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+/* -*- tab-width: 2; indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+
+/**
+   File Name:          12.10-1.js
+   ECMA Section:       12.10 The with statement
+   Description:
+   WithStatement :
+   with ( Expression ) Statement
+
+   The with statement adds a computed object to the front of the scope chain
+   of the current execution context, then executes a statement with this
+   augmented scope chain, then restores the scope chain.
+
+   Semantics
+
+   The production WithStatement : with ( Expression ) Statement is evaluated
+   as follows:
+   1.  Evaluate Expression.
+   2.  Call GetValue(Result(1)).
+   3.  Call ToObject(Result(2)).
+   4.  Add Result(3) to the front of the scope chain.
+   5.  Evaluate Statement using the augmented scope chain from step 4.
+   6.  Remove Result(3) from the front of the scope chain.
+   7.  Return Result(5).
+
+   Discussion
+   Note that no matter how control leaves the embedded Statement, whether
+   normally or by some form of abrupt completion, the scope chain is always
+   restored to its former state.
+
+   Author:             christine@netscape.com
+   Date:               12 november 1997
+*/
+
+var SECTION = "12.10-1";
+var VERSION = "ECMA_1";
+startTest();
+var TITLE   = "The with statement";
+
+writeHeaderToLog( SECTION + " "+ TITLE);
+
+
+// although the scope chain changes, the this value is immutable for a given
+// execution context.
+
+new TestCase( SECTION,
+	      "with( new Number() ) { this +'' }",
+	      GLOBAL,
+	      eval("with( new Number() ) { this +'' }") );
+
+// the object's functions and properties should override those of the
+// global object.
+
+new TestCase(
+  SECTION,
+  "var MYOB = new WithObject(true); with (MYOB) { parseInt() }",
+  true,
+  eval("var MYOB = new WithObject(true); with (MYOB) { parseInt() }") );
+
+new TestCase(
+  SECTION,
+  "var MYOB = new WithObject(false); with (MYOB) { NaN }",
+  false,
+  eval("var MYOB = new WithObject(false); with (MYOB) { NaN }") );
+
+new TestCase(
+  SECTION,
+  "var MYOB = new WithObject(NaN); with (MYOB) { Infinity }",
+  Number.NaN,
+  eval("var MYOB = new WithObject(NaN); with (MYOB) { Infinity }") );
+
+new TestCase(
+  SECTION,
+  "var MYOB = new WithObject(false); with (MYOB) { }; Infinity",
+  Number.POSITIVE_INFINITY,
+  eval("var MYOB = new WithObject(false); with (MYOB) { }; Infinity") );
+
+
+new TestCase(
+  SECTION,
+  "var MYOB = new WithObject(0); with (MYOB) { delete Infinity; Infinity }",
+  Number.POSITIVE_INFINITY,
+  eval("var MYOB = new WithObject(0); with (MYOB) { delete Infinity; Infinity }") );
+
+// let us leave the with block via a break.
+
+new TestCase(
+  SECTION,
+  "var MYOB = new WithObject(0); while (true) { with (MYOB) { Infinity; break; } } Infinity",
+  Number.POSITIVE_INFINITY,
+  eval("var MYOB = new WithObject(0); while (true) { with (MYOB) { Infinity; break; } } Infinity") );
+
+
+test();
+
+function WithObject( value ) {
+  this.prop1 = 1;
+  this.prop2 = new Boolean(true);
+  this.prop3 = "a string";
+  this.value = value;
+
+  // now we will override global functions
+
+  this.parseInt = new Function( "return this.value" );
+  this.NaN = value;
+  this.Infinity = value;
+  this.unescape = new Function( "return this.value" );
+  this.escape   = new Function( "return this.value" );
+  this.eval     = new Function( "return this.value" );
+  this.parseFloat = new Function( "return this.value" );
+  this.isNaN      = new Function( "return this.value" );
+  this.isFinite   = new Function( "return this.value" );
+}