Issue 2382. Using a variable in a scope before its declared that shadows another variable

compiler/javatests/com/google/dart/compiler/resolver/NegativeResolverTest.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.resolver;
 
 import static com.google.dart.compiler.common.ErrorExpectation.assertErrors;
 import static com.google.dart.compiler.common.ErrorExpectation.errEx;
 
 import com.google.dart.compiler.CompilerTestCase;
 import com.google.dart.compiler.DartCompilationError;
@@ skipping 652 matching lines @@
             "  bar() {",
             "    {",
             "      var bb;",
             "    }",
             "    var bb;",
             "  }",
             "}"),
         errEx(ResolverErrorCode.DUPLICATE_LOCAL_VARIABLE_WARNING, 6, 11, 1));
   }
 
+  /**
+   * Here we have two local variables: one in "main" and one in the scope on "block". However
+   * variables are declared in lexical scopes, i.e. in "block", so using it before declaration is
+   * error.
+   * <p>
+   * http://code.google.com/p/dart/issues/detail?id=2382
+   */
+  public void test_useVariable_beforeDeclaration_inLexicalScope() throws Exception {
+    checkSourceErrors(
+        makeCode(
+            "// filler filler filler filler filler filler filler filler filler filler",
+            "main() {",
+            "  var x;",
+            "  {",
+            "    x = 1;",
+            "    var x;",
+            "  }",
+            "}",
+            ""),
+        errEx(ResolverErrorCode.USING_LOCAL_VARIABLE_BEFORE_DECLARATION, 5, 5, 1),
+        errEx(ResolverErrorCode.DUPLICATE_LOCAL_VARIABLE_WARNING, 6, 9, 1));
+  }
+
   public void test_nameShadow_field_variable() {
     checkSourceErrors(
         makeCode(
             "// filler filler filler filler filler filler filler filler filler filler",
             "class A {",
             "  var a;",
             "  foo() {",
             "    var a;",
             "    var bb;",
             "  }",
@@ skipping 599 matching lines @@
     checkSourceErrors(
         makeCode(
             "class A {",
             "}",
             "method() {",
             "  A.method();", // error
             "}"),
             errEx(ResolverErrorCode.CANNOT_RESOLVE_METHOD_IN_CLASS, 4, 5, 6));
   }
 }