assertEquals('text/x-php', Mimetypes::getInstance()->fromExtension('php')); } public function testGetsFromFilename() { $this->assertEquals('text/x-php', Mimetypes::getInstance()->fromFilename(__FILE__)); } public function testGetsFromCaseInsensitiveFilename() { $this->assertEquals('text/x-php', Mimetypes::getInstance()->fromFilename(strtoupper(__FILE__))); } public function testReturnsNullWhenNoMatchFound() { $this->assertNull(Mimetypes::getInstance()->fromExtension('foobar')); } }