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/*
* test/20_nj-st-75-2017.js - dmul, drhtz, drhfz tests using NJ ST-75 for 2017
*
* @licstart The following is the entire license notice for the
* JavaScript code in this file.
*
* Copyright (C) 2017 Patrick McDermott
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As additional permission under GNU GPL version 3 section 7, you
* may distribute non-source (e.g. minimized or compacted) forms of
* this program without the copy of the GNU GPL normally required by
* section 4, provided you include this license notice and a URL
* through which recipients can access the Corresponding Source.
*
* @licend The above is the entire license notice
* for the JavaScript code in this file.
*/
var assert = require("assert");
require("../lib/decmath.js");
describe("dmul(), drhtz(), and drhfz()", function() {
/*
* There are 1000 test amounts between 0.01 and 10.00. Six require
* tie-breaking when rounding the calculated tax, but NJ's ST-75 appears
* to use different tie-breaking rules for different amounts:
*
* Rate Amt Tax ST-75 Rule
* ----------------------------------------
* 0.06875 * 0.80 = 0.055 0.06 Half up
* 2.40 0.165 0.17 Half up
* 4.00 0.275 0.27 Half down
* 5.60 0.385 0.38 Half down
* 7.20 0.495 0.49 Half down
* 8.80 0.605 0.60 Half down
*
* So in the below two-dimensional array, we test both rounding
* functions for all but these six anomalous amounts. This means we are
* running 1000 * 2 - 6 tests.
*/
var tests = [
/*From To Tax Rounding fns*/
[0.01, 0.07, .00, drhtz, drhfz],
[0.08, 0.21, .01, drhtz, drhfz],
[0.22, 0.36, .02, drhtz, drhfz],
[0.37, 0.50, .03, drhtz, drhfz],
[0.51, 0.65, .04, drhtz, drhfz],
[0.66, 0.79, .05, drhtz, drhfz],
[0.80, 0.80, .06, drhfz],
[0.81, 0.94, .06, drhtz, drhfz],
[0.95, 1.09, .07, drhtz, drhfz],
[1.10, 1.23, .08, drhtz, drhfz],
[1.24, 1.38, .09, drhtz, drhfz],
[1.39, 1.52, .10, drhtz, drhfz],
[1.53, 1.67, .11, drhtz, drhfz],
[1.68, 1.81, .12, drhtz, drhfz],
[1.82, 1.96, .13, drhtz, drhfz],
[1.97, 2.10, .14, drhtz, drhfz],
[2.11, 2.25, .15, drhtz, drhfz],
[2.26, 2.39, .16, drhtz, drhfz],
[2.40, 2.40, .17, drhfz],
[2.41, 2.54, .17, drhtz, drhfz],
[2.55, 2.69, .18, drhtz, drhfz],
[2.70, 2.83, .19, drhtz, drhfz],
[2.84, 2.98, .20, drhtz, drhfz],
[2.99, 3.12, .21, drhtz, drhfz],
[3.13, 3.27, .22, drhtz, drhfz],
[3.28, 3.41, .23, drhtz, drhfz],
[3.42, 3.56, .24, drhtz, drhfz],
[3.57, 3.70, .25, drhtz, drhfz],
[3.71, 3.85, .26, drhtz, drhfz],
[3.86, 3.99, .27, drhtz, drhfz],
[4.00, 4.00, .27, drhtz ],
[4.01, 4.14, .28, drhtz, drhfz],
[4.15, 4.29, .29, drhtz, drhfz],
[4.30, 4.43, .30, drhtz, drhfz],
[4.44, 4.58, .31, drhtz, drhfz],
[4.59, 4.72, .32, drhtz, drhfz],
[4.73, 4.87, .33, drhtz, drhfz],
[4.88, 5.01, .34, drhtz, drhfz],
[5.02, 5.16, .35, drhtz, drhfz],
[5.17, 5.30, .36, drhtz, drhfz],
[5.31, 5.45, .37, drhtz, drhfz],
[5.46, 5.59, .38, drhtz, drhfz],
[5.60, 5.60, .38, drhtz ],
[5.61, 5.74, .39, drhtz, drhfz],
[5.75, 5.89, .40, drhtz, drhfz],
[5.90, 6.03, .41, drhtz, drhfz],
[6.04, 6.18, .42, drhtz, drhfz],
[6.19, 6.32, .43, drhtz, drhfz],
[6.33, 6.47, .44, drhtz, drhfz],
[6.48, 6.61, .45, drhtz, drhfz],
[6.62, 6.76, .46, drhtz, drhfz],
[6.77, 6.90, .47, drhtz, drhfz],
[6.91, 7.05, .48, drhtz, drhfz],
[7.06, 7.19, .49, drhtz, drhfz],
[7.20, 7.20, .49, drhtz ],
[7.21, 7.34, .50, drhtz, drhfz],
[7.35, 7.49, .51, drhtz, drhfz],
[7.50, 7.63, .52, drhtz, drhfz],
[7.64, 7.78, .53, drhtz, drhfz],
[7.79, 7.92, .54, drhtz, drhfz],
[7.93, 8.07, .55, drhtz, drhfz],
[8.08, 8.21, .56, drhtz, drhfz],
[8.22, 8.36, .57, drhtz, drhfz],
[8.37, 8.50, .58, drhtz, drhfz],
[8.51, 8.65, .59, drhtz, drhfz],
[8.66, 8.79, .60, drhtz, drhfz],
[8.80, 8.80, .60, drhtz ],
[8.81, 8.94, .61, drhtz, drhfz],
[8.95, 9.09, .62, drhtz, drhfz],
[9.10, 9.23, .63, drhtz, drhfz],
[9.24, 9.38, .64, drhtz, drhfz],
[9.39, 9.52, .65, drhtz, drhfz],
[9.53, 9.67, .66, drhtz, drhfz],
[9.68, 9.81, .67, drhtz, drhfz],
[9.82, 9.96, .68, drhtz, drhfz],
[9.97, 10.00, .69, drhtz, drhfz],
];
tests.forEach(function(test) {
for (var i = test[0]; i <= test[1]; i = dadd(i, "0.01")) {
test.slice(3).forEach(function(f) {
var rule;
switch (f) {
case drhtz:
rule = "toward zero";
break;
case drhfz:
rule = "away from zero";
break;
}
var t = f(dmul(i, "0.06875"), 2);
it("correctly multiply " + i +
" by 0.06875 and round " + rule +
" to " + test[2], function() {
assert.equal(t, test[2]);
});
});
}
});
});
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