Drupal 7 with php unit

Editor's Notes

• #4: xUnit is the collective name for several unit testing frameworks that derive their structure and functionality from Smalltalk's SUnit. SUnit, designed by Kent Beck in 1998, was written in a highly structured object-oriented style, which lent easily to contemporary languages such as Java and C#. Following its introduction in Smalltalk the framework was ported to Java by Kent Beck and Erich Gamma and gained wide popularity, eventually gaining ground in the majority of programming languages in current use. The names of many of these frameworks are a variation on "SUnit", usually replacing the "S" with the first letter (or letters) in the name of their intended language
• #6: Reduction in Development Time With the help of PHPUnit testing, you can find issues early in the development cycle. This includes both bugs and missing parts of the specification for the unit. As you’ll write and run tests alongside development, issues will be picked up as soon as they occur, instead of being found at the end of the development process. The backtracking of the issues may be costly if found towards the end. Facilitates change We all know that changing code conveys a hazard. Will the new code work the same way as the old one? PHPUnit testing permits the programmer to refactor code or upgrade framework libraries at a later date, and ensure the module still works effectively. The methodology is to write test cases for all functions and methods so that at whatever point a change causes a fault, it can be immediately identified. Simplifies integration PHPUnit testing may reduce uncertainty in the units themselves and can be utilized as a part of a bottom-up testing approach. By testing the elements of a program first and then testing its subparts, integration testing becomes much easier. Enhance Design At the point when programming is developed using a test-driven approach, the combination of writing the PHPUnit test to determine the interface in addition to the refactoring activities performed after the test is passing, may replace formal design. Each unit test can be viewed as a design element specifying classes, methods, and perceptible behavior. When you include Mock Objects this can drive the design of multiple classes and their interactions with each other. It will enhance design because testable classes should essentially be more adaptable and decoupled. Measure of Completion If you’ve written your tests to cover every single required features and functionality of classes, and all are passing, then it’s reasonably safe to accept that you’ve completed the code successfully. If some time later, there might arise a need to add new feature to the application, in this scenario with agile practices the tests can not only drive design but also capture functional prerequisites. As per the saying “The only way to go fast is to go well” testing is inevitable aspect of effective application development. You can create something truly rapidly but without testing the technical depth, it might create drawbacks and each change to overcome these drawbacks will be very costly. PHPUnit frameworks empower you to write higher quality PHP code and empowers you to develop PHP web applications.
• #7: Assertions these are what you add to your tests to ‘assert’ that something is valid, for example, an AssertFileExists would be used to check that a specified file exists what is expected. As a best practice, you would have one assertion for each test though there’s nothing to stop you having a few. Stubs If the unit of code you’re testing has a relied upon another object, you could use a ‘stub’ as a ‘test double’ to replace the original component. This allows you to focus on only testing of that one unit of code. You can configure stub techniques to return custom qualities. Mocks It is also used as a ‘test double’ similar like Stub, but to check that the test double object has received requests from the subject code as per defined expectations. Annotations An annotation is a unique type of syntactic metadata that can be added to the source code in PHP. It is used for annotating source code. For an instance @after annotation can be used to specify methods that should be called after each test method in a test case class. When we are writing a test in which we cannot (or chose not to) use a real depended-on component (DOC), we can replace it with a Test Double. The Test Double doesn't have to behave exactly like the real DOC; it merely has to provide the same API as the real one so that the SUT thinks it is the real one!
• #11: Source: https://phpunit.de/manual/6.1/en/index.html