41bb46c (HEAD, 2226493) first test fixes
diff --git a/core/modules/comment/lib/Drupal/comment/Tests/CommentLanguageTest.php b/core/modules/comment/lib/Drupal/comment/Tests/CommentLanguageTest.php
index 56444a9..e6f963c 100644
--- a/core/modules/comment/lib/Drupal/comment/Tests/CommentLanguageTest.php
+++ b/core/modules/comment/lib/Drupal/comment/Tests/CommentLanguageTest.php
@@ -97,7 +97,7 @@ function testCommentLanguage() {
       $edit = array(
         'title[0][value]' => $title,
         'body[0][value]' => $this->randomName(),
-        'langcode' => $node_langcode,
+        'langcode[0][value]' => $node_langcode,
         'comment[0][status]' => CommentItemInterface::OPEN,
       );
       $this->drupalPostForm("node/add/article", $edit, t('Save'));
diff --git a/core/modules/forum/lib/Drupal/forum/Tests/ForumBlockTest.php b/core/modules/forum/lib/Drupal/forum/Tests/ForumBlockTest.php
index 3799288..a1fbfe3 100644
--- a/core/modules/forum/lib/Drupal/forum/Tests/ForumBlockTest.php
+++ b/core/modules/forum/lib/Drupal/forum/Tests/ForumBlockTest.php
@@ -174,8 +174,8 @@ protected function createForumTopics($count = 5) {
         'body[0][value]' => $body,
         // Forum posts are ordered by timestamp, so force a unique timestamp by
         // adding the index.
-        'created[date]' => $date->format('Y-m-d'),
-        'created[time]' => $date->format('H:i:s'),
+        'created[0][value][date]' => $date->format('Y-m-d'),
+        'created[0][value][time]' => $date->format('H:i:s'),
       );
 
       // Create the forum topic, preselecting the forum ID via a URL parameter.
diff --git a/core/modules/locale/lib/Drupal/locale/Tests/LocaleContentTest.php b/core/modules/locale/lib/Drupal/locale/Tests/LocaleContentTest.php
index 093da50..5260b5d 100644
--- a/core/modules/locale/lib/Drupal/locale/Tests/LocaleContentTest.php
+++ b/core/modules/locale/lib/Drupal/locale/Tests/LocaleContentTest.php
@@ -104,7 +104,7 @@ function testContentTypeLanguageConfiguration() {
     // Verify language selection appears on the node add form.
     $this->drupalGet("node/add/{$type2->type}");
     // Verify language select list is present.
-    $this->assertFieldByName('langcode', NULL, 'Language select present on the node add form.');
+    $this->assertFieldByName('langcode[0][value]', NULL, 'Language select present on the node add form.');
     // Ensure language appears.
     $this->assertText($name, 'Language present.');
 
@@ -115,7 +115,7 @@ function testContentTypeLanguageConfiguration() {
       'type' => $type2->type,
       'title' => $node_title,
       'body' => array(array('value' => $node_body)),
-      'langcode' => $langcode,
+      'langcode[0][value]' => $langcode,
     );
     $node = $this->drupalCreateNode($edit);
     // Edit the content and ensure correct language is selected.
@@ -124,7 +124,7 @@ function testContentTypeLanguageConfiguration() {
     $this->assertRaw('<option value="' . $langcode . '" selected="selected">' .  $name . '</option>', 'Correct language selected.');
     // Ensure we can change the node language.
     $edit = array(
-      'langcode' => 'en',
+      'langcode[0][value]' => 'en',
     );
     $this->drupalPostForm($path, $edit, t('Save'));
     $this->assertRaw(t('%title has been updated.', array('%title' => $node_title)));
diff --git a/core/modules/node/lib/Drupal/node/Tests/NodeCreationTest.php b/core/modules/node/lib/Drupal/node/Tests/NodeCreationTest.php
index c5b4514..52867e8 100644
--- a/core/modules/node/lib/Drupal/node/Tests/NodeCreationTest.php
+++ b/core/modules/node/lib/Drupal/node/Tests/NodeCreationTest.php
@@ -149,7 +149,7 @@ public function testAuthorAutocomplete() {
 
     $this->drupalGet('node/add/page');
 
-    $result = $this->xpath('//input[@id="edit-uid" and contains(@data-autocomplete-path, "user/autocomplete")]');
+    $result = $this->xpath('//input[@id="edit-uid-0-value" and contains(@data-autocomplete-path, "user/autocomplete")]');
     $this->assertEqual(count($result), 0, 'No autocompletion without access user profiles.');
 
     $admin_user = $this->drupalCreateUser(array('administer nodes', 'create page content', 'access user profiles'));
@@ -157,7 +157,7 @@ public function testAuthorAutocomplete() {
 
     $this->drupalGet('node/add/page');
 
-    $result = $this->xpath('//input[@id="edit-uid" and contains(@data-autocomplete-path, "user/autocomplete")]');
+    $result = $this->xpath('//input[@id="edit-uid-0-value" and contains(@data-autocomplete-path, "user/autocomplete")]');
     $this->assertEqual(count($result), 1, 'Ensure that the user does have access to the autocompletion');
   }
 
diff --git a/core/modules/node/lib/Drupal/node/Tests/NodeTranslationUITest.php b/core/modules/node/lib/Drupal/node/Tests/NodeTranslationUITest.php
index 7ed9f14..c1c86af 100644
--- a/core/modules/node/lib/Drupal/node/Tests/NodeTranslationUITest.php
+++ b/core/modules/node/lib/Drupal/node/Tests/NodeTranslationUITest.php
@@ -88,7 +88,7 @@ protected function createEntity($values, $langcode, $bundle_name = NULL) {
     $edit = array(
       'title[0][value]' => $values['title'][0]['value'],
       "{$this->fieldName}[0][value]" => $values[$this->fieldName][0]['value'],
-      'langcode' => $langcode,
+      'langcode[0][value]' => $langcode,
     );
     $this->drupalPostForm('node/add/article', $edit,t('Save and publish'));
     $this->drupalLogin($this->translator);
@@ -176,7 +176,7 @@ function testTranslateLinkContentAdminPage() {
     $this->drupalLogin($this->administrator);
 
