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diff --git a/deps/v8/test/mjsunit/mirror-date.js b/deps/v8/test/mjsunit/mirror-date.js
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+++ b/deps/v8/test/mjsunit/mirror-date.js
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+// Copyright 2008 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:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (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: --expose-debug-as debug
+// Test the mirror object for boolean values
+
+function testDateMirror(d, iso8601) {
+  // Create mirror and JSON representation.
+  var mirror = debug.MakeMirror(d);
+  var serializer = debug.MakeMirrorSerializer();
+  var json = serializer.serializeValue(mirror);
+
+  // Check the mirror hierachy.
+  assertTrue(mirror instanceof debug.Mirror);
+  assertTrue(mirror instanceof debug.ValueMirror);
+  assertTrue(mirror instanceof debug.ObjectMirror);
+  assertTrue(mirror instanceof debug.DateMirror);
+
+  // Check the mirror properties.
+  assertTrue(mirror.isDate());
+  assertEquals('object', mirror.type());
+  assertFalse(mirror.isPrimitive());
+
+  // Test text representation
+  assertEquals(iso8601, mirror.toText());
+
+  // Parse JSON representation and check.
+  var fromJSON = eval('(' + json + ')');
+  assertEquals('object', fromJSON.type);
+  assertEquals('Date', fromJSON.className);
+  assertEquals(iso8601, fromJSON.value);
+}
+
+
+// Test Date values.
+testDateMirror(new Date(Date.parse("Dec 25, 1995 1:30 UTC")), "1995-12-25T01:30:00.000Z");
+d = new Date();
+d.setUTCFullYear(1967);
+d.setUTCMonth(0); // January.
+d.setUTCDate(17);
+d.setUTCHours(9);
+d.setUTCMinutes(22);
+d.setUTCSeconds(59);
+d.setUTCMilliseconds(0);
+testDateMirror(d, "1967-01-17T09:22:59.000Z");
+d.setUTCMilliseconds(1);
+testDateMirror(d, "1967-01-17T09:22:59.001Z");
+d.setUTCMilliseconds(12);
+testDateMirror(d, "1967-01-17T09:22:59.012Z");
+d.setUTCMilliseconds(123);
+testDateMirror(d, "1967-01-17T09:22:59.123Z");