blob: edf2a5bd45025cea687fb3a8d7fd2649dd6ecdf5 [file] [log] [blame]
// Copyright (c) 2013 the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
import "package:expect/expect.dart";
const whiteSpace = const [
"",
"\x09",
"\x0a",
"\x0b",
"\x0c",
"\x0d",
"\xa0",
"\u1680",
"\u2000",
"\u2001",
"\u2002",
"\u2003",
"\u2004",
"\u2005",
"\u2006",
"\u2007",
"\u2008",
"\u2009",
"\u200a",
"\u2028",
"\u2029",
"\u202f",
"\u205f",
"\u3000",
"\uFEFF"
];
void expectNumEquals(num expect, num actual, String message) {
if (expect is double && expect.isNaN) {
Expect.isTrue(actual is double && actual.isNaN, "isNaN: $message");
} else {
Expect.identical(expect, actual, message);
}
}
// Test source surrounded by any combination of whitespace.
void testParseAllWhitespace(String source, num result) {
for (String ws1 in whiteSpace) {
for (String ws2 in whiteSpace) {
String padded = "$ws1$source$ws2";
// Use Expect.identical because it also handles NaN and 0.0/-0.0.
// Except on dart2js: http://dartbug.com/11551
expectNumEquals(result, num.parse(padded), "parse '$padded'");
padded = "$ws1$ws2$source";
expectNumEquals(result, num.parse(padded), "parse '$padded'");
padded = "$source$ws1$ws2";
expectNumEquals(result, num.parse(padded), "parse '$padded'");
}
}
}
// Test source and -source surrounded by any combination of whitespace.
void testParseWhitespace(String source, num result) {
assert(result >= 0);
testParseAllWhitespace(source, result);
testParseAllWhitespace("-$source", -result);
}
void testParse(String source, num result) {
expectNumEquals(result, num.tryParse(source), "parse '$source'");
expectNumEquals(result, num.tryParse(" $source"), "parse ' $source'");
expectNumEquals(result, num.tryParse("$source "), "parse '$source '");
expectNumEquals(result, num.tryParse(" $source "), "parse ' $source '");
}
// Test parsing an integer in decimal or hex format, with or without signs.
void testInt(int value) {
testParse("$value", value);
testParse("+$value", value);
testParse("-$value", -value);
var hex = "0x${value.toRadixString(16)}";
var lchex = hex.toLowerCase();
testParse(lchex, value);
testParse("+$lchex", value);
testParse("-$lchex", -value);
var uchex = hex.toUpperCase();
testParse(uchex, value);
testParse("+$uchex", value);
testParse("-$uchex", -value);
}
// Test parsing an integer, and the integers just around it.
void testIntAround(int value) {
testInt(value - 1);
testInt(value);
testInt(value + 1);
}
void testDouble(double value) {
testParse("$value", value);
testParse("+$value", value);
testParse("-$value", -value);
if (value.isFinite) {
String exp = value.toStringAsExponential();
String lcexp = exp.toLowerCase();
testParse(lcexp, value);
testParse("+$lcexp", value);
testParse("-$lcexp", -value);
String ucexp = exp.toUpperCase();
testParse(ucexp, value);
testParse("+$ucexp", value);
testParse("-$ucexp", -value);
}
}
void testFail(String source) {
Expect.isNull(num.tryParse(source));
}
void main() {
testInt(0);
testInt(1);
testInt(9);
testInt(10);
testInt(99);
testInt(100);
testIntAround(256);
testIntAround(0x80000000); // 2^31
testIntAround(0x100000000); // 2^32
testIntAround(0x10000000000000); // 2^52
testIntAround(0x1FFFFFFFFFFFFF); // 2^53 - 1
testDouble(0.0);
testDouble(5e-324);
testDouble(2.225073858507201e-308);
testDouble(2.2250738585072014e-308);
testDouble(0.49999999999999994);
testDouble(0.5);
testDouble(0.50000000000000006);
testDouble(0.9999999999999999);
testDouble(1.0);
testDouble(1.0000000000000002);
testDouble(4294967295.0);
testDouble(4294967296.0);
testDouble(4503599627370495.5);
testDouble(4503599627370497.0);
testDouble(9007199254740991.0);
testDouble(9007199254740992.0);
testDouble(1.7976931348623157e+308);
testDouble(double.infinity);
testDouble(double.nan);
// Strings that cannot occur from toString of a number.
testParse("000000000000", 0);
testParse("000000000001", 1);
testParse("000000000000.0000000000000", 0.0);
testParse("000000000001.0000000000000", 1.0);
testParse("0x0000000000", 0);
testParse("0e0", 0.0);
testParse("0e+0", 0.0);
testParse("0e-0", 0.0);
testParse("-0e0", -0.0);
testParse("-0e+0", -0.0);
testParse("-0e-0", -0.0);
testParse("1e0", 1.0);
testParse("1e+0", 1.0);
testParse("1e-0", 1.0);
testParse("-1e0", -1.0);
testParse("-1e+0", -1.0);
testParse("-1e-0", -1.0);
testParse("1.", 1.0);
testParse(".1", 0.1);
testParse("1.e1", 10.0);
testParse(".1e1", 1.0);
testParseWhitespace("0x1", 1);
testParseWhitespace("1", 1);
testParseWhitespace("1.0", 1.0);
testParseWhitespace("1e1", 10.0);
testParseWhitespace(".1e1", 1.0);
testParseWhitespace("1.e1", 10.0);
testParseWhitespace("1e+1", 10.0);
testParseWhitespace("1e-1", 0.1);
// Negative tests - things not to allow.
// Spaces inside the numeral.
testFail("- 1");
testFail("+ 1");
testFail("2 2");
testFail("0x 42");
testFail("1 .");
testFail(". 1");
testFail("1e 2");
testFail("1 e2");
// Invalid characters.
testFail("0x1H");
testFail("12H");
testFail("1x2");
testFail("00x2");
testFail("0x2.2");
// Empty hex number.
testFail("0x");
testFail("-0x");
testFail("+0x");
// Double exponent without value.
testFail(".e1");
testFail("e1");
testFail("e+1");
testFail("e-1");
testFail("-e1");
testFail("-e+1");
testFail("-e-1");
// Incorrect ways to write NaN/Infinity.
testFail("infinity");
testFail("INFINITY");
testFail("1.#INF");
testFail("inf");
testFail("nan");
testFail("NAN");
testFail("1.#IND");
testFail("indef");
testFail("qnan");
testFail("snan");
}