Parse harmony let declarations.

test/mjsunit/harmony/block-let-declaration.js

Index: test/mjsunit/harmony/block-let-declaration.js
diff --git a/test/mjsunit/harmony/block-scoping.js b/test/mjsunit/harmony/block-let-declaration.js
similarity index 69%
copy from test/mjsunit/harmony/block-scoping.js
copy to test/mjsunit/harmony/block-let-declaration.js
index 1181bd12329a101d4a8331f617de0c50b304bafc..08e82d4e9b9360cff8147003c5b9433bb4136156 100644
--- a/test/mjsunit/harmony/block-scoping.js
+++ b/test/mjsunit/harmony/block-let-declaration.js
@@ -1,4 +1,4 @@
-// Copyright 2008 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -25,34 +25,29 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --allow-natives-syntax --harmony-block-scoping
-// Test functionality of block scopes.
+// Flags: --harmony-block-scoping
 
-// Hoisting of var declarations.
-function f1() {
-  {
-    var x = 1;
-    var y;
-  }
-  assertEquals(1, x)
-  assertEquals(undefined, y)
+// Test let declarations in various settings.
+
+// Global
+let x;
+let y = 2;
+
+{
+  let y;
+  let x = 3;
 }
-f1();
 
-// Dynamic lookup through block scopes.
-function f2(one) {
-  var x = one + 1;
-  // TODO(keuchel): introduce let
-  // let y = one + 2;
-  if (one == 1) {
-    // Parameter
-    assertEquals(1, eval('one'));
-    // Function local var variable
-    assertEquals(2, eval('x'));
-    // Function local let variable
-    // TODO(keuchel): introduce let
-    // assertEquals(3, eval('y'));
-  }
+if (true) {
+  let x;
 }
-f2(1);
 
+assertDoesNotThrow("if (true) var x;");
+assertDoesNotThrow("with ({}) var x;");
+assertDoesNotThrow("do var x; while (false)");
+assertDoesNotThrow("while (false) var x;");
+
+assertThrows("if (true) let x;", SyntaxError);
+assertThrows("with ({}) let x;", SyntaxError);
+assertThrows("do let x; while (false)", SyntaxError);
+assertThrows("while (false) let x;", SyntaxError);