I am trying to write a test method that calls a method in my class to get some configuration data. The method in my class returns a Map. From my test method, when I call the method in my class, I get an error which happens when I call APIService.getSystemSettings();

System.NullPointerException: Attempt to de-reference a null object

My code is below:

  private class APIServiceTest {

    @isTest static void APITest() {
      Map<String,String> envSettings = new Map<String,String>();
      envSettings = APIService.getSystemSettings();


Here is the class which contains the method I am calling:

public class APIService {

  static API_Settings__c apiSettings = API_Settings__c.getValues('apisettings')        
  static Map<String,String> envSettings = new Map<String,String>();

  public static Map<String,String> getSystemSettings() {
   envSettings.put('customerURL', apiSettings.customer_url__c);


Most of my methods in APIService are methods annotateded with @Future(Callout=true) so that is why most of the variables are declared as static methods.

I am trying to determine why I am getting this error and what is needed to fix it.

  • is it hierarchical custom setting or list custom setting? – Pranay Jaiswal Jun 10 '19 at 20:17
  • It is list custom setting @PranayJaiswal – user1669296 Jun 10 '19 at 20:24
  • You have to insert the custom settings in testContext in testSetup. See David's answer. – Pranay Jaiswal Jun 10 '19 at 20:25

In unit test context, Custom Settings are treated as data (not metadata), and hence are not visible due to test isolation.

Your unit test's setup, whether in your @isTest or an @testSetup method, must construct and insert any Custom Settings records you wish to have available to your test code.

You get a NullPointerException because there is no visible API_Settings__c instance called apisettings; it's null.

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