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HTML Dynamic TestRunner for PHPUnit

17 settembre 2003

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Yesterday I set up to write unit tests for a few PHP classes I’m refactoring. Given my usual tendency to set aside serious tasks and concentrate on eye candy, after a few tests I decided to write my own test runner (something I’ve done at least twice before, never storing away the code for later use).

My test runner builds on a few assumptions:

  • the tests live in a web accessible directory
  • every php file in the directory with a name starting with test is a test case
  • every test file contains one case class extending PHPUnit_TestCase
  • every test class has the same name as the file where it resides
  • test cases are all the methods of the class whose names start with test
  • you run tests and see results with a web browser

The main test runner features are:

  • conditional execution of one or more test cases based on an HTML form
  • run only/exclude a test with a single click of the mouse
  • display aggregate test results by suite, showing counts for successes/failures and a warning indicator if any have been raised
  • optionally expand test results to show results/failures for single test cases
  • remember each suite visibility status (collapsed/expanded) for subsequent runs
  • collect PHP warnings emitted during each test case run and display them under the appropriate test suite

I made a few screenshots, showing a collapsed view of all available suites, the same for a single suite, with a warning indicator, and one suite expanded, showing test cases results and warnings.

The DynamicTestRunner code only needs to include the PEAR version of PHPUnit. Using a templating engine would have made the code more understandable, but at the cost of introducing a dependency.

If you want to preserve the option of being able to run each test file on its own, you can test if it has been called by testRunner with a simple if statement at the end of each test file (substituing of course testEntities with the name of the class declared in the file):

if (!isset($_SERVER['SCRIPT_FILENAME']) ||
    $_SERVER['SCRIPT_FILENAME'] == __FILE__) {
    $suite = new PHPUnit_TestSuite('testEntities');
    $result = PHPUnit::run($suite);
    echo $result->toString();
}