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012-tests.md

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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 test method name.
  • If necessary, the test method phpdoc may describe the desired behavior.
  • The test must be structured as AAA - arrange, act, assert that's first we're preparing what's necessary then making calls then asserting everything is correct.
  • 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.