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