IHF: format_xml helper tests added.

Author: dmitry-ivanov

tests/format/FormatXmlTest.php

@@ -0,0 +1,13 @@
+<?php
+
+class FormatXmlTest extends TestCase
+{
+    /** @test */
+    public function it_formats_passed_xml_string()
+    {
+        $unformatted = file_get_contents(__DIR__ . '/FormatXmlTest/unformatted.xml');
+        $expected = file_get_contents(__DIR__ . '/FormatXmlTest/formatted.xml');
+
+        $this->assertEquals($expected, format_xml($unformatted));
+    }
+}