This parameter should be used in all asserts.CodeT5 builds on Google’s T5 (Text-to-Text Transfer Transformer) framework, which was first detailed in a paper published in 2020. There is an optional parameter that allows for an explanation of the test and why it failed. Salesforce provides a few different assertion methods. A test without assert statements is NOT a test! So it is possible to have a unit test without an assert and Salesforce will consider the code tested/covered. Salesforce requires 75% overall code coverage but does not take into account the use of assert statements. It is very important to use assert statements in your tests. This is more to cover end-to-end user journeys and because these tests are expensive to maintain and are long running it is best to try to limit the number of tests at the top of the pyramid. Typically some automated tool like Selenium is used here. This is the level where browser testing takes place. There is good documentation on Salesforce “unit” tests here. In an ideal testing scenario these tests should be generally a happy path test to make sure the units works in aggregation. Salesforce’s “unit” testing is actually more of an integration/service level test as it relies on test data inserted into the database and often the test runs over many units of code. More info can be found static void setup () Integration/Service Testing This can be achieved using the annotation for setting up and tearing down dependancies and variables that would otherwise be used several times. Tests should not be aware of each other or share any state as this can lead to false positives. Proper use of dependency injection and mocking allows for tests to focus on the unit they are concerned with and also allows them to ignore other parts of the codebase. A common example is mocking the database query results in your Selector layer when unit testing the Domain layer. Using dependency injection techniques allows you to mock the dependencies between layers in your tests. Here is where the bulk of tests should reside and happy path, negative path, and edge case testing should occur. To allow for true unit testing in Apex you must organize your code in layers (see more info here NEED TO ADD LINK TO GENERAL STYLE GUIDE). Salesforce “unit” tests are not true unit tests and are more at the integration/service level as they test units in aggregation. The annotation overrides this “safety” feature and should only be used in very unique cases when you cannot create your own test data. This is good practice and forces you to create your test data in isolation. By default test classes/methods do not have access to pre-existing data in the organization, such as standard objects, custom objects, and custom settings data. Using this annotation greatly slows down test times as well as making the tests dependent on existing data in the organization/salesforce instance. OpportunityLineItemsTest (for the “OpportunityLineItems” class).To keep tests next to their subjects the word “Test” should be appended to the end of the class name that is being tested: Salesforce has no definable directory structure so its helpful to keep classes grouped together in an alphabetical listing under the classes folder. This article is writed by my collegue "Brian" and "Thomas"
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