Checks block edit functionality.
public function testPageEdit() {
$this
->drupalLogin($this->adminUser);
$langcode = Language::LANGCODE_NOT_SPECIFIED;
$title_key = 'info';
$body_key = "block_body[{$langcode}][0][value]";
// Create block to edit.
$edit = array();
$edit['info'] = drupal_strtolower($this
->randomName(8));
$edit[$body_key] = $this
->randomName(16);
$this
->drupalPost('block/add/basic', $edit, t('Save'));
// Check that the block exists in the database.
$blocks = \Drupal::entityQuery('custom_block')
->condition('info', $edit['info'])
->execute();
$block = entity_load('custom_block', reset($blocks));
$this
->assertTrue($block, 'Custom block found in database.');
// Load the edit page.
$this
->drupalGet('block/' . $block
->id() . '/edit');
$this
->assertFieldByName($title_key, $edit[$title_key], 'Title field displayed.');
$this
->assertFieldByName($body_key, $edit[$body_key], 'Body field displayed.');
// Edit the content of the block.
$edit = array();
$edit[$title_key] = $this
->randomName(8);
$edit[$body_key] = $this
->randomName(16);
// Stay on the current page, without reloading.
$this
->drupalPost(NULL, $edit, t('Save'));
// Edit the same block, creating a new revision.
$this
->drupalGet("block/" . $block
->id() . "/edit");
$edit = array();
$edit['info'] = $this
->randomName(8);
$edit[$body_key] = $this
->randomName(16);
$edit['revision'] = TRUE;
$this
->drupalPost(NULL, $edit, t('Save'));
// Ensure that the block revision has been created.
$revised_block = entity_load('custom_block', $block->id->value, TRUE);
$this
->assertNotIdentical($block->revision_id->value, $revised_block->revision_id->value, 'A new revision has been created.');
// Test deleting the block.
$this
->drupalGet("block/" . $revised_block
->id() . "/edit");
$this
->drupalPost(NULL, array(), t('Delete'));
$this
->assertText(format_string('Are you sure you want to delete !label?', array(
'!label' => $revised_block
->label(),
)));
}