Issue 6908. Fix parsing look for receiver.() in switch.

compiler/javatests/com/google/dart/compiler/parser/SyntaxTest.java

 // Copyright (c) 2012, 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.
 
 package com.google.dart.compiler.parser;
 
 import com.google.common.base.Joiner;
 import com.google.dart.compiler.DartCompilerListener;
 import com.google.dart.compiler.DartSourceTest;
 import com.google.dart.compiler.ast.DartAnnotation;
@@ skipping 22 matching lines @@
 import com.google.dart.compiler.ast.DartStringLiteral;
 import com.google.dart.compiler.ast.DartTryStatement;
 import com.google.dart.compiler.ast.DartTypeExpression;
 import com.google.dart.compiler.ast.DartTypeNode;
 import com.google.dart.compiler.ast.DartUnaryExpression;
 import com.google.dart.compiler.ast.DartUnit;
 import com.google.dart.compiler.ast.DartVariable;
 import com.google.dart.compiler.ast.DartVariableStatement;
 import com.google.dart.compiler.ast.NodeList;
 
+import static com.google.dart.compiler.common.ErrorExpectation.assertErrors;
+import static com.google.dart.compiler.common.ErrorExpectation.errEx;
+
 import java.util.List;
 
 public class SyntaxTest extends AbstractParserTest {
   public void test_exportDirective_combinators() {
     parseUnit("test.dart", Joiner.on("\n").join(
         "library lib;",
         "export 'a.dart' show A, B hide C, D;"));
   }
 
   public void test_exportDirective_noCombinators() {
@@ skipping 24 matching lines @@
   public void test_switch_noLBrace() {
     parseUnit("test.dart", Joiner.on("\n").join(
         "// filler filler filler filler filler filler filler filler filler filler",
         "main() {",
         "  switch (0)",
         "}",
         ""),
         ParserErrorCode.EXPECTED_TOKEN, 3, 12);
   }
 
+  /**
+   * There was bug that handling missing identifier (method name) after "cursor." in switch caused
+   * infinite parsing loop.
+   * <p>
+   * http://code.google.com/p/dart/issues/detail?id=6908
+   */
+  public void test_switch_noMethodName_inCase() {
+    DartParserRunner runner = parseSource(Joiner.on("\n").join(
+        "// filler filler filler filler filler filler filler filler filler filler",
+        "void main() {",
+        "  print((e) {",
+        "    switch (e) {",
+        "      case 'Up': cursor.();",
+        "      case 'Down':",
+        "    }",
+        "  }); ",
+        "}",
+        ""));
+    assertErrors(runner.getErrors(),
+        errEx(ParserErrorCode.INVALID_IDENTIFIER, 5, 24, 1));
+  }
+
   public void test_getter() {
     parseUnit("getter.dart", Joiner.on("\n").join(
         "class G {",
         "  // Old getter syntax",
         "  int get g1 => 1;",
         "  // New getter syntax",
         "  int get g2 => 2;",
         "}"));
   }
 
@@ skipping 1419 matching lines @@
             "typedef func(var arg());",
             ParserErrorCode.FUNCTION_TYPED_PARAMETER_IS_VAR, 1, 18);
   }
 
   public void test_finalInFunctionType() throws Exception {
     parseUnit("phony_var_in_function_type.dart",
             "typedef func(final arg());",
             ParserErrorCode.FUNCTION_TYPED_PARAMETER_IS_FINAL, 1, 20);
   }
 }