128 lines
3 KiB
Go
128 lines
3 KiB
Go
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package strconv_test
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import (
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. "strconv"
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"testing"
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)
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type shiftTest struct {
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i uint64
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shift int
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out string
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}
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var shifttests = []shiftTest{
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{0, -100, "0"},
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{0, 100, "0"},
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{1, 100, "1267650600228229401496703205376"},
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{1, -100,
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"0.00000000000000000000000000000078886090522101180541" +
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"17285652827862296732064351090230047702789306640625",
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},
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{12345678, 8, "3160493568"},
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{12345678, -8, "48225.3046875"},
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{195312, 9, "99999744"},
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{1953125, 9, "1000000000"},
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}
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func TestDecimalShift(t *testing.T) {
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for i := 0; i < len(shifttests); i++ {
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test := &shifttests[i]
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d := NewDecimal(test.i)
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d.Shift(test.shift)
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s := d.String()
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if s != test.out {
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t.Errorf("Decimal %v << %v = %v, want %v",
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test.i, test.shift, s, test.out)
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}
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}
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}
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type roundTest struct {
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i uint64
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nd int
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down, round, up string
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int uint64
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}
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var roundtests = []roundTest{
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{0, 4, "0", "0", "0", 0},
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{12344999, 4, "12340000", "12340000", "12350000", 12340000},
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{12345000, 4, "12340000", "12340000", "12350000", 12340000},
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{12345001, 4, "12340000", "12350000", "12350000", 12350000},
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{23454999, 4, "23450000", "23450000", "23460000", 23450000},
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{23455000, 4, "23450000", "23460000", "23460000", 23460000},
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{23455001, 4, "23450000", "23460000", "23460000", 23460000},
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{99994999, 4, "99990000", "99990000", "100000000", 99990000},
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{99995000, 4, "99990000", "100000000", "100000000", 100000000},
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{99999999, 4, "99990000", "100000000", "100000000", 100000000},
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{12994999, 4, "12990000", "12990000", "13000000", 12990000},
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{12995000, 4, "12990000", "13000000", "13000000", 13000000},
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{12999999, 4, "12990000", "13000000", "13000000", 13000000},
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}
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func TestDecimalRound(t *testing.T) {
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for i := 0; i < len(roundtests); i++ {
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test := &roundtests[i]
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d := NewDecimal(test.i)
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d.RoundDown(test.nd)
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s := d.String()
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if s != test.down {
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t.Errorf("Decimal %v RoundDown %d = %v, want %v",
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test.i, test.nd, s, test.down)
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}
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d = NewDecimal(test.i)
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d.Round(test.nd)
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s = d.String()
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if s != test.round {
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t.Errorf("Decimal %v Round %d = %v, want %v",
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test.i, test.nd, s, test.down)
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}
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d = NewDecimal(test.i)
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d.RoundUp(test.nd)
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s = d.String()
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if s != test.up {
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t.Errorf("Decimal %v RoundUp %d = %v, want %v",
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test.i, test.nd, s, test.up)
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}
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}
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}
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type roundIntTest struct {
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i uint64
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shift int
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int uint64
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}
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var roundinttests = []roundIntTest{
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{0, 100, 0},
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{512, -8, 2},
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{513, -8, 2},
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{640, -8, 2},
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{641, -8, 3},
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{384, -8, 2},
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{385, -8, 2},
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{383, -8, 1},
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{1, 100, 1<<64 - 1},
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{1000, 0, 1000},
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}
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func TestDecimalRoundedInteger(t *testing.T) {
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for i := 0; i < len(roundinttests); i++ {
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test := roundinttests[i]
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d := NewDecimal(test.i)
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d.Shift(test.shift)
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int := d.RoundedInteger()
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if int != test.int {
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t.Errorf("Decimal %v >> %v RoundedInteger = %v, want %v",
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test.i, test.shift, int, test.int)
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}
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}
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}
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