So I have a method that takes as a parameter an Id of a object and uses it to make an external callout. Unfortunately I can't seem to figure out any way to test it.

@isTest static void sometimes_salesforces_sucks() {
   My_Object__c foo = new My_Object__c(Name='test');
   insert foo;
   MyClient client = new MyClient();
   MyMockResponseGenerator mockResponse = new MyMockResponseGenerator();
   Test.setMock(HttpCalloutMock.class,mockResponse);
   
   Test.startTest();
   client.bar(foo.Id);
   Test.stopTest();
}

This question says that using start/stop test should work, but it doesn't work for me

So I have a method that takes as a parameter an Id of a object and uses it to make an external callout. Unfortunately I can't seem to figure out any way to test it.

@isTest static void sometimes_salesforces_sucks() {
   My_Object__c foo = new My_Object__c(Name='test');
   insert foo;
   MyClient client = new MyClient();
   MyMockResponseGenerator mockResponse = new MyMockResponseGenerator();
   Test.setMock(HttpCalloutMock.class,mockResponse);
   
   Test.startTest();
   client.bar(foo.Id);
   Test.stopTest();
}

This question says that using start/stop test should work, but it doesn't work for me