Hey guys,

I have been reading through many posts about scheduled apex test class, but they all just show the basic Test Class which is written in the docs. My problem ist that I only have 20% code coverage(5/24). This is my current test:

@istest
class TestLeadToBoerse {

   static testmethod void test() {
   Test.startTest();

      Lead l = new Lead();
      l.FirstName = 'Test';
      l.LastName = 'Tester';
      l.Phone = '05112323';
      l.City = ' Hannover';
      l.Street = 'Karl Str. 23';
      l.Email = 'karlotto@webmail.com';
      l.Company = 'Test';
      insert l;

      // Schedule the test job

      String jobId = System.schedule('testBasicScheduledApex',
      '0 0 0 3 9 ? 2022', 
         new leadToBoerseAfter24H());

      // Get the information from the CronTrigger API object
      CronTrigger ct = [SELECT Id, CronExpression, TimesTriggered, 
         NextFireTime
         FROM CronTrigger WHERE id = :jobId];

      // Verify the expressions are the same
      System.assertEquals('0 0 0 3 9 ? 2022', 
         ct.CronExpression);

      // Verify the job has not run
      System.assertEquals(0, ct.TimesTriggered);

      // Verify the next time the job will run
      System.assertEquals('2022-09-03 00:00:00', 
         String.valueOf(ct.NextFireTime));
      System.assertNotEquals('testScheduledApexFromTestMethodUpdated',
         [SELECT id, FirstName FROM Lead WHERE id = :l.id].FirstName);

   Test.stopTest();
   }
}

And this is my current Code: 

global class leadToBoerseAfter24H implements Schedulable{
 
 // Execute method
    global void execute(SchedulableContext SC) {
        // Code to be executed when the schedule class wakes up
        for(List<Lead> leads:[SELECT FirstName, LastName, Phone, MobilePhone, PostalCode, City, Street, Email, CreatedDate FROM Lead WHERE CreatedDate < YESTERDAY AND CreatedDate > 2015-04-06T01:02:03Z AND Email != null AND Status = 'Offen' AND (Lead_Status__c = null OR Lead_Status__c = 'Telefonisch nicht erreicht') AND (LeadSource = 'FWS Lead' OR LeadSource = 'AdressButler' OR LeadSource = 'WH Landingpage')]){
             List<lb_Leads__c> nL = new List<lb_Leads__c>();
            for(Lead l : leads){
               lb_Leads__c newL = new lb_Leads__c();
               newL.Vorname__c = l.FirstName;
               newL.Nachname__c = l.LastName;
               newL.Telefon__c = l.Phone;
               newL.Erstellt_datum__c = date.today();
               newL.Auktionsstart__c = date.today();
               newL.Anfangspreis__c = 120;
               newL.Status__c = 'active';
               newL.Stadt__c = l.City;
               if(l.PostalCode != null)
                   newL.PLZ__c = l.PostalCode;
               else
                   newL.PLZ__c = 'Keine Angabe';
               newL.Stra_e__c = l.Street;
               newL.Email__c = l.Email;
               newL.Mobiltelefon__c = l.MobilePhone;
               newL.Beschreibung__c = 'Pflegeimmobilie als Kapitalanlage';
               nL.add(newL);
            }
            if(!nL.isEmpty()){
                insert nL;
                delete leads;
            }
        }
   }
 }

I would be so, so grateful for any help I can get. 

Best regards!