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diff --git a/web/core/modules/search/tests/src/Functional/SearchBlockTest.php b/web/core/modules/search/tests/src/Functional/SearchBlockTest.php
new file mode 100644
index 000000000..dd345f5d8
--- /dev/null
+++ b/web/core/modules/search/tests/src/Functional/SearchBlockTest.php
@@ -0,0 +1,109 @@
+<?php
+
+namespace Drupal\Tests\search\Functional;
+
+use Drupal\Tests\BrowserTestBase;
+
+/**
+ * Tests if the search form block is available.
+ *
+ * @group search
+ */
+class SearchBlockTest extends BrowserTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $modules = ['block', 'node', 'search', 'dblog'];
+
+  protected function setUp() {
+    parent::setUp();
+
+    // Create and log in user.
+    $admin_user = $this->drupalCreateUser(['administer blocks', 'search content']);
+    $this->drupalLogin($admin_user);
+  }
+
+  /**
+   * Test that the search form block can be placed and works.
+   */
+  public function testSearchFormBlock() {
+
+    // Test availability of the search block in the admin "Place blocks" list.
+    $this->drupalGet('admin/structure/block');
+    $this->getSession()->getPage()->findLink('Place block')->click();
+    $this->assertLinkByHref('/admin/structure/block/add/search_form_block/classy', 0,
+      'Did not find the search block in block candidate list.');
+
+    $block = $this->drupalPlaceBlock('search_form_block');
+
+    $this->drupalGet('');
+    $this->assertText($block->label(), 'Block title was found.');
+
+    // Check that name attribute is not empty.
+    $pattern = "//input[@type='submit' and @name='']";
+    $elements = $this->xpath($pattern);
+    $this->assertTrue(empty($elements), 'The search input field does not have empty name attribute.');
+
+    // Test a normal search via the block form, from the front page.
+    $terms = ['keys' => 'test'];
+    $this->drupalPostForm('', $terms, t('Search'));
+    $this->assertResponse(200);
+    $this->assertText('Your search yielded no results');
+
+    // Test a search from the block on a 404 page.
+    $this->drupalGet('foo');
+    $this->assertResponse(404);
+    $this->drupalPostForm(NULL, $terms, t('Search'));
+    $this->assertResponse(200);
+    $this->assertText('Your search yielded no results');
+
+    $visibility = $block->getVisibility();
+    $visibility['request_path']['pages'] = 'search';
+    $block->setVisibilityConfig('request_path', $visibility['request_path']);
+
+    $this->drupalPostForm('', $terms, t('Search'));
+    $this->assertResponse(200);
+    $this->assertText('Your search yielded no results');
+
+    // Confirm that the form submits to the default search page.
+    /** @var $search_page_repository \Drupal\search\SearchPageRepositoryInterface */
+    $search_page_repository = \Drupal::service('search.search_page_repository');
+    $entity_id = $search_page_repository->getDefaultSearchPage();
+    $this->assertEqual(
+      $this->getUrl(),
+      \Drupal::url('search.view_' . $entity_id, [], ['query' => ['keys' => $terms['keys']], 'absolute' => TRUE]),
+      'Submitted to correct URL.'
+    );
+
+    // Test an empty search via the block form, from the front page.
+    $terms = ['keys' => ''];
+    $this->drupalPostForm('', $terms, t('Search'));
+    $this->assertResponse(200);
+    $this->assertText('Please enter some keywords');
+
+    // Confirm that the user is redirected to the search page, when form is
+    // submitted empty.
+    $this->assertEqual(
+      $this->getUrl(),
+      \Drupal::url('search.view_' . $entity_id, [], ['query' => ['keys' => ''], 'absolute' => TRUE]),
+      'Redirected to correct URL.'
+    );
+
+    // Test that after entering a too-short keyword in the form, you can then
+    // search again with a longer keyword. First test using the block form.
+    $this->drupalPostForm('node', ['keys' => $this->randomMachineName(1)], t('Search'));
+    $this->assertText('You must include at least one keyword to match in the content', 'Keyword message is displayed when searching for short word');
+    $this->assertNoText(t('Please enter some keywords'), 'With short word entered, no keywords message is not displayed');
+    $this->drupalPostForm(NULL, ['keys' => $this->randomMachineName()], t('Search'), [], 'search-block-form');
+    $this->assertNoText('You must include at least one keyword to match in the content', 'Keyword message is not displayed when searching for long word after short word search');
+
+    // Same test again, using the search page form for the second search this
+    // time.
+    $this->drupalPostForm('node', ['keys' => $this->randomMachineName(1)], t('Search'));
+    $this->drupalPostForm(NULL, ['keys' => $this->randomMachineName()], t('Search'), [], 'search-form');
+    $this->assertNoText('You must include at least one keyword to match in the content', 'Keyword message is not displayed when searching for long word after short word search');
+
+  }
+
+}