1 files changed, 127 insertions, 0 deletions
diff --git a/src/strconv/decimal_test.go b/src/strconv/decimal_test.go
new file mode 100644
index 000000000..13a127f5b
--- /dev/null
+++ b/src/strconv/decimal_test.go
@@ -0,0 +1,127 @@
+// 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)
+		}
+	}
+}