1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/*
* 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 Libiquity LLC
*
* 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]);
});
});
}
});
});
|
