syncthing/lib/config/size_test.go

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// Copyright (C) 2017 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package config
2019-02-12 06:58:24 +00:00
import (
"testing"
"github.com/syncthing/syncthing/lib/util"
)
type TestStruct struct {
Size Size `default:"10%"`
}
func TestSizeDefaults(t *testing.T) {
x := &TestStruct{}
util.SetDefaults(x)
if !x.Size.Percentage() {
t.Error("not percentage")
}
if x.Size.Value != 10 {
t.Error("not ten")
}
}
func TestParseSize(t *testing.T) {
cases := []struct {
in string
ok bool
val float64
pct bool
}{
// We accept upper case SI units
{"5K", true, 5e3, false}, // even when they should be lower case
{"4 M", true, 4e6, false},
{"3G", true, 3e9, false},
{"2 T", true, 2e12, false},
// We accept lower case SI units out of user friendliness
{"1 k", true, 1e3, false},
{"2m", true, 2e6, false},
{"3 g", true, 3e9, false},
{"4t", true, 4e12, false},
// Fractions are OK
{"123.456 k", true, 123.456e3, false},
{"0.1234 m", true, 0.1234e6, false},
{"3.45 g", true, 3.45e9, false},
// We don't parse negative numbers
{"-1", false, 0, false},
{"-1k", false, 0, false},
{"-0.45g", false, 0, false},
// We accept various unit suffixes on the unit prefix
{"100 KBytes", true, 100e3, false},
{"100 Kbps", true, 100e3, false},
{"100 MAU", true, 100e6, false},
// Percentages are OK
{"1%", true, 1, true},
{"200%", true, 200, true}, // even large ones
{"200K%", true, 200e3, true}, // even with prefixes, although this makes no sense
{"2.34%", true, 2.34, true}, // fractions are A-ok
// The empty string is a valid zero
{"", true, 0, false},
{" ", true, 0, false},
}
for _, tc := range cases {
size, err := ParseSize(tc.in)
if !tc.ok {
if err == nil {
t.Errorf("Unexpected nil error in UnmarshalText(%q)", tc.in)
}
continue
}
if err != nil {
t.Errorf("Unexpected error in UnmarshalText(%q): %v", tc.in, err)
continue
}
if size.BaseValue() > tc.val*1.001 || size.BaseValue() < tc.val*0.999 {
// Allow 0.1% slop due to floating point multiplication
t.Errorf("Incorrect value in UnmarshalText(%q): %v, wanted %v", tc.in, size.BaseValue(), tc.val)
}
if size.Percentage() != tc.pct {
t.Errorf("Incorrect percentage bool in UnmarshalText(%q): %v, wanted %v", tc.in, size.Percentage(), tc.pct)
}
}
}
func TestFormatSI(t *testing.T) {
cases := []struct {
bytes int64
result string
}{
{
bytes: 0,
result: "0 ", // space for unit
},
{
bytes: 999,
result: "999 ",
},
{
bytes: 1000,
result: "1.0 K",
},
{
bytes: 1023 * 1000,
result: "1.0 M",
},
{
bytes: 5 * 1000 * 1000 * 1000,
result: "5.0 G",
},
{
bytes: 50000 * 1000 * 1000 * 1000 * 1000,
result: "50000.0 T",
},
}
for _, tc := range cases {
res := formatSI(tc.bytes)
if res != tc.result {
t.Errorf("formatSI(%d) => %q, expected %q", tc.bytes, res, tc.result)
}
}
}