Apex Unit Test Gists

BasicUnitTest.cls

@isTest
public with sharing class WarehouseUnitTests {
  
	
	public WarehouseUnitTests() {}
	
	@isTest
	static public void testRequiredFields() {	

		//assertion: Merchandise requires Price and Quantity
  
  }
}

Basleline Data Method.cls

  static public Boolean createBaselineData() {
		Merchandise__c m = new Merchandise__c(Name='Rack Server',Price__c=1245.99,Quantity__c=500);
		insert m;
		
		Invoice__c i = new Invoice__c();
		insert i;
		
		Line_Item__c li = new Line_Item__c(Name='1',Quantity__c=10,Merchandise__c=m.Id,Invoice__c=i.Id);
		insert li;
		
		return true;	
	}

CheckRequiredFields.cls

System.debug('REQUIRED FIELDS:');
  	//Detect all the required fields and debug out the result.  This will help if a required field is added in the future.
		Map<String, Schema.SObjectField> describeFields = Schema.SObjectType.Merchandise__c.fields.getMap();
		Map<String, Schema.DisplayType> fieldsTypes = new Map<String, Schema.DisplayType>();
		for(String field : describeFields.keyset()){
		    Schema.DescribeFieldResult dr = describeFields.get(field).getDescribe();
		    if(dr.isCreateable() && !dr.isNillable() && !dr.isDefaultedOnCreate()) {
				System.debug('REQUIRED FIELD:' +field);
			}
		}

DataFromText.cls

static public Boolean enterDataFromText(String dataString) {
  	List<String> data = dataString.split('\n');
		List<Merchandise__c> merch= new List<Merchandise__c>();
		for(String s : data) {
			List<String> objectData = s.split(',');
			Merchandise__c m = new Merchandise__c(Name=objectData[0].replaceAll('"',''),Quantity__c=Decimal.valueOf(objectData[1]),Price__c=Decimal.valueOf(objectData[2]));
			merch.add(m);
		}
		try {
			insert merch;
			return true;
		} catch(DMLException d) {
			return false;
		}
		
	

HTTPMockInterface.cls

@isTest
global class MockHttpResponseGenerator implements HttpCalloutMock {
    // Implement this interface method 
    
    global HTTPResponse respond(HTTPRequest req) {
        // Optionally, only send a mock response for a specific endpoint 
    
        // and method. 
    
        System.assertEquals('http://api.salesforce.com/foo/bar', req.getEndpoint());
        System.assertEquals('GET', req.getMethod());
        
        // Create a fake response 
    
        HttpResponse res = new HttpResponse();
        res.setHeader('Content-Type', 'application/json');
        res.setBody('{"foo":"bar"}');
        res.setStatusCode(200);
        return res;
    }
}

TestLoadData.cls

//CreatedDate cannot be written, but it can be imported
List<Invoice__c> invoices = Test.loadData(Invoice__c.sObjectType, 'InvoiceData');
update invoices;
	

TestMockInterface.cls

@isTest
private class CalloutClassTest {
     @isTest static void testCallout() {
        // Set mock callout class  
    
        Test.setMock(HttpCalloutMock.class, new MockHttpResponseGenerator());
        
        // Call class that utilizes this endpoint 
        HttpResponse res = CalloutClass.getInfoFromExternalService();
        
        // Verify response received contains fake values 
        String contentType = res.getHeader('Content-Type');
        System.assert(contentType == 'application/json');
        String actualValue = res.getBody();
        String expectedValue = '{"foo":"bar"}';
        System.assertEquals(actualValue, expectedValue);
        System.assertEquals(200, res.getStatusCode());
    }
}