--- /dev/null
+<?php
+
+namespace Drupal\Tests\Core\Plugin;
+
+use Drupal\Component\Plugin\ConfigurablePluginInterface;
+use Drupal\Component\Plugin\PluginBase;
+use Drupal\Core\Plugin\DefaultSingleLazyPluginCollection;
+
+/**
+ * @coversDefaultClass \Drupal\Core\Plugin\DefaultSingleLazyPluginCollection
+ * @group Plugin
+ */
+class DefaultSingleLazyPluginCollectionTest extends LazyPluginCollectionTestBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setupPluginCollection(\PHPUnit_Framework_MockObject_Matcher_InvokedRecorder $create_count = NULL) {
+ $definitions = $this->getPluginDefinitions();
+ $this->pluginInstances['apple'] = new ConfigurablePlugin(['id' => 'apple', 'key' => 'value'], 'apple', $definitions['apple']);
+ $this->pluginInstances['banana'] = new ConfigurablePlugin(['id' => 'banana', 'key' => 'other_value'], 'banana', $definitions['banana']);
+
+ $create_count = $create_count ?: $this->never();
+ $this->pluginManager->expects($create_count)
+ ->method('createInstance')
+ ->willReturnCallback(function ($id) {
+ return $this->pluginInstances[$id];
+ });
+
+ $this->defaultPluginCollection = new DefaultSingleLazyPluginCollection($this->pluginManager, 'apple', ['id' => 'apple', 'key' => 'value']);
+ }
+
+ /**
+ * Tests the get() method.
+ */
+ public function testGet() {
+ $this->setupPluginCollection($this->once());
+ $apple = $this->pluginInstances['apple'];
+
+ $this->assertSame($apple, $this->defaultPluginCollection->get('apple'));
+ }
+
+ /**
+ * @covers ::addInstanceId
+ * @covers ::getConfiguration
+ * @covers ::setConfiguration
+ */
+ public function testAddInstanceId() {
+ $this->setupPluginCollection($this->any());
+
+ $this->assertEquals(['id' => 'apple', 'key' => 'value'], $this->defaultPluginCollection->get('apple')->getConfiguration());
+ $this->assertEquals(['id' => 'apple', 'key' => 'value'], $this->defaultPluginCollection->getConfiguration());
+
+ $this->defaultPluginCollection->addInstanceId('banana', ['id' => 'banana', 'key' => 'other_value']);
+
+ $this->assertEquals(['id' => 'apple', 'key' => 'value'], $this->defaultPluginCollection->get('apple')->getConfiguration());
+ $this->assertEquals(['id' => 'banana', 'key' => 'other_value'], $this->defaultPluginCollection->getConfiguration());
+ $this->assertEquals(['id' => 'banana', 'key' => 'other_value'], $this->defaultPluginCollection->get('banana')->getConfiguration());
+ }
+
+}
+
+class ConfigurablePlugin extends PluginBase implements ConfigurablePluginInterface {
+
+ public function __construct(array $configuration, $plugin_id, $plugin_definition) {
+ parent::__construct($configuration, $plugin_id, $plugin_definition);
+
+ $this->configuration = $configuration + $this->defaultConfiguration();
+ }
+
+ public function defaultConfiguration() {
+ return [];
+ }
+
+ public function getConfiguration() {
+ return $this->configuration;
+ }
+
+ public function setConfiguration(array $configuration) {
+ $this->configuration = $configuration;
+ }
+
+ public function calculateDependencies() {
+ return [];
+ }
+
+}