Move DiffEngine and helpers to includes/libs/Diff and put them in a namespace

I will address the dependencies on MW core in a followup.

Bug: T339184
Change-Id: I892364b0c9f15c9de4cfc29c683670c172d71764

1 files changed, 21 insertions, 0 deletions

diff --git a/tests/phpunit/unit/includes/libs/Diff/DiffTest.php b/tests/phpunit/unit/includes/libs/Diff/DiffTest.php
new file mode 100644
index 000000000000..e5447afc44c6
--- /dev/null
+++ b/tests/phpunit/unit/includes/libs/Diff/DiffTest.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace Wikimedia\Diff;
+
+/**
+ * @author Addshore
+ *
+ * @group Diff
+ */
+class DiffTest extends \MediaWikiUnitTestCase {
+
+	/**
+	 * @covers Diff::getEdits
+	 */
+	public function testGetEdits() {
+		$obj = new Diff( [], [] );
+		$obj->edits = 'FooBarBaz';
+		$this->assertEquals( 'FooBarBaz', $obj->getEdits() );
+	}
+
+}