| /* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */ |
| /* This Source Code Form is subject to the terms of the Mozilla Public |
| * License, v. 2.0. If a copy of the MPL was not distributed with this |
| * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| |
| |
| /** |
| File Name: 9.8.1.js |
| ECMA Section: 9.8.1 ToString Applied to the Number Type |
| Description: The operator ToString convers a number m to string |
| as follows: |
| |
| 1. if m is NaN, return the string "NaN" |
| 2. if m is +0 or -0, return the string "0" |
| 3. if m is less than zero, return the string |
| concatenation of the string "-" and ToString(-m). |
| 4. If m is Infinity, return the string "Infinity". |
| 5. Otherwise, let n, k, and s be integers such that |
| k >= 1, 10k1 <= s < 10k, the number value for s10nk |
| is m, and k is as small as possible. Note that k is |
| the number of digits in the decimal representation |
| of s, that s is not divisible by 10, and that the |
| least significant digit of s is not necessarily |
| uniquely determined by these criteria. |
| 6. If k <= n <= 21, return the string consisting of the |
| k digits of the decimal representation of s (in order, |
| with no leading zeroes), followed by n-k occurences |
| of the character '0'. |
| 7. If 0 < n <= 21, return the string consisting of the |
| most significant n digits of the decimal |
| representation of s, followed by a decimal point |
| '.', followed by the remaining kn digits of the |
| decimal representation of s. |
| 8. If 6 < n <= 0, return the string consisting of the |
| character '0', followed by a decimal point '.', |
| followed by n occurences of the character '0', |
| followed by the k digits of the decimal |
| representation of s. |
| 9. Otherwise, if k = 1, return the string consisting |
| of the single digit of s, followed by lowercase |
| character 'e', followed by a plus sign '+' or minus |
| sign '' according to whether n1 is positive or |
| negative, followed by the decimal representation |
| of the integer abs(n1) (with no leading zeros). |
| 10. Return the string consisting of the most significant |
| digit of the decimal representation of s, followed |
| by a decimal point '.', followed by the remaining k1 |
| digits of the decimal representation of s, followed |
| by the lowercase character 'e', followed by a plus |
| sign '+' or minus sign '' according to whether n1 is |
| positive or negative, followed by the decimal |
| representation of the integer abs(n1) (with no |
| leading zeros). |
| |
| Note that if x is any number value other than 0, then |
| ToNumber(ToString(x)) is exactly the same number value as x. |
| |
| As noted, the least significant digit of s is not always |
| uniquely determined by the requirements listed in step 5. |
| The following specification for step 5 was considered, but |
| not adopted: |
| |
| Author: christine@netscape.com |
| Date: 10 july 1997 |
| */ |
| |
| var SECTION = "9.8.1"; |
| var VERSION = "ECMA_1"; |
| startTest(); |
| |
| writeHeaderToLog( SECTION + " ToString applied to the Number type"); |
| |
| new TestCase( SECTION, "Number.NaN", "NaN", Number.NaN + "" ); |
| new TestCase( SECTION, "0", "0", 0 + "" ); |
| new TestCase( SECTION, "-0", "0", -0 + "" ); |
| new TestCase( SECTION, "Number.POSITIVE_INFINITY", "Infinity", Number.POSITIVE_INFINITY + "" ); |
| new TestCase( SECTION, "Number.NEGATIVE_INFINITY", "-Infinity", Number.NEGATIVE_INFINITY + "" ); |
| new TestCase( SECTION, "-1", "-1", -1 + "" ); |
| |
| // cases in step 6: integers 1e21 > x >= 1 or -1 >= x > -1e21 |
| |
| new TestCase( SECTION, "1", "1", 1 + "" ); |
| new TestCase( SECTION, "10", "10", 10 + "" ); |
| new TestCase( SECTION, "100", "100", 100 + "" ); |
| new TestCase( SECTION, "1000", "1000", 1000 + "" ); |
| new TestCase( SECTION, "10000", "10000", 10000 + "" ); |
| new TestCase( SECTION, "10000000000", "10000000000", 10000000000 + "" ); |
| new TestCase( SECTION, "10000000000000000000", "10000000000000000000", 10000000000000000000 + "" ); |
| new TestCase( SECTION, "100000000000000000000","100000000000000000000",100000000000000000000 + "" ); |
| |
| new TestCase( SECTION, "12345", "12345", 12345 + "" ); |
| new TestCase( SECTION, "1234567890", "1234567890", 1234567890 + "" ); |
| |
| new TestCase( SECTION, "-1", "-1", -1 + "" ); |
| new TestCase( SECTION, "-10", "-10", -10 + "" ); |
| new TestCase( SECTION, "-100", "-100", -100 + "" ); |
| new TestCase( SECTION, "-1000", "-1000", -1000 + "" ); |
| new TestCase( SECTION, "-1000000000", "-1000000000", -1000000000 + "" ); |
| new TestCase( SECTION, "-1000000000000000", "-1000000000000000", -1000000000000000 + "" ); |
| new TestCase( SECTION, "-100000000000000000000", "-100000000000000000000", -100000000000000000000 + "" ); |
| new TestCase( SECTION, "-1000000000000000000000", "-1e+21", -1000000000000000000000 + "" ); |
| |
| new TestCase( SECTION, "-12345", "-12345", -12345 + "" ); |
| new TestCase( SECTION, "-1234567890", "-1234567890", -1234567890 + "" ); |
| |
| // cases in step 7: numbers with a fractional component, 1e21> x >1 or -1 > x > -1e21, |
| new TestCase( SECTION, "1.0000001", "1.0000001", 1.0000001 + "" ); |
| |
| // cases in step 8: fractions between 1 > x > -1, exclusive of 0 and -0 |
| |
| // cases in step 9: numbers with 1 significant digit >= 1e+21 or <= 1e-6 |
| |
| new TestCase( SECTION, "1000000000000000000000", "1e+21", 1000000000000000000000 + "" ); |
| new TestCase( SECTION, "10000000000000000000000", "1e+22", 10000000000000000000000 + "" ); |
| |
| // cases in step 10: numbers with more than 1 significant digit >= 1e+21 or <= 1e-6 |
| |
| new TestCase( SECTION, "1.2345", "1.2345", String( 1.2345)); |
| new TestCase( SECTION, "1.234567890", "1.23456789", String( 1.234567890 )); |
| |
| |
| new TestCase( SECTION, ".12345", "0.12345", String(.12345 ) ); |
| new TestCase( SECTION, ".012345", "0.012345", String(.012345) ); |
| new TestCase( SECTION, ".0012345", "0.0012345", String(.0012345) ); |
| new TestCase( SECTION, ".00012345", "0.00012345", String(.00012345) ); |
| new TestCase( SECTION, ".000012345", "0.000012345", String(.000012345) ); |
| new TestCase( SECTION, ".0000012345", "0.0000012345", String(.0000012345) ); |
| new TestCase( SECTION, ".00000012345", "1.2345e-7", String(.00000012345)); |
| |
| new TestCase( SECTION, "-1e21", "-1e+21", String(-1e21) ); |
| |
| test(); |
| |