FIX: Changes to support php7 and new DBFields

These changes are necessary for CMS to work with this API breakage:
https://github.com/silverstripe/silverstripe-framework/pull/4551

.travis.yml

@@ -30,6 +30,8 @@ matrix:
       env: DB=MYSQL PDO=1
     - php: 5.6
       env: DB=MYSQL BEHAT_TEST=1
+    - php: 7.0
+      env: DB=MYSQL PDO=1
 
 before_script:
  - composer self-update || true

code/controllers/ContentController.php

@@ -1,4 +1,8 @@
 <?php
+
+use SilverStripe\Model\FieldType\DBVarchar;
+use SilverStripe\Model\FieldType\DBHTMLText;
+
 /**
  * The most common kind of controller; effectively a controller linked to a {@link DataObject}.
  *
@@ -413,8 +417,8 @@ HTML;
 	public function deleteinstallfiles() {
 		if(!Permission::check("ADMIN")) return Security::permissionFailure($this);
 
-		$title = new Varchar("Title");
-		$content = new HTMLText('Content');
+		$title = new DBVarchar("Title");
+		$content = new DBHTMLText('Content');
 
 		// We can't delete index.php as it might be necessary for URL routing without mod_rewrite.
 		// There's no safe way to detect usage of mod_rewrite across webservers,

code/model/SiteTreeLinkTracking.php

@@ -5,6 +5,8 @@
  * @subpackage model
  */
 
+use SilverStripe\Model\FieldType\DBHTMLText;
+
 /**
  * Adds tracking of links in any HTMLText fields which reference SiteTree or File items.
  *
@@ -205,11 +207,9 @@ class SiteTreeLinkTracking extends DataExtension {
 		$allFields = $this->owner->db();
 		$htmlFields = array();
 		foreach($allFields as $field => $fieldSpec) {
-			if(preg_match('/([^(]+)/', $fieldSpec, $matches)) {
-				$class = $matches[0];
-				if(class_exists($class)){
-					if($class == 'HTMLText' || is_subclass_of($class, 'HTMLText')) $htmlFields[] = $field;
-				}
+			$fieldObj = $this->owner->dbObject($field);
+			if($fieldObj instanceof DBHTMLText) {
+				$htmlFields[] = $field;
 			}
 		}
 

tests/model/VirtualPageTest.php

@@ -1,5 +1,7 @@
 <?php
 
+use SilverStripe\Model\FieldType\DBVarchar;
+
 class VirtualPageTest extends FunctionalTest {
 	protected static $fixture_file = 'VirtualPageTest.yml';
 	protected static $use_draft_site = false;
@@ -618,7 +620,7 @@ class VirtualPageTest_NotRoot extends Page implements TestOnly {
 	private static $can_be_root = false;
 }
 
-class VirtualPageTest_TestDBField extends Varchar implements TestOnly {
+class VirtualPageTest_TestDBField extends DBVarchar implements TestOnly {
 	public function forTemplate() {
 		return strtoupper($this->XML());
 	}