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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] d := NewDecimal(test.i) d.Shift(test.shift) s := d.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] d := NewDecimal(test.i) d.RoundDown(test.nd) s := d.String() if s != test.down { t.Errorf("Decimal %v RoundDown %d = %v, want %v", test.i, test.nd, s, test.down) } d = NewDecimal(test.i) d.Round(test.nd) s = d.String() if s != test.round { t.Errorf("Decimal %v Round %d = %v, want %v", test.i, test.nd, s, test.down) } d = NewDecimal(test.i) d.RoundUp(test.nd) s = d.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] d := NewDecimal(test.i) d.Shift(test.shift) int := d.RoundedInteger() if int != test.int { t.Errorf("Decimal %v >> %v RoundedInteger = %v, want %v", test.i, test.shift, int, test.int) } } }