StructureTest.php

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<?php
class StructureTest extends MediaWikiTestCase {
        public function testUnitTestFileNamesEndWithTest() {
                if ( wfIsWindows() ) {
                        $this->markTestSkipped( 'This test does not work on Windows' );
                }
                $rootPath = escapeshellarg( __DIR__ );
                $testClassRegex = implode( '|', array(
                        'ApiFormatTestBase',
                        'ApiTestCase',
                        'MediaWikiLangTestCase',
                        'MediaWikiTestCase',
                        'PHPUnit_Framework_TestCase',
                        'DumpTestCase',
                ) );
                $testClassRegex = "^class .* extends ($testClassRegex)";
                $finder = "find $rootPath -name '*.php' '!' -name '*Test.php'" .
                        " | xargs grep -El '$testClassRegex|function suite\('";

                $results = null;
                $exitCode = null;
                exec($finder, $results, $exitCode);

                $this->assertEquals(
                        0,
                        $exitCode,
                        'Verify find/grep command succeeds.'
                );

                $results = array_filter(
                        $results,
                        array( $this, 'filterSuites' )
                );
                $strip = strlen( $rootPath ) - 1;
                foreach( $results as $k => $v) {
                        $results[$k] = substr( $v, $strip );
                }
                $this->assertEquals(
                        array(),
                        $results,
                        "Unit test file in $rootPath must end with Test."
                );
        }

        public function filterSuites( $filename ) {
                return strpos( $filename, __DIR__ . '/suites/' ) !== 0;
        }
}