public function testRender()
{
$graph = new Digraph('G');
$this->assertEquals("digraph G {\n};\n", $graph->render(), "Render empty graph");
$this->assertEquals(" digraph G {\n };\n", $graph->render(1), "Render empty graph with indent");
$this->assertEquals(" digraph G {\n };\n", $graph->render(1, " "), "Render empty graph with indent and spaces");
$mock = $this->getMock('Alom\\Graphviz\\Digraph\\InstructionInterface', array('render'));
$mock->expects($this->once())->method('render')->with(2, " ")->will($this->returnValue(" foobarbaz;\n"));
$graph->append($mock);
$this->assertEquals(" digraph G {\n foobarbaz;\n };\n", $graph->render(1, " "), "Render with statements");
}
