function GraphUnitTest::assertComponents

Verify expected components in a graph.

Parameters

$graph: A graph array processed by drupal_depth_first_search().

$expected_components: An array containing of components defined as a list of their vertices.

File

modules/simpletest/tests/graph.test, line 148

Class

GraphUnitTest

Unit tests for the graph handling features.

Code

function assertComponents($graph, $expected_components) {
  $unassigned_vertices = array_fill_keys(array_keys($graph), TRUE);
  foreach ($expected_components as $component) {
    $result_components = array();
    foreach ($component as $vertex) {
      $result_components[] = $graph[$vertex]['component'];
      unset($unassigned_vertices[$vertex]);
    }
    $this->assertEqual(1, count(array_unique($result_components)), format_string('Expected one unique component for vertices @vertices, got @components', array(
      '@vertices' => $this->displayArray($component),
      '@components' => $this->displayArray($result_components),
    )));
  }
  $this->assertEqual(array(), $unassigned_vertices, format_string('Vertices not assigned to a component: @vertices', array(
    '@vertices' => $this->displayArray($unassigned_vertices, TRUE),
  )));
}