only in patch2:
unchanged:
--- /dev/null
+++ b/tests/src/Functional/Plugin/Field/FieldFormatter/FeedsItemTargetEntityFormatterTest.php
@@ -0,0 +1,74 @@
+<?php
+
+namespace Drupal\Tests\feeds\Functional\Plugin\Field\FieldFormatter;
+
+/**
+ * Tests feeds_item_target_entity_view field formatter.
+ *
+ * @group feeds
+ */
+class FeedsItemTargetEntityFormatterTest extends FeedsItemFormatterTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    // Set display mode for feeds_item to feeds_item_target_entity_view on
+    // article content type.
+    entity_get_display('node', 'article', 'default')
+      ->setComponent('feeds_item', [
+        'type' => 'feeds_item_target_entity_view',
+        'weight' => 1,
+      ])
+      ->save();
+  }
+
+  /**
+   * Tests the feeds target entity view formatter.
+   *
+   * @covers \Drupal\feeds\Plugin\Field\FieldFormatter\FeedsItemTargetEntityFormatter::viewElements
+   */
+  public function testFeedsItemTargetEntityFormatter($input, $expected) {
+    $feed = $this->getFeed();
+
+    // :TODO: We need to set predictable values for items imported, last import,
+    // next import on the feed. We used /csv/content.csv for source as
+    // FeedsItemFormatterTestBase sets that up but maybe we should define that
+    // separately here too to make this test more clear. Also I think we need to
+    // set a display mode on the feed item itself for this to work well.
+
+    // Setup the article with test guid.
+    $settings['title'] = "Teenage Mutant Ninja Turtles";
+    $article = $this->createNodeWithFeedsItem($feed, $settings);
+    $article->feeds_item = $feed;
+
+    // Display the article and test we are getting correct output for target id.
+    $display = entity_get_display($article->getEntityTypeId(), $article->bundle(), 'default');
+    $content = $display->build($article);
+    $rendered_content = \Drupal::service('renderer')->renderRoot($content);
+
+    // Make sure all fields of the target feed item are rendering as expected.
+    $this->assertContains('<div class="field__item">' . $feed->source . '</div>', (string) $rendered_content);
+    // :TODO: Figure out how to test the following fields displaying for the
+    // target feed.
+    // 1) Items imported: 10
+    // 2) Last import: 3 months ago
+    // 3) Next import: Wed, 12/31/1969 - 15:59
+
+  }
+
+  /**
+   * Provides the feed ids to check and expected results.
+   */
+  public function providerTargetIds() {
+    return [
+      'empty target id' => ['', NULL],
+      'existing target id' => ['1', '<div class="field__item">1</div>'],
+      'non existing target id' => ['123', NULL],
+      'weird html string target id' => ['<em>Skeletor!!!!</em>', NULL],
+    ];
+  }
+
+}
only in patch2:
unchanged:
--- /dev/null
+++ b/tests/src/Functional/Plugin/Field/FieldFormatter/FeedsItemTargetLabelFormatterTest.php
@@ -0,0 +1,68 @@
+<?php
+
+namespace Drupal\Tests\feeds\Functional\Plugin\Field\FieldFormatter;
+
+/**
+ * Tests feeds_item_target_id field formatter.
+ *
+ * @group feeds
+ */
+class FeedsItemTargetIdFormatterTest extends FeedsItemFormatterTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    // Set display mode for feeds_item to feeds_item_target on article content
+    // type.
+    entity_get_display('node', 'article', 'default')
+      ->setComponent('feeds_item', [
+        'type' => 'feeds_item_target_id',
+        'weight' => 1,
+      ])
+      ->save();
+  }
+
+  /**
+   * Tests the feeds target id formatter.
+   *
+   * @covers \Drupal\feeds\Plugin\Field\FieldFormatter\FeedsItemTargetIdFormatter::viewElements
+   *
+   * @dataProvider providerTargetIds
+   */
+  public function testFeedsItemTargetIdFormatter($input, $expected) {
+    $feed = $this->getFeed();
+
+    // Setup the article with test guid.
+    $settings['title'] = "He-Man and the Masters of the Universe";
+    $article = $this->createNodeWithFeedsItem($feed, $settings);
+    $article->feeds_item->target_id = $input;
+
+    // Display the article and test we are getting correct output for target id.
+    $display = entity_get_display($article->getEntityTypeId(), $article->bundle(), 'default');
+    $content = $display->build($article);
+    $rendered_content = \Drupal::service('renderer')->renderRoot($content);
+    if ($expected) {
+      $this->assertContains($expected, (string) $rendered_content);
+    }
+    else {
+      // Make sure no field item is rendered with empty input.
+      $this->assertFeedsItemFieldNotDisplayed($rendered_content, $input);
+    }
+  }
+
+  /**
+   * Provides the feed ids to check and expected results.
+   */
+  public function providerTargetIds() {
+    return [
+      'empty target id' => ['', NULL],
+      'existing target id' => ['1', '<div class="field__item">1</div>'],
+      'non existing target id' => ['123', NULL],
+      'weird html string target id' => ['<em>Skeletor!!!!</em>', NULL],
+    ];
+  }
+
+}