Stub vs. Mock - Top Differences You Must Know

No, mocks and stubs are not same. A typical stub is a database connection that enables you to simulate any scenario even in the absence of an actual database. A mock is a made-up class that can be investigated for its interactions with the actual class being tested after the test has been completed.

You can restrict or limit the behaviour of the collaborators by using test doubles. This separates the thing from outside influences. Additionally, employing test doubles allows you to eliminate expensive dependencies that can be out of your control, cause indeterminacy or performance penalties, or all of the above.

A stub is a little piece of code used in testing to replace another component. Using a stub has the advantage of returning consistent results, which makes the test easier to construct. When a unit being tested has external dependencies, unit testing procedures such as mocking are applied. Mocking serves to separate and concentrate attention on the code being tested from the behaviour or state of external dependencies.

Test double is a generic term used for mock, stub and fake. Mock test double are essentially practise exams that are created solely using the most recent exam format and course material. These are practise examinations that mimic real ones so that candidates can assess their true potential.

A stub is a little software procedure that stands in for a lengthier one that might be loaded later or that is run from a different location. For instance, stubs that stand in for the programme that delivers a requested procedure are compiled into programmes that employ Remote Procedure Calls (RPC).

A stub is a manageable replacement for a system collaborator or dependent that already exists. You can test your code without explicitly addressing the dependency by using a stub.