2009-01-22 13:53:06 +00:00
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// Copyright 2009 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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2016-01-11 23:09:27 +00:00
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// Flags: --allow-natives-syntax --legacy-const
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2011-04-11 13:24:50 +00:00
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2009-01-22 13:53:06 +00:00
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// Test the handling of initialization of deleted const variables.
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// This only makes sense in local scopes since the declaration and
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// initialization of consts in the global scope happen at the same
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// time.
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function testIntroduceGlobal() {
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var source =
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// Deleting 'x' removes the local const property.
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"delete x;" +
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2014-07-14 14:01:04 +00:00
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// Initialization redefines global 'x'.
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2009-01-22 13:53:06 +00:00
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"const x = 3; assertEquals(3, x);" +
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2014-07-14 14:01:04 +00:00
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// Test constness of the global 'x'.
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"x = 4; assertEquals(3, x);";
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2009-01-22 13:53:06 +00:00
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eval(source);
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}
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testIntroduceGlobal();
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2014-07-14 14:01:04 +00:00
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assertEquals("undefined", typeof x);
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2009-01-22 13:53:06 +00:00
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function testAssignExistingGlobal() {
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var source =
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// Delete 'x' to remove the local const property.
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"delete x;" +
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2014-07-14 14:01:04 +00:00
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// Initialization redefines global 'x'.
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2009-01-22 13:53:06 +00:00
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"const x = 5; assertEquals(5, x);" +
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2014-07-14 14:01:04 +00:00
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// Test constness of the global 'x'.
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"x = 6; assertEquals(5, x);";
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2009-01-22 13:53:06 +00:00
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eval(source);
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}
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testAssignExistingGlobal();
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2014-07-14 14:01:04 +00:00
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assertEquals("undefined", typeof x);
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2009-01-22 13:53:06 +00:00
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function testAssignmentArgument(x) {
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function local() {
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var source = "delete x; const x = 7; assertEquals(7, x)";
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eval(source);
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}
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local();
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2014-07-14 14:01:04 +00:00
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assertEquals("undefined", typeof x);
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2009-01-22 13:53:06 +00:00
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}
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2011-04-11 13:24:50 +00:00
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for (var i = 0; i < 5; i++) {
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2010-08-31 08:05:42 +00:00
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testAssignmentArgument();
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}
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2011-04-11 13:24:50 +00:00
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%OptimizeFunctionOnNextCall(testAssignmentArgument);
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testAssignmentArgument();
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2014-07-14 14:01:04 +00:00
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assertEquals("undefined", typeof x);
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2009-01-22 13:53:06 +00:00
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__defineSetter__('x', function() { throw 42; });
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2014-07-14 14:01:04 +00:00
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var finished = false;
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function testRedefineGlobal() {
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// Initialization redefines global 'x'.
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var source = "delete x; const x = 8; finished = true;";
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2009-01-22 13:53:06 +00:00
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eval(source);
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}
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2014-07-14 14:01:04 +00:00
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testRedefineGlobal();
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assertTrue(finished);
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2009-01-22 13:53:06 +00:00
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function testInitFastCaseExtension() {
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var source = "const x = 9; assertEquals(9, x); x = 10; assertEquals(9, x)";
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eval(source);
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}
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testInitFastCaseExtension();
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function testInitSlowCaseExtension() {
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var source = "";
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// Introduce 100 properties on the context extension object to force
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// it in slow case.
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2010-06-08 11:20:36 +00:00
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for (var i = 0; i < 100; i++) source += ("var a" + i + " = " + i + ";");
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2009-01-22 13:53:06 +00:00
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source += "const x = 10; assertEquals(10, x); x = 11; assertEquals(10, x)";
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eval(source);
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}
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testInitSlowCaseExtension();
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function testAssignSurroundingContextSlot() {
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var x = 12;
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function local() {
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var source = "delete x; const x = 13; assertEquals(13, x)";
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eval(source);
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}
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local();
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2014-07-14 14:01:04 +00:00
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assertEquals(12, x);
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2009-01-22 13:53:06 +00:00
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}
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testAssignSurroundingContextSlot();
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