--- /dev/null
+<?php
+
+namespace Drupal\Tests\views\Kernel\Plugin;
+
+use Drupal\views\Views;
+
+/**
+ * Tests mapping style functionality.
+ *
+ * @group views
+ */
+class StyleMappingTest extends StyleTestBase {
+
+ public static $modules = ['system'];
+
+ /**
+ * Views used by this test.
+ *
+ * @var array
+ */
+ public static $testViews = ['test_style_mapping'];
+
+ /**
+ * Verifies that the fields were mapped correctly.
+ */
+ public function testMappedOutput() {
+ $view = Views::getView('test_style_mapping');
+ $output = $this->mappedOutputHelper($view);
+ $this->assertTrue(strpos($output, 'job') === FALSE, 'The job field is added to the view but not in the mapping.');
+ $view->destroy();
+
+ $view->setDisplay();
+ $view->displayHandlers->get('default')->options['style']['options']['mapping']['name_field'] = 'job';
+ $output = $this->mappedOutputHelper($view);
+ $this->assertTrue(strpos($output, 'job') !== FALSE, 'The job field is added to the view and is in the mapping.');
+ }
+
+ /**
+ * Tests the mapping of fields.
+ *
+ * @param \Drupal\views\ViewExecutable $view
+ * The view to test.
+ *
+ * @return string
+ * The view rendered as HTML.
+ */
+ protected function mappedOutputHelper($view) {
+ $output = $view->preview();
+ $rendered_output = \Drupal::service('renderer')->renderRoot($output);
+ $this->storeViewPreview($rendered_output);
+ $rows = $this->elements->body->div->div;
+ $data_set = $this->dataSet();
+
+ $count = 0;
+ foreach ($rows as $row) {
+ $attributes = $row->attributes();
+ $class = (string) $attributes['class'][0];
+ $this->assertTrue(strpos($class, 'views-row-mapping-test') !== FALSE, 'Make sure that each row has the correct CSS class.');
+
+ foreach ($row->div as $field) {
+ // Split up the field-level class, the first part is the mapping name
+ // and the second is the field ID.
+ $field_attributes = $field->attributes();
+ $name = strtok((string) $field_attributes['class'][0], '-');
+ $field_id = strtok('-');
+
+ // The expected result is the mapping name and the field value,
+ // separated by ':'.
+ $expected_result = $name . ':' . $data_set[$count][$field_id];
+ $actual_result = (string) $field;
+ $this->assertIdentical($expected_result, $actual_result, format_string('The fields were mapped successfully: %name => %field_id', ['%name' => $name, '%field_id' => $field_id]));
+ }
+
+ $count++;
+ }
+
+ return $rendered_output;
+ }
+
+}