lrn@google.com
d8a2043098
Review URL: https://codereview.chromium.org//623073002 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@40892 260f80e4-7a28-3924-810f-c04153c831b5
329 lines
12 KiB
Dart
329 lines
12 KiB
Dart
// Copyright (c) 2014 the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import "dart:math" show pow;
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import "package:expect/expect.dart";
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const whiteSpace = const [
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"",
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"\x09",
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"\x0a",
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"\x0b",
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"\x0c",
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"\x0d",
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"\x85", /// 01: ok
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"\xa0",
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"\u1680",
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"\u180e",
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"\u2000",
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"\u2001",
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"\u2002",
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"\u2003",
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"\u2004",
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"\u2005",
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"\u2006",
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"\u2007",
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"\u2008",
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"\u2009",
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"\u200a",
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"\u2028",
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"\u2029",
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"\u202f",
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"\u205f",
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"\u3000",
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"\uFEFF"
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];
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void expectNumEquals(double expect, var actual, String message) {
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if (expect.isNaN) {
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Expect.isTrue(actual is double && actual.isNaN, "isNaN: $message");
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} else {
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Expect.identical(expect, actual, message);
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}
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}
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// Test source surrounded by any combination of whitespace.
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void testParseAllWhitespace(String source, double result) {
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for (String ws1 in whiteSpace) {
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for (String ws2 in whiteSpace) {
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String padded = "$ws1$source$ws2";
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// Use Expect.identical because it also handles NaN and 0.0/-0.0.
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// Except on dart2js: http://dartbug.com/11551
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expectNumEquals(result, double.parse(padded), "parse '$padded'");
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padded = "$ws1$ws2$source";
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expectNumEquals(result, double.parse(padded), "parse '$padded'");
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padded = "$source$ws1$ws2";
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expectNumEquals(result, double.parse(padded), "parse '$padded'");
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}
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}
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}
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// Test source and -source surrounded by any combination of whitespace.
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void testParseWhitespace(String source, double result) {
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assert(result >= 0);
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testParseAllWhitespace(source, result);
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testParseAllWhitespace("-$source", -result);
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}
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// Test parsing source, optionally preceeded and/or followed by whitespace.
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void testParse(String source, double result, [name = ""]) {
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expectNumEquals(result, double.parse(source), "parse '$source:$name");
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expectNumEquals(result, double.parse(" $source"),
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"parse ' $source':$name");
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expectNumEquals(result, double.parse("$source "),
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"parse '$source ':$name");
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expectNumEquals(result, double.parse(" $source "),
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"parse ' $source ':$name");
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expectNumEquals(result, double.parse("+$source"),
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"parse '+$source:$name");
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expectNumEquals(result, double.parse(" +$source"),
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"parse ' +$source':$name");
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expectNumEquals(result, double.parse("+$source "),
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"parse '+$source ':$name");
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expectNumEquals(result, double.parse(" +$source "),
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"parse ' +$source ':$name");
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expectNumEquals(-result, double.parse("-$source"),
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"parse '-$source:$name");
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expectNumEquals(-result, double.parse(" -$source"),
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"parse ' -$source':$name");
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expectNumEquals(-result, double.parse("-$source "),
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"parse '-$source ':$name");
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expectNumEquals(-result, double.parse(" -$source "),
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"parse ' -$source ':$name");
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}
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void testDouble(double value) {
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testParse("$value", value);
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if (value.isFinite) {
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String exp = value.toStringAsExponential();
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String lcexp = exp.toLowerCase();
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testParse(lcexp, value);
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String ucexp = exp.toUpperCase();
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testParse(ucexp, value);
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}
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}
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void testFail(String source) {
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var object = new Object();
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Expect.throws(() {
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double.parse(source, (s) {
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Expect.equals(source, s);
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throw object;
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});
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}, (e) => identical(object, e), "Fail: '$source'");
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}
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void main() {
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testDouble(0.0);
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testDouble(5e-324);
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testDouble(2.225073858507201e-308);
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testDouble(2.2250738585072014e-308);
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testDouble(0.49999999999999994);
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testDouble(0.5);
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testDouble(0.50000000000000006);
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testDouble(0.9999999999999999);
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testDouble(1.0);
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testDouble(1.0000000000000002);
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testDouble(4294967295.0);
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testDouble(4294967296.0);
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testDouble(4503599627370495.5);
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testDouble(4503599627370497.0);
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testDouble(9007199254740991.0);
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testDouble(9007199254740992.0);
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testDouble(1.7976931348623157e+308);
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testDouble(double.INFINITY);
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testDouble(double.NAN);
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// Strings that cannot occur from toString of a number.
