PSR2/ClassDeclaration: add tests and remove some redundant code

src/Standards/PSR2/Sniffs/Classes/ClassDeclarationSniff.php

@@ -525,11 +525,8 @@ public function processClose(File $phpcsFile, $stackPtr)
             $ignoreTokens[] = T_WHITESPACE;
             $ignoreTokens[] = T_COMMENT;
             $ignoreTokens[] = T_SEMICOLON;
-            $ignoreTokens[] = T_COMMA;
             $nextContent    = $phpcsFile->findNext($ignoreTokens, ($closeBrace + 1), null, true);
-            if ($tokens[$nextContent]['content'] !== $phpcsFile->eolChar
-                && $tokens[$nextContent]['line'] === $tokens[$closeBrace]['line']
-            ) {
+            if ($tokens[$nextContent]['line'] === $tokens[$closeBrace]['line']) {
                 $type  = strtolower($tokens[$stackPtr]['content']);
                 $error = 'Closing %s brace must be on a line by itself';
                 $data  = [$type];

src/Standards/PSR2/Tests/Classes/ClassDeclarationUnitTest.inc

@@ -316,3 +316,31 @@ class ClassWithMultiLineImplementsAndCommentOnSameLineAsInterfaceName implements
     /* Comment. */ AnotherInterface
 {
 }
+
+// Verify the `CloseBraceSameLine` error code is thrown when expected.
+class ClassBraceNotOnLineByItselfError
+{
+    public $prop;
+} $foo = new ClassBraceNotOnLineByItselfError;
+
+interface ClassBraceNotOnLineByItselfTrailingCommentIsAllowed
+{
+    public function myMethod();
+} //end interface -- this comment is allowed.
+
+trait ClassBraceNotOnLineByItselfTrailingAnnotationIsAllowed
+{
+} // phpcs:ignore Stnd.Cat.Sniff -- this comment is also allowed.
+
+// Issue squizlabs/PHP_CodeSniffer#2621 - fix was superseded by fix for #2678.
+$foo->bar(
+    new class implements Bar {
+        // ...
+    },
+);
+
+enum BraceNotOnLineByItselfCloseTagError
+{
+} ?>
+
+<?php

src/Standards/PSR2/Tests/Classes/ClassDeclarationUnitTest.inc.fixed

@@ -305,3 +305,31 @@ class ClassWithMultiLineImplementsAndCommentOnSameLineAsInterfaceName implements
     AnotherInterface
 {
 }
+
+// Verify the `CloseBraceSameLine` error code is thrown when expected.
+class ClassBraceNotOnLineByItselfError
+{
+    public $prop;
+} $foo = new ClassBraceNotOnLineByItselfError;
+
+interface ClassBraceNotOnLineByItselfTrailingCommentIsAllowed
+{
+    public function myMethod();
+} //end interface -- this comment is allowed.
+
+trait ClassBraceNotOnLineByItselfTrailingAnnotationIsAllowed
+{
+} // phpcs:ignore Stnd.Cat.Sniff -- this comment is also allowed.
+
+// Issue squizlabs/PHP_CodeSniffer#2621 - fix was superseded by fix for #2678.
+$foo->bar(
+    new class implements Bar {
+        // ...
+    },
+);
+
+enum BraceNotOnLineByItselfCloseTagError
+{
+} ?>
+
+<?php

src/Standards/PSR2/Tests/Classes/ClassDeclarationUnitTest.php

@@ -78,6 +78,8 @@ public function getErrorList()
             282 => 1,
             310 => 1,
             316 => 1,
+            324 => 1,
+            344 => 1,
         ];
 
     }//end getErrorList()