--- /dev/null
+<?php
+
+namespace Drupal\Tests\field\Kernel\Plugin\migrate\source\d7;
+
+use Drupal\Tests\migrate\Kernel\MigrateSqlSourceTestBase;
+
+/**
+ * Tests D7 field instance per view mode source plugin.
+ *
+ * @covers \Drupal\field\Plugin\migrate\source\d7\FieldInstancePerViewMode
+ * @group field
+ */
+class FieldInstancePerViewModeTest extends MigrateSqlSourceTestBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public static $modules = ['field', 'migrate_drupal'];
+
+ /**
+ * {@inheritdoc}
+ */
+ public function providerSource() {
+ $tests = [
+ [
+ 'source_data' => [],
+ 'expected_data' => [],
+ ],
+ ];
+
+ // The source data.
+ $tests[0]['source_data']['field_config_instance'] = [
+ [
+ 'id' => '2',
+ 'field_id' => '2',
+ 'field_name' => 'body',
+ 'entity_type' => 'node',
+ 'bundle' => 'page',
+ 'data' => 'a:6:{s:5:"label";s:4:"Body";s:6:"widget";a:4:{s:4:"type";s:26:"text_textarea_with_summary";s:8:"settings";a:2:{s:4:"rows";i:20;s:12:"summary_rows";i:5;}s:6:"weight";i:-4;s:6:"module";s:4:"text";}s:8:"settings";a:3:{s:15:"display_summary";b:1;s:15:"text_processing";i:1;s:18:"user_register_form";b:0;}s:7:"display";a:2:{s:7:"default";a:5:{s:5:"label";s:6:"hidden";s:4:"type";s:12:"text_default";s:8:"settings";a:0:{}s:6:"module";s:4:"text";s:6:"weight";i:0;}s:6:"teaser";a:5:{s:5:"label";s:6:"hidden";s:4:"type";s:23:"text_summary_or_trimmed";s:8:"settings";a:1:{s:11:"trim_length";i:600;}s:6:"module";s:4:"text";s:6:"weight";i:0;}}s:8:"required";b:0;s:11:"description";s:0:"";}',
+ 'deleted' => '0',
+ ],
+ ];
+
+ $tests[0]['source_data']['field_config'] = [
+ [
+ 'id' => '2',
+ 'field_name' => 'body',
+ 'type' => 'text_with_summary',
+ 'module' => 'text',
+ 'active' => '1',
+ 'storage_type' => 'field_sql_storage',
+ 'storage_module' => 'field_sql_storage',
+ 'storage_active' => '1',
+ 'locked' => '0',
+ 'data' => 'a:7:{s:12:"entity_types";a:1:{i:0;s:4:"node";}s:7:"indexes";a:1:{s:6:"format";a:1:{i:0;s:6:"format";}}s:8:"settings";a:0:{}s:12:"translatable";i:0;s:12:"foreign keys";a:1:{s:6:"format";a:2:{s:5:"table";s:13:"filter_format";s:7:"columns";a:1:{s:6:"format";s:6:"format";}}}s:7:"storage";a:4:{s:4:"type";s:17:"field_sql_storage";s:8:"settings";a:0:{}s:6:"module";s:17:"field_sql_storage";s:6:"active";s:1:"1";}s:2:"id";s:2:"25";}',
+ 'cardinality' => '1',
+ 'translatable' => '0',
+ 'deleted' => '0',
+ ],
+ ];
+
+ // The expected results.
+ $tests[0]['expected_data'] = [
+ [
+ 'entity_type' => 'node',
+ 'bundle' => 'page',
+ 'field_name' => 'body',
+ 'label' => 'hidden',
+ 'type' => 'text_with_summary',
+ 'formatter_type' => 'text_default',
+ 'settings' => [],
+ 'module' => 'text',
+ 'weight' => 0,
+ 'view_mode' => 'default',
+ ],
+ [
+ 'entity_type' => 'node',
+ 'bundle' => 'page',
+ 'field_name' => 'body',
+ 'label' => 'hidden',
+ 'type' => 'text_with_summary',
+ 'formatter_type' => 'text_summary_or_trimmed',
+ 'settings' => [
+ 'trim_length' => 600,
+ ],
+ 'module' => 'text',
+ 'weight' => 0,
+ 'view_mode' => 'teaser',
+ ],
+ ];
+
+ return $tests;
+ }
+
+}