public function testToStringAndFrontMatter()
 {
     $tmpMarkdown = '# Foo';
     $tmpFrontMatter = array('Tag' => array('Bar', 'Bazz', 'Buzz'));
     $mdObj = new MarkdownRevision('# Foo');
     $mdObj->setFrontMatter($tmpFrontMatter);
     // In the test fixture, we said that "Foo" was the content of the
     // contribution, let’s test that. Also, we may change the way the
     // content is generated, see MarkdownRevision for instance.
     $this->assertSame("---\nTag:\n  - Bar\n  - Bazz\n  - Buzz\n\n---\n# Foo", (string) $mdObj);
 }