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System Assert Failing

Knowledge Article Number 000002839

Difference between System.Assert vs System.AssertEquals

  • System.Assert accepts two parameters, one (mandatory) which is the condition to test for and the other a message (optional) to display should that condition be false.
  • System.AssertEquals and System.AssertNotEquals both accepts three parameters; the first two (mandatory) are the variables that will be tested for in/equality and the third (optional) is the message to display if the assert results in false.

Both are used in Test Class for “Positive Case Testing” and “Negative Case Testing” with single and multiple records.


Let’s use System.assert and System.assertEquals to do the testing in sample Negative Test Class:

static testMethod void runNegativeTestCases(){
	User u3 = [select id from User where alias='tuser'];     
		System.debug('Inserting a record with 501 miles... (negative test case)');

		Mileage__c testMiles3 = new Mileage__c( Miles__c = 501, Date__c = );

			insert testMiles3;

		}catch (DmlException e){

			//Assert Error Message 

			System.assert( e.getMessage().contains('Insert failed. First exception on ' +'row 0; first error:FIELD_CUSTOM_VALIDATION_EXCEPTION,'+'Mileage request exceeds daily limit(500): [Miles__c]'),e.getMessage() );

			//Assert field 

			System.assertEquals(Mileage__c.Miles__c, e.getDmlFields(0)[0]);

			//Assert Status Code 

			System.assertEquals('FIELD_CUSTOM_VALIDATION_EXCEPTION' , e.getDmlStatusCode(0) );

		} //catch 

} //RunAs(u3)

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