--- /dev/null
+<?php
+
+namespace Drupal\Tests\views\Functional\Plugin;
+
+use Drupal\Tests\views\Functional\ViewTestBase;
+use Drupal\views\Views;
+use Drupal\views_test_data\Plugin\views\filter\FilterTest as FilterPlugin;
+
+/**
+ * Tests general filter plugin functionality.
+ *
+ * @group views
+ * @see \Drupal\views\Plugin\views\filter\FilterPluginBase
+ */
+class FilterTest extends ViewTestBase {
+
+ /**
+ * Views used by this test.
+ *
+ * @var array
+ */
+ public static $testViews = ['test_filter', 'test_filter_in_operator_ui'];
+
+ /**
+ * Modules to enable.
+ *
+ * @var array
+ */
+ public static $modules = ['views_ui', 'node'];
+
+ protected function setUp($import_test_views = TRUE) {
+ parent::setUp($import_test_views);
+
+ $this->enableViewsTestModule();
+
+ $this->adminUser = $this->drupalCreateUser(['administer views']);
+ $this->drupalLogin($this->adminUser);
+ $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
+ $this->drupalCreateContentType(['type' => 'page', 'name' => 'Page']);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function viewsData() {
+ $data = parent::viewsData();
+ $data['views_test_data']['name']['filter']['id'] = 'test_filter';
+
+ return $data;
+ }
+
+ /**
+ * Test query of the row plugin.
+ */
+ public function testFilterQuery() {
+ // Check that we can find the test filter plugin.
+ $plugin = $this->container->get('plugin.manager.views.filter')->createInstance('test_filter');
+ $this->assertTrue($plugin instanceof FilterPlugin, 'Test filter plugin found.');
+
+ $view = Views::getView('test_filter');
+ $view->initDisplay();
+
+ // Change the filtering.
+ $view->displayHandlers->get('default')->overrideOption('filters', [
+ 'test_filter' => [
+ 'id' => 'test_filter',
+ 'table' => 'views_test_data',
+ 'field' => 'name',
+ 'operator' => '=',
+ 'value' => 'John',
+ 'group' => 0,
+ ],
+ ]);
+
+ $this->executeView($view);
+
+ // Make sure the query have where data.
+ $this->assertTrue(!empty($view->query->where));
+
+ // Check the data added.
+ $where = $view->query->where;
+ $this->assertIdentical($where[0]['conditions'][0]['field'], 'views_test_data.name', 'Where condition field matches');
+ $this->assertIdentical($where[0]['conditions'][0]['value'], 'John', 'Where condition value matches');
+ $this->assertIdentical($where[0]['conditions'][0]['operator'], '=', 'Where condition operator matches');
+
+ $this->executeView($view);
+
+ // Check that our operator and value match on the filter.
+ $this->assertIdentical($view->filter['test_filter']->operator, '=');
+ $this->assertIdentical($view->filter['test_filter']->value, 'John');
+
+ // Check that we have a single element, as a result of applying the '= John'
+ // filter.
+ $this->assertEqual(count($view->result), 1, format_string('Results were returned. @count results.', ['@count' => count($view->result)]));
+
+ $view->destroy();
+
+ $view->initDisplay();
+
+ // Change the filtering.
+ $view->displayHandlers->get('default')->overrideOption('filters', [
+ 'test_filter' => [
+ 'id' => 'test_filter',
+ 'table' => 'views_test_data',
+ 'field' => 'name',
+ 'operator' => '<>',
+ 'value' => 'John',
+ 'group' => 0,
+ ],
+ ]);
+
+ $this->executeView($view);
+
+ // Check that our operator and value match on the filter.
+ $this->assertIdentical($view->filter['test_filter']->operator, '<>');
+ $this->assertIdentical($view->filter['test_filter']->value, 'John');
+
+ // Check if we have the other elements in the dataset, as a result of
+ // applying the '<> John' filter.
+ $this->assertEqual(count($view->result), 4, format_string('Results were returned. @count results.', ['@count' => count($view->result)]));
+
+ $view->destroy();
+ $view->initDisplay();
+
+ // Set the test_enable option to FALSE. The 'where' clause should not be
+ // added to the query.
+ $view->displayHandlers->get('default')->overrideOption('filters', [
+ 'test_filter' => [
+ 'id' => 'test_filter',
+ 'table' => 'views_test_data',
+ 'field' => 'name',
+ 'operator' => '<>',
+ 'value' => 'John',
+ 'group' => 0,
+ // Disable this option, so nothing should be added to the query.
+ 'test_enable' => FALSE,
+ ],
+ ]);
+
+ // Execute the view again.
+ $this->executeView($view);
+
+ // Check if we have all 5 results.
+ $this->assertEqual(count($view->result), 5, format_string('All @count results returned', ['@count' => count($view->displayHandlers)]));
+ }
+
+ /**
+ * Test no error message is displayed when all options are selected in an
+ * exposed filter.
+ */
+ public function testInOperatorSelectAllOptions() {
+ $view = Views::getView('test_filter_in_operator_ui');
+ $row['row[type]'] = 'fields';
+ $this->drupalPostForm('admin/structure/views/nojs/display/test_filter_in_operator_ui/default/row', $row, t('Apply'));
+ $field['name[node_field_data.nid]'] = TRUE;
+ $this->drupalPostForm('admin/structure/views/nojs/add-handler/test_filter_in_operator_ui/default/field', $field, t('Add and configure fields'));
+ $this->drupalPostForm('admin/structure/views/nojs/handler/test_filter_in_operator_ui/default/field/nid', [], t('Apply'));
+ $edit['options[value][all]'] = TRUE;
+ $edit['options[value][article]'] = TRUE;
+ $edit['options[value][page]'] = TRUE;
+ $this->drupalPostForm('admin/structure/views/nojs/handler/test_filter_in_operator_ui/default/filter/type', $edit, t('Apply'));
+ $this->drupalPostForm('admin/structure/views/view/test_filter_in_operator_ui/edit/default', [], t('Save'));
+ $this->drupalPostForm(NULL, [], t('Update preview'));
+ $this->assertNoText('An illegal choice has been detected.');
+ }
+
+}