[ddc] Add expression eval tests for local consts

See: https://dart-review.googlesource.com/c/sdk/+/445461
Change-Id: Ic819199a1afe515dcda05aa04fc3e1664a39055b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/446001
Reviewed-by: Jens Johansen <jensj@google.com>
Commit-Queue: Nicholas Shahan <nshahan@google.com>

pkg/dev_compiler/test/expression_compiler/expression_compiler_e2e_dart_3_10_test.dart

@@ -0,0 +1,92 @@
+// Copyright (c) 2025, 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.
+
+import 'package:dev_compiler/src/compiler/module_builder.dart'
+    show ModuleFormat;
+import 'package:test/test.dart';
+
+import '../shared_test_options.dart';
+import 'expression_compiler_e2e_suite.dart';
+
+void main(List<String> args) async {
+  var driver = await ExpressionEvaluationTestDriver.init();
+
+  group('Dart 3.10 language features', () {
+    tearDownAll(() async {
+      await driver.finish();
+    });
+
+    group('(AMD module system)', () {
+      var setup = SetupCompilerOptions(
+        moduleFormat: ModuleFormat.amd,
+        args: args,
+      );
+      runSharedTests(setup, driver);
+    });
+
+    group('(DDC module system)', () {
+      var setup = SetupCompilerOptions(
+        moduleFormat: ModuleFormat.ddc,
+        args: args,
+      );
+      runSharedTests(setup, driver);
+    });
+  });
+}
+
+/// Shared tests for language features introduced in version 3.10.0.
+void runSharedTests(
+  SetupCompilerOptions setup,
+  ExpressionEvaluationTestDriver driver,
+) {
+  group('local consts', () {
+    const recordsSource = '''
+    void main() {
+      topLevelMethod();
+
+      const mainLocalConst = Duration(seconds: 1);
+
+      inlineMethod() {
+        // The const from the outer scope is not available here during
+        // evaluation unless there is already a reference within this scope.
+        var x = mainLocalConst;
+        // Breakpoint: bp1
+        print('hello world');
+      }
+
+      inlineMethod();
+    }
+
+    void topLevelMethod() {
+      const methodLocalConst= Duration(seconds: 3);
+      // Breakpoint: bp2
+      print('hello world');
+    }
+    ''';
+
+    setUpAll(() async {
+      await driver.initSource(setup, recordsSource);
+    });
+
+    tearDownAll(() async {
+      await driver.cleanupTest();
+    });
+
+    test('defined in enclosing scope', () async {
+      await driver.checkInFrame(
+        breakpointId: 'bp1',
+        expression: 'mainLocalConst.toString()',
+        expectedResult: '0:00:01.000000',
+      );
+    });
+
+    test('defined in method', () async {
+      await driver.checkInFrame(
+        breakpointId: 'bp2',
+        expression: 'methodLocalConst.toString()',
+        expectedResult: '0:00:03.000000',
+      );
+    });
+  });
+}