diff --git a/TODO.txt b/TODO.txt
index ca3bf89..c2eb0ef 100644
--- a/TODO.txt
+++ b/TODO.txt
@@ -17,6 +17,7 @@ TODO
 - ensure DEBUG is off when publishing
 - safety: don't accept result if length is 0 or very short, e.g. when throwing UnimplementedError in StringTools.
 - No blank lines between {{ and }}
+- No blank line after { and before }
 - Investigate line endings. Keep existing style, but also offer option to convert.
 
 DONE (I think)
diff --git a/lib/src/FormatState.dart b/lib/src/FormatState.dart
index ae7b3d0..d4d4cec 100644
--- a/lib/src/FormatState.dart
+++ b/lib/src/FormatState.dart
@@ -203,10 +203,20 @@ class FormatState
             logInternal('  filler/2:                           ${StringTools.toDisplayString(filler)}');
         }
 
-        final int pos = filler.indexOf('\n');
-        if (Constants.DEBUG_FORMAT_STATE) logInternal('  pos:       $pos');
-        if (pos >= 0)
+        final int lineBreakPos = filler.indexOf('\n');
+        if (Constants.DEBUG_FORMAT_STATE) logInternal('  lineBreakPos:                       $lineBreakPos');
+        if (lineBreakPos >= 0)
+        {
+            if (Constants.DEBUG_FORMAT_STATE) logInternal('  Line break already in filler => not adding line break');
+            return;
+        }
+
+        // TODO: test
+        if (nextToken.toString() == ';')
+        {
+            if (Constants.DEBUG_FORMAT_STATE) logInternal('  nextToken is ";" => not adding line break');
             return;
+        }
 
         if (nextToken.offset == _parseResult.content.length)
         {
diff --git a/lib/src/Formatters/SwitchExpressionFormatter.dart b/lib/src/Formatters/SwitchExpressionFormatter.dart
index b6a24b0..cf19cb3 100644
--- a/lib/src/Formatters/SwitchExpressionFormatter.dart
+++ b/lib/src/Formatters/SwitchExpressionFormatter.dart
@@ -31,11 +31,10 @@ class SwitchExpressionFormatter extends IFormatter
         formatState.copyEntity(node.leftParenthesis, astVisitor, '$methodName/node.leftParenthesis');
         formatState.copyEntity(node.expression, astVisitor, '$methodName/node.expression');
         formatState.copyEntity(node.rightParenthesis, astVisitor, '$methodName/node.rightParenthesis');
-        formatState.copyEntity(node.leftBracket, astVisitor, '$methodName/node.leftBracket');
-        //formatState.pushLevel('$methodName/node.members');
+
+        formatState.copyOpeningBraceAndPushLevel(node.leftBracket, config, '$methodName/node.leftBracket');
         formatState.acceptListWithComma(node.cases, node.rightBracket, astVisitor, '$methodName/node.cases');
-        //formatState.popLevelAndIndent();
-        formatState.copyEntity(node.rightBracket, astVisitor, '$methodName/node.rightBracket');
+        formatState.copyClosingBraceAndPopLevel(node.rightBracket, config, '$methodName/node.rightBracket');
 
