Checks the node preview functionality.
function testPagePreview() {
$langcode = Language::LANGCODE_NOT_SPECIFIED;
$title_key = "title";
$body_key = "body[{$langcode}][0][value]";
$term_key = "{$this->field_name}[{$langcode}]";
// Fill in node creation form and preview node.
$edit = array();
$edit[$title_key] = $this
->randomName(8);
$edit[$body_key] = $this
->randomName(16);
$edit[$term_key] = $this->term
->label();
$this
->drupalPost('node/add/page', $edit, t('Preview'));
// Check that the preview is displaying the title, body and term.
$this
->assertTitle(t('Preview | Drupal'), 'Basic page title is preview.');
$this
->assertText($edit[$title_key], 'Title displayed.');
$this
->assertText($edit[$body_key], 'Body displayed.');
$this
->assertText($edit[$term_key], 'Term displayed.');
// Check that the title, body and term fields are displayed with the
// correct values.
$this
->assertFieldByName($title_key, $edit[$title_key], 'Title field displayed.');
$this
->assertFieldByName($body_key, $edit[$body_key], 'Body field displayed.');
$this
->assertFieldByName($term_key, $edit[$term_key], 'Term field displayed.');
// Save the node.
$this
->drupalPost('node/add/page', $edit, t('Save'));
$node = $this
->drupalGetNodeByTitle($edit[$title_key]);
// Check the term was displayed on the saved node.
$this
->drupalGet('node/' . $node->nid);
$this
->assertText($edit[$term_key], 'Term displayed.');
// Check the term appears again on the edit form.
$this
->drupalGet('node/' . $node->nid . '/edit');
$this
->assertFieldByName($term_key, $edit[$term_key], 'Term field displayed.');
// Check with two new terms on the edit form, additionally to the existing
// one.
$edit = array();
$newterm1 = $this
->randomName(8);
$newterm2 = $this
->randomName(8);
$edit[$term_key] = $this->term
->label() . ', ' . $newterm1 . ', ' . $newterm2;
$this
->drupalPost('node/' . $node->nid . '/edit', $edit, t('Preview'));
$this
->assertRaw('>' . $newterm1 . '<', 'First new term displayed.');
$this
->assertRaw('>' . $newterm2 . '<', 'Second new term displayed.');
// The first term should be displayed as link, the others not.
$this
->assertLink($this->term
->label());
$this
->assertNoLink($newterm1);
$this
->assertNoLink($newterm2);
$this
->drupalPost('node/add/page', $edit, t('Save'));
// Check with one more new term, keeping old terms, removing the existing
// one.
$edit = array();
$newterm3 = $this
->randomName(8);
$edit[$term_key] = $newterm1 . ', ' . $newterm3 . ', ' . $newterm2;
$this
->drupalPost('node/' . $node->nid . '/edit', $edit, t('Preview'));
$this
->assertRaw('>' . $newterm1 . '<', 'First existing term displayed.');
$this
->assertRaw('>' . $newterm2 . '<', 'Second existing term displayed.');
$this
->assertRaw('>' . $newterm3 . '<', 'Third new term displayed.');
$this
->assertNoText($this->term
->label());
$this
->assertNoLink($newterm1);
$this
->assertNoLink($newterm2);
$this
->assertNoLink($newterm3);
$this
->drupalPost('node/add/page', $edit, t('Save'));
}