the condition where date2 is before date1. The System.assertEquals method is used to assert that the actual result matches the expected result. After writing your tests, be sure to run them and check the code coverage in the Developer Console or your Salesforce IDE to make sure you have achieved 100% coverage.

//Create and install a simple Apex trigger which blocks inserts and updates to any contact with a last name of “INVALIDNAME”. 
//The trigger should add an error message to the contact record and prevent the record from being saved.

trigger RestrictContactByName on Contact (before insert, before update) {
	
	//check contacts prior to insert or update for invalid data
	For (Contact c : Trigger.New) {
		if(c.LastName == 'INVALIDNAME') {	//invalidname is invalid
			c.AddError('The Last Name "'+c.LastName+'" is not allowed for DML');
		}

	}

}
        

@isTest
public class TestRestrictContactByName {
    @isTest static void testInvalidName() {
        // Arrange
        Contact c = new Contact(LastName = 'INVALIDNAME', FirstName = 'Test');

        // Act
        Test.startTest();
        Database.SaveResult sr = Database.insert(c, false);
        Test.stopTest();

        // Assert
        System.assert(!sr.isSuccess(), 'Record should have failed to insert');
        System.assertEquals('The Last Name "INVALIDNAME" is not allowed for DML', sr.getErrors()[0].getMessage(), 'Error message should match');
    }
    
    @isTest static void testValidName() {
        // Arrange
        Contact c = new Contact(LastName = 'VALIDNAME', FirstName = 'Test');

        // Act
        Test.startTest();
        Database.SaveResult sr = Database.insert(c, false);
        Test.stopTest();

        // Assert
        System.assert(sr.isSuccess(), 'Record should have inserted successfully');
    }
}

        

//Create an Apex class that returns a list of contacts based on two incoming parameters:
//the number of contacts to generate and the last name for those contacts.
//Do not insert the contacts into the database.
//Create an Apex class in the public scope named RandomContactFactory without the @isTest annotation.
//Use a Public Static Method to consistently generate contacts with unique first names based on the iterated number in the format Test 1, Test 2, Test 3, etc.
//Method Name: generateRandomContacts without the @isTest annotation
//Parameter 1: Integer numContacts being the number of contacts to generate with unique first names
//Parameter 2: String lastName being the last name for those contacts
//Return Type: List

public class RandomContactFactory {
    public static List generateRandomContacts(Integer numContacts, String lastName) {
        List contacts = new List();
        for (Integer i = 1; i <= numContacts; i++) {
            Contact c = new Contact();
            c.FirstName = 'Test ' + i;
            c.LastName = lastName;
            contacts.add(c);
        }
        return contacts;
    }
}