012 — Tests

For each package, we're adding unit-tests that are run via PHPUnit. When designing tests, the following guidelines should be taken into account.

• Test class should be marked as final by default.
• @test annotation must not be used, prefix methods with test.
• The test method name must reflect the purpose of the test.
• "should" must not be used in the test method name.
• If necessary, the test method phpdoc may describe the desired behavior.
• The test must follow AAA: first arrange the necessary preconditions, then act, then assert expected results.
• There must be one test case per test method that's a single AAA.
• Test must use public API. Private properties or methods shouldn't be accessed, assumptions on internals of the class tested shouldn't be made.
• Tests shouldn't rely on composer-config-plugin and DI container unless necessary.