REFACTOR PHP 8 and PHPUnit 9 compatability (#209)

* remove unnecessary requirements

.github/workflows/ci.yml

@@ -32,8 +32,9 @@ jobs:
       fail-fast: false
       matrix:
         php-version:
-          - "7.3"
           - "7.4"
+          - "8.0"
+          - "8.1"
 
     steps:
       - name: "Checkout"

composer.json

@@ -19,14 +19,12 @@
 	"license": "BSD-3-Clause",
 	"type": "silverstripe-vendormodule",
 	"require": {
-		"silverstripe/recipe-cms": "^1.0 || ^4.0",
-		"silverstripe/asset-admin": "^1.0",
-		"silverstripe/vendor-plugin": "^1.0",
+		"silverstripe/recipe-cms": "^4.0",
 		"dynamic/silverstripe-linkable": "^1.0",
 		"symbiote/silverstripe-gridfieldextensions": "^3.0"
 	},
 	"require-dev": {
-		"phpunit/phpunit": "^5.7",
+        "silverstripe/recipe-testing": "^2",
 		"squizlabs/php_codesniffer": "^3.0"
 	},
 	"autoload": {

tests/SlideImageTest.php

@@ -48,7 +48,7 @@ public function testValidateName()
         $object = $this->objFromFixture(SlideImage::class, 'slide1');
         $object->Name = '';
         $object->ImageID = 1;
-        $this->setExpectedException(ValidationException::class);
+        $this->expectException(ValidationException::class);
         $object->write();
 
         $object->Name = 'Foo';
@@ -62,7 +62,7 @@ public function testValidateImage()
     {
         $object = $this->objFromFixture(SlideImage::class, 'slide1');
         $object->ImageID = null;
-        $this->setExpectedException(ValidationException::class);
+        $this->expectException(ValidationException::class);
         $object->write();
 
         $base->ImageID = 1;
@@ -76,7 +76,7 @@ public function testValidateVideo()
     {
         $object = $this->objFromFixture(SlideImage::class, 'slide2');
         $object->VideoID = null;
-        $this->setExpectedException(ValidationException::class);
+        $this->expectException(ValidationException::class);
         $object->write();
 
         $object->VideoID = 1;
@@ -92,7 +92,7 @@ public function testValidateText()
         $description = $object->Description;
 
         $object->Description = null;
-        $this->setExpectedException(ValidationException::class);
+        $this->expectException(ValidationException::class);
         $object->write();
 
         $object->Description = $description;