Merge pull request silverstripe#980 from creative-commoners/pulls/4/t…

…est-preview-block

MNT Add behat test for previewing elemental blocks

tests/Behat/features/preview-a-block.feature

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+Feature: Preview a non-inline-editable block
+  As an author
+  I want to preview the parent page of the non-inline-editable block I'm editing in the CMS
+  So that I can see how it would look like to my visitors
+
+  Background:
+    Given I add an extension "DNADesign\Elemental\Extensions\ElementalPageExtension" to the "Page" class
+      And I add an extension "DNADesign\Elemental\Tests\Src\TestReplacePageContentExtension" to the "Page" class
+      And content blocks are not in-line editable
+      And a "page" "Preview Blocks Page" with a "Alice's Block" content element with "Alice's content" content
+
+    Given I am logged in with "ADMIN" permissions
+      And I go to "/admin/pages"
+      And I left click on "Preview Blocks Page" in the tree
+      And I set the CMS mode to "Edit mode"
+      And I press the "Publish" button
+      And I click on block 1
+
+  @javascript
+  Scenario: I can show a preview of the current block's page from the pages section
+    When I set the CMS mode to "Preview mode"
+    Then I can see the preview panel
+      And the preview contains "Alice's content"
+
+    Given I set the CMS mode to "Edit mode"
+
+  @javascript
+  Scenario: I can see an updated preview when editing inline-editable blocks
+    When I fill in "<p>New published content</p>" for the "Content" HTML field
+      And I press the "Publish" button
+      And I fill in "<p>New preview content</p>" for the "Content" HTML field
+      And I press the "Save" button
+      And I set the CMS mode to "Preview mode"
+
+    When I switch the preview to "Published"
+    Then the preview does not contain "New preview content"
+      And the preview contains "New published content"
+
+    When I switch the preview to "Draft"
+    Then the preview does not contain "New published content"
+      And the preview contains "New preview content"
+
+    Given I set the CMS mode to "Edit mode"

tests/Src/TestReplacePageContentExtension.php

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+<?php
+
+namespace DNADesign\Elemental\Tests\Src;
+
+use SilverStripe\Core\Extension;
+use SilverStripe\Dev\TestOnly;
+
+class TestReplacePageContentExtension extends Extension implements TestOnly
+{
+    public function getContent()
+    {
+        return $this->owner->ElementalArea;
+    }
+}