Test that record types work correctly in outlines

I don't believe there's any way for record literals to show up in the
outline, and I think this is a reasonable representative sample, but if
you think more tests would be better, let me know.

Change-Id: Ia62ad30d860d70a483249879f2ae8bea8e65b6a6
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/257442
Reviewed-by: Samuel Rawlins <srawlins@google.com>
Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>

pkg/analysis_server/test/src/computer/outline_computer_test.dart

@@ -1572,6 +1572,73 @@ set propB(int v) {}
     }
   }
 
+  Future<void> test_topLevelFunction_recordTypes() async {
+    var unitOutline = await _computeOutline('''
+(int, int) f((String, String) r) => throw '';
+''');
+
+    var topOutlines = unitOutline.children!;
+    expect(topOutlines, hasLength(1));
+
+    assertJsonText(topOutlines[0], '''
+{
+  "element": {
+    "kind": "FUNCTION",
+    "name": "f",
+    "location": {
+      "file": "/home/test/lib/test.dart",
+      "offset": 11,
+      "length": 1,
+      "startLine": 1,
+      "startColumn": 12,
+      "endLine": 1,
+      "endColumn": 13
+    },
+    "flags": 8,
+    "parameters": "((String, String) r)",
+    "returnType": "(int, int)"
+  },
+  "offset": 0,
+  "length": 45,
+  "codeOffset": 0,
+  "codeLength": 45
+}
+''');
+  }
+
+  Future<void> test_topLevelVariable_recordTypes() async {
+    var unitOutline = await _computeOutline('''
+(int, int)? r = null;
+''');
+
+    var topOutlines = unitOutline.children!;
+    expect(topOutlines, hasLength(1));
+
+    assertJsonText(topOutlines[0], '''
+{
+  "element": {
+    "kind": "TOP_LEVEL_VARIABLE",
+    "name": "r",
+    "location": {
+      "file": "/home/test/lib/test.dart",
+      "offset": 12,
+      "length": 1,
+      "startLine": 1,
+      "startColumn": 13,
+      "endLine": 1,
+      "endColumn": 14
+    },
+    "flags": 0,
+    "returnType": "(int, int)?"
+  },
+  "offset": 0,
+  "length": 21,
+  "codeOffset": 12,
+  "codeLength": 8
+}
+''');
+  }
+
   void _expect(Outline outline,
       {ElementKind? kind,
       bool leaf = false,

pkg/analyzer/lib/src/dart/ast/to_source_visitor.dart

@@ -915,6 +915,9 @@ class ToSourceVisitor implements AstVisitor<void> {
     }
     _visitNode(namedFields);
     sink.write(')');
+    if (node.question != null) {
+      sink.write('?');
+    }
   }
 
   @override

pkg/analyzer/test/src/dart/ast/to_source_visitor_test.dart

@@ -2852,6 +2852,17 @@ $code f() {}
     );
   }
 
+  void test_visitRecordTypeAnnotation_positional_nullable() {
+    final code = '(int, bool)?';
+    var findNode = _parseStringToFindNode('''
+$code f() {}
+''');
+    _assertSource(
+      code,
+      findNode.recordTypeAnnotation(code),
+    );
+  }
+
   void test_visitRedirectingConstructorInvocation_named() {
     _assertSource(
         "this.c()", AstTestFactory.redirectingConstructorInvocation2("c"));