Issue 26146. Get next token after '{' or '}' while skipping interpolations.

pkg/analyzer/test/generated/parser_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer.test.generated.parser_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
 import 'package:analyzer/src/dart/ast/token.dart';
@@ skipping 2015 matching lines @@
   void test_staticTopLevelDeclaration_typedef() {
     ParserTestCase.parseCompilationUnit(
         "static typedef F();", [ParserErrorCode.STATIC_TOP_LEVEL_DECLARATION]);
   }
 
   void test_staticTopLevelDeclaration_variable() {
     ParserTestCase.parseCompilationUnit(
         "static var x;", [ParserErrorCode.STATIC_TOP_LEVEL_DECLARATION]);
   }
 
+  void test_string_unterminated_interpolation_block() {
+    ParserTestCase.parseCompilationUnit(
+        r'''
+m() {
+ {
+ '${${
+''',
+        [
+          ScannerErrorCode.UNTERMINATED_STRING_LITERAL,
+          ParserErrorCode.EXPECTED_TOKEN,
+          ParserErrorCode.EXPECTED_TOKEN,
+          ParserErrorCode.EXPECTED_TOKEN,
+          ParserErrorCode.EXPECTED_TOKEN,
+          ParserErrorCode.EXPECTED_TOKEN,
+          ParserErrorCode.EXPECTED_TOKEN,
+        ]);
+  }
+
   void test_switchHasCaseAfterDefaultCase() {
     parse4(
         "parseSwitchStatement",
         "switch (a) {default: return 0; case 1: return 1;}",
         [ParserErrorCode.SWITCH_HAS_CASE_AFTER_DEFAULT_CASE]);
   }
 
   void test_switchHasCaseAfterDefaultCase_repeated() {
     parse4("parseSwitchStatement",
         "switch (a) {default: return 0; case 1: return 1; case 2: return 2;}", [
@@ skipping 8964 matching lines @@
         new Scanner(null, new CharSequenceReader(source), listener);
     Token tokenStream = scanner.tokenize();
     //
     // Parse the source.
     //
     Parser parser = new Parser(null, listener);
     return invokeParserMethodImpl(
         parser, methodName, <Object>[tokenStream], tokenStream) as Token;
   }
 }