initial generic method comment parsing

pkg/analyzer/test/generated/scanner_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 engine.scanner_test;
 
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/scanner.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:unittest/unittest.dart';
@@ skipping 246 matching lines @@
     Scanner scanner = new Scanner(
         null,
         new CharSequenceReader("/* comment */ "),
         AnalysisErrorListener.NULL_LISTENER);
     scanner.preserveComments = false;
     Token token = scanner.tokenize();
     expect(token, isNotNull);
     expect(token.precedingComments, isNull);
   }
 
+  void test_comment_generic_method_type_assign() {
+    _assertComment(TokenType.MULTI_LINE_COMMENT, "/*=comment*/");
+    _assertComment(TokenType.GENERIC_METHOD_TYPE_ASSIGN, "/*=comment*/",
+        genericMethodComments: true);
+  }
+
+  void test_comment_generic_method_type_list() {
+    _assertComment(TokenType.MULTI_LINE_COMMENT, "/*<comment>*/");
+    _assertComment(TokenType.GENERIC_METHOD_TYPE_LIST, "/*<comment>*/",
+        genericMethodComments: true);
+  }
+
   void test_comment_multi() {
     _assertComment(TokenType.MULTI_LINE_COMMENT, "/* comment */");
   }
 
   void test_comment_multi_lineEnds() {
     String code = r'''
 /**
  * aa
  * bbb
  * c
@@ skipping 764 matching lines @@
 
   void test_tilde_slash_eq() {
     _assertToken(TokenType.TILDE_SLASH_EQ, "~/=");
   }
 
   void test_unclosedPairInInterpolation() {
     GatheringErrorListener listener = new GatheringErrorListener();
     _scanWithListener("'\${(}'", listener);
   }
 
-  void _assertComment(TokenType commentType, String source) {
+  void _assertComment(TokenType commentType, String source,
+      {bool genericMethodComments: false}) {
     //
     // Test without a trailing end-of-line marker
     //
-    Token token = _scan(source);
+    Token token = _scan(source, genericMethodComments: genericMethodComments);
     expect(token, isNotNull);
     expect(token.type, TokenType.EOF);
     Token comment = token.precedingComments;
     expect(comment, isNotNull);
     expect(comment.type, commentType);
     expect(comment.offset, 0);
     expect(comment.length, source.length);
     expect(comment.lexeme, source);
     //
     // Test with a trailing end-of-line marker
     //
-    token = _scan("$source\n");
+    token = _scan("$source\n", genericMethodComments: genericMethodComments);
     expect(token, isNotNull);
     expect(token.type, TokenType.EOF);
     comment = token.precedingComments;
     expect(comment, isNotNull);
     expect(comment.type, commentType);
     expect(comment.offset, 0);
     expect(comment.length, source.length);
     expect(comment.lexeme, source);
   }
 
@@ skipping 148 matching lines @@
       expect(token.length, expectedToken.length,
           reason: "Wrong length for token $i");
       expect(token.lexeme, expectedToken.lexeme,
           reason: "Wrong lexeme for token $i");
       token = token.next;
       expect(token, isNotNull);
     }
     expect(token.type, TokenType.EOF);
   }
 
-  Token _scan(String source) {
+  Token _scan(String source, {bool genericMethodComments: false}) {
     GatheringErrorListener listener = new GatheringErrorListener();
-    Token token = _scanWithListener(source, listener);
+    Token token = _scanWithListener(source, listener,
+        genericMethodComments: genericMethodComments);
     listener.assertNoErrors();
     return token;
   }
 
-  Token _scanWithListener(String source, GatheringErrorListener listener) {
+  Token _scanWithListener(String source, GatheringErrorListener listener,
+      {bool genericMethodComments: false}) {
     Scanner scanner =
         new Scanner(null, new CharSequenceReader(source), listener);
+    if (genericMethodComments) {
+      scanner.scanGenericMethodComments = true;
+    }
     Token result = scanner.tokenize();
     listener.setLineInfo(new TestSource(), scanner.lineStarts);
     return result;
   }
 }
 
 /**
  * An `ExpectedLocation` encodes information about the expected location of a
  * given offset in source code.
  */
@@ skipping 134 matching lines @@
     expect(TokenType.LT_LT.isUserDefinableOperator, isTrue);
     expect(TokenType.MINUS.isUserDefinableOperator, isTrue);
     expect(TokenType.PERCENT.isUserDefinableOperator, isTrue);
     expect(TokenType.PLUS.isUserDefinableOperator, isTrue);
     expect(TokenType.SLASH.isUserDefinableOperator, isTrue);
     expect(TokenType.STAR.isUserDefinableOperator, isTrue);
     expect(TokenType.TILDE.isUserDefinableOperator, isTrue);
     expect(TokenType.TILDE_SLASH.isUserDefinableOperator, isTrue);
   }
 }