summaryrefslogtreecommitdiffstats
path: root/t/20_nj-st-75-2017.t
blob: 873db245c7ec5c42413c8780f8aa09155068f01c (plain)
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
# t/11_nj-st-75-2017.t - dmul, drhtz, drhfz tests using NJ ST-75 for 2017
#
# 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/>.

use strict;
use warnings;

use Test::More;
use B qw(svref_2object);
use Math::FastPPDecimal;

my @st75;
my $from;
my $to;
my $tax;
my @funcs;
my $i;
my $t;
my $f;

# 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.

plan("tests" => 1000 * 2 - 6);

@st75 = (
	# From    To  Tax  Rounding functions
	[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],
);

foreach (@st75) {
	($from, $to, $tax, @funcs) = @{$_};
	for ($i = $from; $i <= $to; $i = dadd($i, "0.01")) {
		foreach $f (@funcs) {
			$t = &$f(dmul($i, "0.06875"), 2);
			is(int($t), int($tax), svref_2object($f)->GV->NAME .
				"(dmul(" . $i . ", \"0.06875\"), 2)");
		}
	}
}