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testParse("000000000000", 0.0);
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testParse("000000000001", 1.0);
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testParse("000000000000.0000000000000", 0.0);
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testParse("000000000001.0000000000000", 1.0);
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testParse("0e0", 0.0);
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testParse("0e+0", 0.0);
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testParse("0e-0", 0.0);
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testParse("1e0", 1.0);
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testParse("1e+0", 1.0);
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testParse("1e-0", 1.0);
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testParse("1.", 1.0);
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testParse(".1", 0.1);
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testParse("1.e1", 10.0);
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testParse(".1e1", 1.0);
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testParse("Infinity", double.INFINITY);
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testParse("NaN", double.NAN);
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// Cases where mantissa and 10^exponent are representable as a double.
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for (int i = -22; i <= 22; i++) {
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for (double j in [1.0, 9007199254740991.0, 9007199254740992.0]) {
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var value = (i >= 0) ? j * pow(10.0, i) : j / pow(10.0, -i);
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testParse("${j}e$i", value, "$i/$j");
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testParse("${j}E$i", value, "$i/$j");
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if (i >= 0) {
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testParse("${j}e+$i", value, "$i/$j");
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testParse("${j}E+$i", value, "$i/$j");
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}
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}
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}
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for (int i = 0; i <= 22; i++) {
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var digits = "9007199254740991";
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for (int i = 0; i < digits.length; i++) {
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int dotIndex = digits.length - i;
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var string = "${digits.substring(0, dotIndex)}."
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"${digits.substring(dotIndex)}e$i";
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testParse(string, 9007199254740991.0);
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}
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}
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testParse("9007199254740993", 9007199254740992.0);
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testParse("9.007199254740993e15", 9007199254740992.0);
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testParse("0.00000009007199254740991e23", 9007199254740991.0);
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testParse("0.000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000004940656458412465441765687"
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"92868221372365059802614324764425585682500675507270"
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"20875186529983636163599237979656469544571773092665"
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"67103559397963987747960107818781263007131903114045"
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"27845817167848982103688718636056998730723050006387"
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"40915356498438731247339727316961514003171538539807"
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"41262385655911710266585566867681870395603106249319"
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"45271591492455329305456544401127480129709999541931"
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"98940908041656332452475714786901472678015935523861"
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"15501348035264934720193790268107107491703332226844"
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"75333572083243193609238289345836806010601150616980"
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"97530783422773183292479049825247307763759272478746"
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"56084778203734469699533647017972677717585125660551"
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"19913150489110145103786273816725095583738973359899"
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"36648099411642057026370902792427675445652290875386"
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"82506419718265533447265625", 5e-324);
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testParse("0.000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000002470328229206232720882843"
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"96434110686182529901307162382212792841250337753635"
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"10437593264991818081799618989828234772285886546332"
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"83551779698981993873980053909390631503565951557022"
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"63922908583924491051844359318028499365361525003193"
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"70457678249219365623669863658480757001585769269903"
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"70631192827955855133292783433840935197801553124659"
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"72635795746227664652728272200563740064854999770965"
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"99470454020828166226237857393450736339007967761930"
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"57750674017632467360096895134053553745851666113422"
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"37666786041621596804619144672918403005300575308490"
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"48765391711386591646239524912623653881879636239373"
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"28042389101867234849766823508986338858792562830275"
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"59956575244555072551893136908362547791869486679949"
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"68324049705821028513185451396213837722826145437693"
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"412532098591327667236328126", 5e-324);
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testParse("0.000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000000000000000000000000000000"
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"00000000000000000000000002470328229206232720882843"
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"96434110686182529901307162382212792841250337753635"
