PHPUnit Pocket Guide

Implement PHPUnit2_Framework_Test

The PHPUnit2_Framework_Test interface is narrow and easy to implement. You can write an implementation of PHPUnit2_ Framework_Test that is simpler than PHPUnit2_Framework_ TestCase and that runs data-driven tests, for instance.

Example 25 shows a data-driven test-case class that compares values from a file with Comma-Separated Values (CSV). Each line of such a file looks like foo;bar, where the first value is the one we expect and the second value is the actual one.

Example 25. A data-driven test

<?php require_once 'PHPUnit2/Framework/Assert.php'; require_once 'PHPUnit2/Framework/Test.php'; require_once 'PHPUnit2/Framework/TestResult.php'; class DataDrivenTest implements PHPUnit2_Framework_Test { const DATA_FILE = 'data.csv'; public function __construct( ) { $this->lines = file(self::DATA_FILE); } public function countTestCases( ) { return sizeof($this->lines); } public function run($result = NULL) { if ($result === NULL) { $result = new PHPUnit2_Framework_TestResult; } $result->startTest($this); foreach ($this->lines as $line) { list($expected, $actual) = explode(';', $line); try { PHPUnit2_Framework_Assert::assertEquals( trim($expected), trim($actual)); } catch (PHPUnit2_Framework_ComparisonFailure $e) { $result->addFailure($this, $e); } catch (Exception $e) { $result->addError($this, $e); } } $result->endTest($this); return $result; } } $test = new DataDrivenTest; $result = $test->run( ); $failures = $result->failures( ); print $failures[0]->thrownException( )->toString( ); ...