1 files changed, 52 insertions, 0 deletions
diff --git a/tests/phpunit/unit/includes/composer/PhpUnitSplitter/PhpUnitXmlTest.php b/tests/phpunit/unit/includes/composer/PhpUnitSplitter/PhpUnitXmlTest.php
new file mode 100644
index 000000000000..6b30596e90bf
--- /dev/null
+++ b/tests/phpunit/unit/includes/composer/PhpUnitSplitter/PhpUnitXmlTest.php
@@ -0,0 +1,52 @@
+<?php
+
+declare( strict_types = 1 );
+
+namespace MediaWiki\Tests\Unit\composer\PhpUnitSplitter;
+
+use MediaWiki\Composer\PhpUnitSplitter\PhpUnitXml;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @license GPL-2.0-or-later
+ * @covers \MediaWiki\Composer\PhpUnitSplitter\PhpUnitXml
+ */
+class PhpUnitXmlTest extends TestCase {
+
+	private const BASIC_XML = '<?xml version="1.0" encoding="UTF-8"?>
+<phpunit bootstrap="tests/phpunit/bootstrap.php">
+<testsuites>
+	<testsuite name="core:unit">
+		<directory>tests/phpunit/unit</directory>
+	</testsuite>
+</testsuites>
+</phpunit>';
+
+	public function createFixtureFile( string $data ): string {
+		$filename = tempnam( sys_get_temp_dir(), "phpunit-test" );
+		file_put_contents( $filename, $data );
+		return $filename;
+	}
+
+	public function testFixtureContainsNoSplitGroups() {
+		$phpUnitXmlFile = $this->createFixtureFile( self::BASIC_XML );
+		$phpUnitXml = new PhpUnitXml( $phpUnitXmlFile );
+		$this->assertFalse( $phpUnitXml->containsSplitGroups(), "No split groups expected in fixture" );
+		unlink( $phpUnitXmlFile );
+	}
+
+	public function testAddSplitGroups() {
+		$phpUnitXmlFile = $this->createFixtureFile( self::BASIC_XML );
+		$phpUnitXml = new PhpUnitXml( $phpUnitXmlFile );
+		$phpUnitXml->addSplitGroups( [
+			[ "file1.php", "file2.php" ],
+			[ "file3.php", "file4.php" ],
+			[ "file7.php", "file6.php" ],
+			[ "file9.php", "file8.php" ],
+			[ "file11.php", "file10.php" ],
+			[ "file13.php", "file12.php" ],
+		] );
+		$this->assertTrue( $phpUnitXml->containsSplitGroups(), "Expected groups to be added" );
+		unlink( $phpUnitXmlFile );
+	}
+}