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"10437593264991818081799618989828234772285886546332"
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"83551779698981993873980053909390631503565951557022"
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"63922908583924491051844359318028499365361525003193"
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"70457678249219365623669863658480757001585769269903"
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"70631192827955855133292783433840935197801553124659"
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"72635795746227664652728272200563740064854999770965"
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"99470454020828166226237857393450736339007967761930"
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"57750674017632467360096895134053553745851666113422"
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"37666786041621596804619144672918403005300575308490"
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"48765391711386591646239524912623653881879636239373"
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"28042389101867234849766823508986338858792562830275"
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"59956575244555072551893136908362547791869486679949"
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"68324049705821028513185451396213837722826145437693"
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"412532098591327667236328125", 0.0);
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testParse("0.0000000000000000000000000000000000000000000000000"
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"000000000000000000000000000000000000000000000000000"
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"000000000000000000000000000000000000000000000000000"
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"000000000000000000000000000000000000000000000000000"
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"000000000000000000000000000000000000000000000000000"
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"000000000000000000000000000000000000000000000000000"
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"00022250738585072011", 2.225073858507201e-308);
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testParse("0.0000000000000000000000000000000000000000000000000"
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"000000000000000000000000000000000000000000000000000"
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"000000000000000000000000000000000000000000000000000"
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"000000000000000000000000000000000000000000000000000"
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"000000000000000000000000000000000000000000000000000"
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"000000000000000000000000000000000000000000000000000"
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"00022250738585072012", 2.2250738585072014e-308);
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testParse("0.49999999999999994", 0.49999999999999994);
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testParse("0.49999999999999997219", 0.49999999999999994);
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testParse("0.49999999999999999", 0.5);
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// Edge cases of algorithm (e+-22/23).
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testParse("1e22", 1e22);
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testParse("1e23", 1e23);
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testParse("1e-22", 1e-22);
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testParse("1e-23", 1e-23);
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testParseWhitespace("1", 1.0);
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testParseWhitespace("1.0", 1.0);
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testParseWhitespace("1e1", 10.0);
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testParseWhitespace(".1e1", 1.0);
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testParseWhitespace("1.e1", 10.0);
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testParseWhitespace("1e+1", 10.0);
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testParseWhitespace("1e-1", 0.1);
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// Negative tests - things not to allow.
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// Spaces inside the numeral.
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testFail("- 1");
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testFail("+ 1");
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testFail("2 2");
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testFail("1 .");
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testFail(". 1");
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testFail("1e 2");
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testFail("1 e2");
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// Invalid characters.
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testFail("0x0");
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testFail("0x1H");
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testFail("12H");
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testFail("1x2");
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testFail("00x2");
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testFail("0x2.2");
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// Double exponent without value.
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testFail(".e1");
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testFail("e1");
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testFail("e+1");
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testFail("e-1");
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testFail("-e1");
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testFail("-e+1");
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testFail("-e-1");
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// Too many signs.
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testFail("--1");
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testFail("-+1");
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testFail("+-1");
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testFail("++1");
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// Incorrect ways to write NaN/Infinity.
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testFail("infinity");
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testFail("INFINITY");
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testFail("1.#INF");
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testFail("inf");
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testFail("nan");
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testFail("NAN");
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testFail("1.#IND");
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testFail("indef");
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testFail("qnan");
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testFail("snan");
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}
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