Squiz/CSS/ShorthandSize: move parse error test to its own file

src/Standards/Squiz/Tests/CSS/ShorthandSizeUnitTest.css → src/Standards/Squiz/Tests/CSS/ShorthandSizeUnitTest.1.css

@@ -39,7 +39,3 @@
         2px /* phpcs:disable Standard.Category.SniffName -- for reasons */
         4px;
 }
-
-/* Intentional parse error. Live coding resilience. This has to be the last test in the file. */
-#live-coding {
-    margin: 8px 8px 8px 8px

src/Standards/Squiz/Tests/CSS/ShorthandSizeUnitTest.css.fixed → src/Standards/Squiz/Tests/CSS/ShorthandSizeUnitTest.1.css.fixed

@@ -35,7 +35,3 @@
         2px /* phpcs:disable Standard.Category.SniffName -- for reasons */
         4px;
 }
-
-/* Intentional parse error. Live coding resilience. This has to be the last test in the file. */
-#live-coding {
-    margin: 8px 8px 8px 8px

src/Standards/Squiz/Tests/CSS/ShorthandSizeUnitTest.2.css

@@ -0,0 +1,3 @@
+/* Intentional parse error. Live coding resilience. */
+#live-coding {
+    margin: 8px 8px 8px 8px

src/Standards/Squiz/Tests/CSS/ShorthandSizeUnitTest.php

@@ -26,22 +26,30 @@ final class ShorthandSizeUnitTest extends AbstractSniffUnitTest
      * The key of the array should represent the line number and the value
      * should represent the number of errors that should occur on that line.
      *
+     * @param string $testFile The name of the file being tested.
+     *
      * @return array<int, int>
      */
-    public function getErrorList()
+    public function getErrorList($testFile='')
     {
-        return [
-            8  => 1,
-            9  => 1,
-            10 => 1,
-            11 => 1,
-            12 => 1,
-            13 => 1,
-            15 => 1,
-            16 => 1,
-            17 => 1,
-            21 => 1,
-        ];
+        switch ($testFile) {
+        case 'ShorthandSizeUnitTest.1.css':
+            return [
+                8  => 1,
+                9  => 1,
+                10 => 1,
+                11 => 1,
+                12 => 1,
+                13 => 1,
+                15 => 1,
+                16 => 1,
+                17 => 1,
+                21 => 1,
+            ];
+
+        default:
+            return [];
+        }//end switch
 
     }//end getErrorList()