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<?php

namespace Drupal\Tests\Core\Menu;

use Drupal\Core\Menu\MenuTreeParameters;
use Drupal\Tests\UnitTestCase;

/**
 * Tests the menu link tree parameters value object.
 *
 * @group Menu
 *
 * @coversDefaultClass \Drupal\Core\Menu\MenuTreeParameters
 */
class MenuTreeParametersTest extends UnitTestCase {

  /**
   * Provides test data for testSetMinDepth().
   */
  public function providerTestSetMinDepth() {
    $data = [];

    // Valid values at the extremes and in the middle.
    $data[] = [1, 1];
    $data[] = [2, 2];
    $data[] = [9, 9];

    // Invalid values are mapped to the closest valid value.
    $data[] = [-10000, 1];
    $data[] = [0, 1];
    // … except for those invalid values that reach beyond the maximum depth,
    // because MenuTreeParameters is a value object and hence cannot depend
    // on anything; to know the actual maximum depth, it'd have to depend on the
    // MenuTreeStorage service.
    $data[] = [10, 10];
    $data[] = [100000, 100000];

    return $data;
  }

  /**
   * Tests setMinDepth().
   *
   * @covers ::setMinDepth
   * @dataProvider providerTestSetMinDepth
   */
  public function testSetMinDepth($min_depth, $expected) {
    $parameters = new MenuTreeParameters();
    $parameters->setMinDepth($min_depth);
    $this->assertEquals($expected, $parameters->minDepth);
  }

  /**
   * Tests addExpandedParents().
   *
   * @covers ::addExpandedParents
   */
  public function testAddExpanded() {
    $parameters = new MenuTreeParameters();

    // Verify default value.
    $this->assertEquals([], $parameters->expandedParents);

    // Add actual menu link plugin IDs to be expanded.
    $parameters->addExpandedParents(['foo', 'bar', 'baz']);
    $this->assertEquals(['foo', 'bar', 'baz'], $parameters->expandedParents);

    // Add additional menu link plugin IDs; they should be merged, not replacing
    // the old ones.
    $parameters->addExpandedParents(['qux', 'quux']);
    $this->assertEquals(['foo', 'bar', 'baz', 'qux', 'quux'], $parameters->expandedParents);

    // Add pre-existing menu link plugin IDs; they should not be added again;
    // this is a set.
    $parameters->addExpandedParents(['bar', 'quux']);
    $this->assertEquals(['foo', 'bar', 'baz', 'qux', 'quux'], $parameters->expandedParents);
  }

  /**
   * Tests addCondition().
   *
   * @covers ::addCondition
   */
  public function testAddCondition() {
    $parameters = new MenuTreeParameters();

    // Verify default value.
    $this->assertEquals([], $parameters->conditions);

    // Add a condition.
    $parameters->addCondition('expanded', 1);
    $this->assertEquals(['expanded' => 1], $parameters->conditions);

    // Add another condition.
    $parameters->addCondition('has_children', 0);
    $this->assertEquals(['expanded' => 1, 'has_children' => 0], $parameters->conditions);

    // Add a condition with an operator.
    $parameters->addCondition('provider', ['module1', 'module2'], 'IN');
    $this->assertEquals(['expanded' => 1, 'has_children' => 0, 'provider' => [['module1', 'module2'], 'IN']], $parameters->conditions);

    // Add another condition with an operator.
    $parameters->addCondition('id', 1337, '<');
    $this->assertEquals(['expanded' => 1, 'has_children' => 0, 'provider' => [['module1', 'module2'], 'IN'], 'id' => [1337, '<']], $parameters->conditions);

    // It's impossible to add two conditions on the same field; in that case,
    // the old condition will be overwritten.
    $parameters->addCondition('provider', 'other_module');
    $this->assertEquals(['expanded' => 1, 'has_children' => 0, 'provider' => 'other_module', 'id' => [1337, '<']], $parameters->conditions);
  }

  /**
   * Tests onlyEnabledLinks().
   *
   * @covers ::onlyEnabledLinks
   */
  public function testOnlyEnabledLinks() {
    $parameters = new MenuTreeParameters();
    $parameters->onlyEnabledLinks();
    $this->assertEquals(1, $parameters->conditions['enabled']);
  }

  /**
   * Tests setTopLevelOnly().
   *
   * @covers ::setTopLevelOnly
   */
  public function testSetTopLevelOnly() {
    $parameters = new MenuTreeParameters();
    $parameters->setTopLevelOnly();
    $this->assertEquals(1, $parameters->maxDepth);
  }

  /**
   * Tests excludeRoot().
   *
   * @covers ::excludeRoot
   */
  public function testExcludeRoot() {
    $parameters = new MenuTreeParameters();
    $parameters->excludeRoot();
    $this->assertEquals(1, $parameters->minDepth);
  }

  /**
   * @covers ::serialize
   * @covers ::unserialize
   */
  public function testSerialize() {
    $parameters = new MenuTreeParameters();
    $parameters->setRoot(1);
    $parameters->setMinDepth('2');
    $parameters->setMaxDepth('9');
    $parameters->addExpandedParents(['', 'foo']);
    $parameters->setActiveTrail(['', 'bar']);

    $after_serialize = unserialize(serialize($parameters));
    $this->assertSame('1', $after_serialize->root);
    $this->assertSame(2, $after_serialize->minDepth);
    $this->assertSame(9, $after_serialize->maxDepth);
    $this->assertSame(['', 'foo'], $after_serialize->expandedParents);
    $this->assertSame(['bar'], $after_serialize->activeTrail);
  }

}