test/webkit/parseInt.js

// Copyright 2013 the V8 project authors. All rights reserved.
// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
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description('Tests for the parseInt function.');

// Simple hex & dec integer values.
shouldBe("parseInt('123')", '123');
shouldBe("parseInt('123x4')", '123');
shouldBe("parseInt('-123')", '-123');
shouldBe("parseInt('0x123')", '0x123');
shouldBe("parseInt('0x123x4')", '0x123');
shouldBe("parseInt('-0x123x4')", '-0x123');
shouldBe("parseInt('-')", 'Number.NaN');
shouldBe("parseInt('0x')", 'Number.NaN');
shouldBe("parseInt('-0x')", 'Number.NaN');

// These call default to base 10, unless radix is explicitly 16.
shouldBe("parseInt('123', undefined)", '123');
shouldBe("parseInt('123', null)", '123');
shouldBe("parseInt('123', 0)", '123');
shouldBe("parseInt('123', 10)", '123');
shouldBe("parseInt('123', 16)", '0x123');
// These call default to base 16, unless radix is explicitly 10.
shouldBe("parseInt('0x123', undefined)", '0x123');
shouldBe("parseInt('0x123', null)", '0x123');
shouldBe("parseInt('0x123', 0)", '0x123');
shouldBe("parseInt('0x123', 10)", '0');
shouldBe("parseInt('0x123', 16)", '0x123');

// Test edge cases for the Number.toString exponential ranges.
shouldBe("parseInt(Math.pow(10, 20))", '100000000000000000000');
shouldBe("parseInt(Math.pow(10, 21))", '1');
shouldBe("parseInt(Math.pow(10, -6))", '0');
shouldBe("parseInt(Math.pow(10, -7))", '1');
shouldBe("parseInt(-Math.pow(10, 20))", '-100000000000000000000');
shouldBe("parseInt(-Math.pow(10, 21))", '-1');
shouldBe("parseInt(-Math.pow(10, -6))", '-0');
shouldBe("parseInt(-Math.pow(10, -7))", '-1');

// Test correct handling for -0.
shouldBe("parseInt('0')", '0');
shouldBe("parseInt('-0')", '-0');
shouldBe("parseInt(0)", '0');
shouldBe("parseInt(-0)", '0');

// Test edge cases of our optimized int handling.
shouldBe("parseInt(2147483647)", '2147483647');
shouldBe("parseInt(2147483648)", '2147483648');
shouldBe("parseInt('2147483647')", '2147483647');
shouldBe("parseInt('2147483648')", '2147483648');

// Add test cases where the ToString/ToInt32 conversions throw.
var state;
var throwingRadix = { valueOf: function(){ state = "throwingRadix"; throw null; } };
var throwingString = { toString: function(){ state = "throwingString"; throw null; } };
shouldBe("state = null; try { parseInt('123', throwingRadix); } catch (e) {} state;", '"throwingRadix"');
shouldBe("state = null; try { parseInt(throwingString, throwingRadix); } catch (e) {} state;", '"throwingString"');