--- /dev/null
+<?php
+
+namespace Drupal\Tests\image\Kernel\Plugin\migrate\source\d7;
+
+use Drupal\Tests\migrate\Kernel\MigrateSqlSourceTestBase;
+
+/**
+ * Tests the D7 ImageStyles source plugin.
+ *
+ * @covers \Drupal\image\Plugin\migrate\source\d7\ImageStyles
+ *
+ * @group image
+ */
+class ImageStylesTest extends MigrateSqlSourceTestBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public static $modules = ['image', 'migrate_drupal'];
+
+ /**
+ * {@inheritdoc}
+ */
+ public function providerSource() {
+ $tests = [];
+
+ // The source data.
+ $tests[0]['source_data']['image_styles'] = [
+ [
+ 'isid' => 1,
+ 'name' => 'custom_image_style_1',
+ 'label' => 'Custom image style 1',
+ ],
+ ];
+ $tests[0]['source_data']['image_effects'] = [
+ [
+ 'ieid' => 1,
+ 'isid' => 1,
+ 'weight' => 1,
+ 'name' => 'image_desaturate',
+ 'data' => serialize([]),
+ ],
+ ];
+
+ // The expected results.
+ $tests[0]['expected_data'] = [
+ [
+ 'isid' => 1,
+ 'name' => 'custom_image_style_1',
+ 'label' => 'Custom image style 1',
+ 'effects' => [
+ [
+ 'ieid' => 1,
+ 'isid' => 1,
+ 'weight' => 1,
+ 'name' => 'image_desaturate',
+ 'data' => [],
+ ],
+ ],
+ ],
+ ];
+
+ return $tests;
+ }
+
+}