From e359eafe6cc47323f44c62cbe95e74dab8da7102 Mon Sep 17 00:00:00 2001
From: "Moritz Schubotz (physikerwelt)" <wiki@physikerwelt.de>
Date: Mon, 21 May 2018 12:38:10 +0200
Subject: [PATCH] Improve tests coverage for MathPng

Change-Id: Ibb5138512afd20304983be44e0ab45a244634b4b
---
 tests/phpunit/MathPngTest.php | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 tests/phpunit/MathPngTest.php

diff --git a/tests/phpunit/MathPngTest.php b/tests/phpunit/MathPngTest.php
new file mode 100644
index 000000000..236e8babc
--- /dev/null
+++ b/tests/phpunit/MathPngTest.php
@@ -0,0 +1,29 @@
+<?php
+
+/**
+ * @covers MathPng
+ *
+ * @license GPL-2.0-or-later
+ */
+class MathPngTest extends MediaWikiTestCase {
+
+	/** @var string The fallback image HTML tag */
+	const TEST_DUMMY = '<img src="test.png" />';
+
+	public function testConstructor() {
+		$renderer = new MathPng( 'a' );
+
+		$this->assertEquals( 'png', $renderer->getMode() );
+	}
+
+	public function testOutput() {
+		$renderer = $this->getMockBuilder( MathPng::class )
+			->setMethods( [ 'getFallbackImage' ] )
+			->getMock();
+		$renderer->method( 'getFallbackImage' )
+			->willReturn( self::TEST_DUMMY );
+
+		$this->assertSame( self::TEST_DUMMY, $renderer->getHtmlOutput() );
+	}
+
+}