         if (Constants.DEBUG_I_FORMATTER) log('END   $methodName(${StringTools.toDisplayString(node, Constants.MAX_DEBUG_LENGTH)})', --formatState.logIndent);
     }
diff --git a/test/FormateState/AddNewLineAfterToken_test.dart b/test/FormateState/AddNewLineAfterToken_test.dart
new file mode 100644
index 0000000..be0ffdb
--- /dev/null
+++ b/test/FormateState/AddNewLineAfterToken_test.dart
@@ -0,0 +1,49 @@
+import 'package:analyzer/dart/analysis/results.dart';
+import 'package:analyzer/dart/analysis/utilities.dart' as AnalyzerUtilities; // ignore: library_prefixes
+import 'package:analyzer/dart/ast/token.dart';
+import 'package:dart_format/src/FormatState.dart';
+import 'package:test/test.dart';
+
+import '../TestTools/TestTools.dart';
+
+void main()
+{
+    TestTools.init();
+
+    group('FormatState', ()
+        {
+            // TODO: better tests, tests with non-;
+            test('addNewLineAfterToken with ;', ()
+                {
+                    const String inputText = 'int i=0;int j=0;';
+                    final Token inputToken1 = Token(TokenType.STRING, 0);
+                    final Token inputToken2 = Token(TokenType.SEMICOLON, 6);
+                    final Token inputToken3 = Token(TokenType.STRING, 7);
+                    final Token inputToken4 = Token(TokenType.SEMICOLON, 14);
+                    inputToken1.next = inputToken2;
+                    inputToken2.next = inputToken3;
+                    inputToken3.next = inputToken4;
+
+                    final ParseStringResult parseResult = AnalyzerUtilities.parseString(content: inputText);
+                    final FormatState formatState = FormatState(
+                        parseResult,
+                        indentationSpacesPerLevel: 4,
+                        removeTrailingCommas: true
+                    );
+
+                    formatState.addText('int i=0', 'SOURCE');
+                    TestTools.expect(formatState.getResult(), equals('int i=0'));
+                    formatState.addText(';', 'SOURCE');
+                    formatState.addNewLineAfterToken(inputToken1, 'SOURCE', add: true);
+                    TestTools.expect(formatState.getResult(), equals('int i=0;'));
+
+                    formatState.addText('int j=0', 'SOURCE');
+                    TestTools.expect(formatState.getResult(), equals('int i=0;int j=0'));
+                    formatState.addText(';', 'SOURCE');
+                    formatState.addNewLineAfterToken(inputToken3, 'SOURCE', add: true);
+                    TestTools.expect(formatState.getResult(), equals('int i=0;int j=0;'));
+                }
+            );
+        }
+    );
+}
diff --git a/test/Formatters/SwitchExpressionFormatter_test.dart b/test/Formatters/SwitchExpressionFormatter_test.dart
new file mode 100644
index 0000000..4713cc4
--- /dev/null
+++ b/test/Formatters/SwitchExpressionFormatter_test.dart
@@ -0,0 +1,33 @@
+import 'package:analyzer/dart/ast/ast.dart';
+import 'package:dart_format/src/Formatters/SwitchExpressionFormatter.dart';
+
+import '../TestTools/AstCreator.dart';
+import '../TestTools/TestConfig.dart';
+import '../TestTools/TestGroupConfig.dart';
+import '../TestTools/TestTools.dart';
+import '../TestTools/Visitors/TestVisitor.dart';
+
+void main()
+{
+    TestTools.init();
+
+    final List<TestGroupConfig> testGroupConfigs = <TestGroupConfig>[
+        TestGroupConfig(
+            inputNodeCreator: AstCreator.createSwitchExpressionInReturnStatementExpressionInFunction,
+            inputLeading: 'int f(){return ',
+            inputMiddle: 'switch(0){0=>0}',
+            inputTrailing: ';}',
+            name: 'SwitchPatternCase',
+            astVisitors: <TestVisitor<void>>[
+                TestVisitor<IntegerLiteral>(22, '0'),
+                TestVisitor<SwitchExpressionCase>(25, '0=>0'),
+            ],
+            testConfigs: <TestConfig>[
+                TestConfig.none(),
+                TestConfig('switch(0)\n{\n    0=>0\n}')
+            ]
+        )
+    ];
+
+    TestTools.runTestGroupsForFormatter(testGroupConfigs, 'SwitchExpressionFormatter', SwitchExpressionFormatter.new, StackTrace.current);
+}
diff --git a/test/TestTools/AstCreator.dart b/test/TestTools/AstCreator.dart
index 7e29acc..a0eda7e 100644
--- a/test/TestTools/AstCreator.dart
+++ b/test/TestTools/AstCreator.dart
@@ -100,6 +100,9 @@ class AstCreator
     static OnClause createOnClauseInMixinDeclaration(String s)
     => createMixinDeclaration(s).onClause!;
 
+    static ReturnStatement createReturnStatementInFunction(String s)
+    => createStatementInFunction(s) as ReturnStatement;
+
     static SimpleFormalParameter createSimpleFormalParameterInFunction(String s)
     => createFormalParameterInFunction(s) as SimpleFormalParameter;
 
@@ -109,6 +112,12 @@ class AstCreator
     static Statement createStatementInWhileInFunction(String s)
     => createWhileStatementInFunction(s).body;
 
+    static Expression createReturnStatementExpressionInFunction(String s)
+    => createReturnStatementInFunction(s).expression!;
+
+    static SwitchExpression createSwitchExpressionInReturnStatementExpressionInFunction(String s)
+    => createReturnStatementExpressionInFunction(s) as SwitchExpression;
+
     static SwitchStatement createSwitchStatementInFunction(String s)
     => createStatementInFunction(s) as SwitchStatement;