Verify expected reverse paths in a graph.

@internal

Parameters

array $graph: A graph array processed by \Drupal\Component\Graph\Graph::searchAndSort()

array $expected_reverse_paths: An associative array containing vertices with their expected reverse paths.

1 call to GraphTest::assertReversePaths()

GraphTest::testDepthFirstSearch in core/tests/Drupal/Tests/Component/Graph/GraphTest.php

Tests depth-first-search features.

File

core/tests/Drupal/Tests/Component/Graph/GraphTest.php, line 133

Class

GraphTest

@coversDefaultClass \Drupal\Component\Graph\Graph[[api-linebreak]] @group Graph

Namespace

Drupal\Tests\Component\Graph

Code

protected function assertReversePaths(array $graph, array $expected_reverse_paths) : void {
  foreach ($expected_reverse_paths as $vertex => $paths) {
    // Build an array with keys = $paths and values = TRUE.
    $expected = array_fill_keys($paths, TRUE);
    $result = $graph[$vertex]['reverse_paths'] ?? [];
    $this->assertEquals($expected, $result, sprintf('Expected reverse paths for vertex %s: %s, got %s', $vertex, $this->displayArray($expected, TRUE), $this->displayArray($result, TRUE)));
  }
}

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