     $page = $this->drupalCreateNode(array('type' => 'page'));
-    $article = $this->drupalCreateNode(array('type' => 'article', 'langcode' => $this->langcodes[0]));
+    $article = $this->drupalCreateNode(array('type' => 'article', 'langcode[0][value]' => $this->langcodes[0]));
 
     // Verify translation links.
     $this->drupalGet('admin/content');
@@ -191,7 +191,7 @@ function testTranslateLinkContentAdminPage() {
   function testFieldTranslationForm() {
     $this->drupalLogin($this->administrator);
 
-    $article = $this->drupalCreateNode(array('type' => 'article', 'langcode' => 'en'));
+    $article = $this->drupalCreateNode(array('type' => 'article', 'langcode[0][value]' => 'en'));
 
     // Visit translation page.
     $this->drupalGet('node/' . $article->id() . '/translations');
diff --git a/core/modules/node/lib/Drupal/node/Tests/PageEditTest.php b/core/modules/node/lib/Drupal/node/Tests/PageEditTest.php
index 2361d13..3f30649 100644
--- a/core/modules/node/lib/Drupal/node/Tests/PageEditTest.php
+++ b/core/modules/node/lib/Drupal/node/Tests/PageEditTest.php
@@ -114,21 +114,21 @@ function testPageAuthoredBy() {
 
     // Try to change the 'authored by' field to an invalid user name.
     $edit = array(
-      'uid' => 'invalid-name',
+      'uid[0][value]' => 'invalid-name',
     );
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save and keep published'));
     $this->assertText('The username invalid-name does not exist.');
 
     // Change the authored by field to an empty string, which should assign
     // authorship to the anonymous user (uid 0).
-    $edit['uid'] = '';
+    $edit['uid[0][value]'] = '';
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save and keep published'));
     $node = node_load($node->id(), TRUE);
     $this->assertIdentical($node->getOwnerId(), '0', 'Node authored by anonymous user.');
 
     // Change the authored by field to another user's name (that is not
     // logged in).
-    $edit['uid'] = $this->web_user->getUsername();
+    $edit['uid[0][value]'] = $this->web_user->getUsername();
     $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save and keep published'));
     $node = node_load($node->id(), TRUE);
     $this->assertIdentical($node->getOwnerId(), $this->web_user->id(), 'Node authored by normal user.');
@@ -136,6 +136,6 @@ function testPageAuthoredBy() {
     // Check that normal users cannot change the authored by information.
     $this->drupalLogin($this->web_user);
     $this->drupalGet('node/' . $node->id() . '/edit');
-    $this->assertNoFieldByName('uid');
+    $this->assertNoFieldByName('uid[0][value]');
   }
 }
diff --git a/core/modules/node/lib/Drupal/node/Tests/PagePreviewTest.php b/core/modules/node/lib/Drupal/node/Tests/PagePreviewTest.php
index 48a8ea6..4a6cebe 100644
--- a/core/modules/node/lib/Drupal/node/Tests/PagePreviewTest.php
+++ b/core/modules/node/lib/Drupal/node/Tests/PagePreviewTest.php
@@ -192,7 +192,7 @@ function testPagePreviewWithRevisions() {
     $edit[$title_key] = $this->randomName(8);
     $edit[$body_key] = $this->randomName(16);
     $edit[$term_key] = $this->term->id();
-    $edit['log'] = $this->randomName(32);
+    $edit['log[0][value]'] = $this->randomName(32);
     $this->drupalPostForm('node/add/page', $edit, t('Preview'));
 
     // Check that the preview is displaying the title, body and term.
@@ -207,7 +207,7 @@ function testPagePreviewWithRevisions() {
     $this->assertFieldByName($term_key, $edit[$term_key], 'Term field displayed.');
 
     // Check that the log field has the correct value.
-    $this->assertFieldByName('log', $edit['log'], 'Log field displayed.');
+    $this->assertFieldByName('log[0][value]', $edit['log[0][value]'], 'Log field displayed.');
   }
 
 }
diff --git a/core/modules/taxonomy/lib/Drupal/taxonomy/Tests/LegacyTest.php b/core/modules/taxonomy/lib/Drupal/taxonomy/Tests/LegacyTest.php
index cddfefd..37a1f53 100644
--- a/core/modules/taxonomy/lib/Drupal/taxonomy/Tests/LegacyTest.php
+++ b/core/modules/taxonomy/lib/Drupal/taxonomy/Tests/LegacyTest.php
@@ -38,8 +38,8 @@ function testTaxonomyLegacyNode() {
     $date = new DrupalDateTime('1969-01-01 00:00:00');
     $edit = array();
     $edit['title[0][value]'] = $this->randomName();
-    $edit['created[date]'] = $date->format('Y-m-d');
-    $edit['created[time]'] = $date->format('H:i:s');
+    $edit['created[0][value][date]'] = $date->format($date_format);
+    $edit['created[0][value][time]'] = $date->format($time_format);
     $edit['body[0][value]'] = $this->randomName();
     $edit['field_tags'] = $this->randomName();
     $this->drupalPostForm('node/add/article', $edit, t('Save and publish'));