Source file
src/strconv/decimal_test.go
Documentation: strconv
1
2
3
4
5 package strconv_test
6
7 import (
8 . "strconv"
9 "testing"
10 )
11
12 type shiftTest struct {
13 i uint64
14 shift int
15 out string
16 }
17
18 var shifttests = []shiftTest{
19 {0, -100, "0"},
20 {0, 100, "0"},
21 {1, 100, "1267650600228229401496703205376"},
22 {1, -100,
23 "0.00000000000000000000000000000078886090522101180541" +
24 "17285652827862296732064351090230047702789306640625",
25 },
26 {12345678, 8, "3160493568"},
27 {12345678, -8, "48225.3046875"},
28 {195312, 9, "99999744"},
29 {1953125, 9, "1000000000"},
30 }
31
32 func TestDecimalShift(t *testing.T) {
33 for i := 0; i < len(shifttests); i++ {
34 test := &shifttests[i]
35 d := NewDecimal(test.i)
36 d.Shift(test.shift)
37 s := d.String()
38 if s != test.out {
39 t.Errorf("Decimal %v << %v = %v, want %v",
40 test.i, test.shift, s, test.out)
41 }
42 }
43 }
44
45 type roundTest struct {
46 i uint64
47 nd int
48 down, round, up string
49 int uint64
50 }
51
52 var roundtests = []roundTest{
53 {0, 4, "0", "0", "0", 0},
54 {12344999, 4, "12340000", "12340000", "12350000", 12340000},
55 {12345000, 4, "12340000", "12340000", "12350000", 12340000},
56 {12345001, 4, "12340000", "12350000", "12350000", 12350000},
57 {23454999, 4, "23450000", "23450000", "23460000", 23450000},
58 {23455000, 4, "23450000", "23460000", "23460000", 23460000},
59 {23455001, 4, "23450000", "23460000", "23460000", 23460000},
60
61 {99994999, 4, "99990000", "99990000", "100000000", 99990000},
62 {99995000, 4, "99990000", "100000000", "100000000", 100000000},
63 {99999999, 4, "99990000", "100000000", "100000000", 100000000},
64
65 {12994999, 4, "12990000", "12990000", "13000000", 12990000},
66 {12995000, 4, "12990000", "13000000", "13000000", 13000000},
67 {12999999, 4, "12990000", "13000000", "13000000", 13000000},
68 }
69
70 func TestDecimalRound(t *testing.T) {
71 for i := 0; i < len(roundtests); i++ {
72 test := &roundtests[i]
73 d := NewDecimal(test.i)
74 d.RoundDown(test.nd)
75 s := d.String()
76 if s != test.down {
77 t.Errorf("Decimal %v RoundDown %d = %v, want %v",
78 test.i, test.nd, s, test.down)
79 }
80 d = NewDecimal(test.i)
81 d.Round(test.nd)
82 s = d.String()
83 if s != test.round {
84 t.Errorf("Decimal %v Round %d = %v, want %v",
85 test.i, test.nd, s, test.down)
86 }
87 d = NewDecimal(test.i)
88 d.RoundUp(test.nd)
89 s = d.String()
90 if s != test.up {
91 t.Errorf("Decimal %v RoundUp %d = %v, want %v",
92 test.i, test.nd, s, test.up)
93 }
94 }
95 }
96
97 type roundIntTest struct {
98 i uint64
99 shift int
100 int uint64
101 }
102
103 var roundinttests = []roundIntTest{
104 {0, 100, 0},
105 {512, -8, 2},
106 {513, -8, 2},
107 {640, -8, 2},
108 {641, -8, 3},
109 {384, -8, 2},
110 {385, -8, 2},
111 {383, -8, 1},
112 {1, 100, 1<<64 - 1},
113 {1000, 0, 1000},
114 }
115
116 func TestDecimalRoundedInteger(t *testing.T) {
117 for i := 0; i < len(roundinttests); i++ {
118 test := roundinttests[i]
119 d := NewDecimal(test.i)
120 d.Shift(test.shift)
121 int := d.RoundedInteger()
122 if int != test.int {
123 t.Errorf("Decimal %v >> %v RoundedInteger = %v, want %v",
124 test.i, test.shift, int, test.int)
125 }
126 }
127 }
128
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