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size_test.go
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size_test.go
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package units
import (
"fmt"
"reflect"
"runtime"
"strings"
"testing"
)
func ExampleBytesSize() {
fmt.Println(BytesSize(1024))
fmt.Println(BytesSize(1024 * 1024))
fmt.Println(BytesSize(1048576))
fmt.Println(BytesSize(2 * MiB))
fmt.Println(BytesSize(3.42 * GiB))
fmt.Println(BytesSize(5.372 * TiB))
fmt.Println(BytesSize(2.22 * PiB))
}
func ExampleHumanSize() {
fmt.Println(HumanSize(1000))
fmt.Println(HumanSize(1024))
fmt.Println(HumanSize(1000000))
fmt.Println(HumanSize(1048576))
fmt.Println(HumanSize(2 * MB))
fmt.Println(HumanSize(float64(3.42 * GB)))
fmt.Println(HumanSize(float64(5.372 * TB)))
fmt.Println(HumanSize(float64(2.22 * PB)))
}
func ExampleFromHumanSize() {
fmt.Println(FromHumanSize("32"))
fmt.Println(FromHumanSize("32b"))
fmt.Println(FromHumanSize("32B"))
fmt.Println(FromHumanSize("32k"))
fmt.Println(FromHumanSize("32K"))
fmt.Println(FromHumanSize("32kb"))
fmt.Println(FromHumanSize("32Kb"))
fmt.Println(FromHumanSize("32Mb"))
fmt.Println(FromHumanSize("32Gb"))
fmt.Println(FromHumanSize("32Tb"))
fmt.Println(FromHumanSize("32Pb"))
}
func ExampleRAMInBytes() {
fmt.Println(RAMInBytes("32"))
fmt.Println(RAMInBytes("32b"))
fmt.Println(RAMInBytes("32B"))
fmt.Println(RAMInBytes("32k"))
fmt.Println(RAMInBytes("32K"))
fmt.Println(RAMInBytes("32kb"))
fmt.Println(RAMInBytes("32Kb"))
fmt.Println(RAMInBytes("32Mb"))
fmt.Println(RAMInBytes("32Gb"))
fmt.Println(RAMInBytes("32Tb"))
fmt.Println(RAMInBytes("32Pb"))
fmt.Println(RAMInBytes("32PB"))
fmt.Println(RAMInBytes("32P"))
}
func TestBytesSize(t *testing.T) {
assertEquals(t, "1KiB", BytesSize(1024))
assertEquals(t, "1MiB", BytesSize(1024*1024))
assertEquals(t, "1MiB", BytesSize(1048576))
assertEquals(t, "2MiB", BytesSize(2*MiB))
assertEquals(t, "3.42GiB", BytesSize(3.42*GiB))
assertEquals(t, "5.372TiB", BytesSize(5.372*TiB))
assertEquals(t, "2.22PiB", BytesSize(2.22*PiB))
assertEquals(t, "1.049e+06YiB", BytesSize(KiB*KiB*KiB*KiB*KiB*PiB))
}
func TestHumanSize(t *testing.T) {
assertEquals(t, "1kB", HumanSize(1000))
assertEquals(t, "1.024kB", HumanSize(1024))
assertEquals(t, "1MB", HumanSize(1000000))
assertEquals(t, "1.049MB", HumanSize(1048576))
assertEquals(t, "2MB", HumanSize(2*MB))
assertEquals(t, "3.42GB", HumanSize(float64(3.42*GB)))
assertEquals(t, "5.372TB", HumanSize(float64(5.372*TB)))
assertEquals(t, "2.22PB", HumanSize(float64(2.22*PB)))
assertEquals(t, "1e+04YB", HumanSize(float64(10000000000000*PB)))
}
func TestFromHumanSize(t *testing.T) {
assertSuccessEquals(t, 0, FromHumanSize, "0")
assertSuccessEquals(t, 0, FromHumanSize, "0b")
assertSuccessEquals(t, 0, FromHumanSize, "0B")
assertSuccessEquals(t, 0, FromHumanSize, "0 B")
assertSuccessEquals(t, 32, FromHumanSize, "32")
assertSuccessEquals(t, 32, FromHumanSize, "32b")
assertSuccessEquals(t, 32, FromHumanSize, "32B")
assertSuccessEquals(t, 32*KB, FromHumanSize, "32k")
assertSuccessEquals(t, 32*KB, FromHumanSize, "32K")
assertSuccessEquals(t, 32*KB, FromHumanSize, "32kb")
assertSuccessEquals(t, 32*KB, FromHumanSize, "32Kb")
assertSuccessEquals(t, 32*MB, FromHumanSize, "32Mb")
assertSuccessEquals(t, 32*GB, FromHumanSize, "32Gb")
assertSuccessEquals(t, 32*TB, FromHumanSize, "32Tb")
assertSuccessEquals(t, 32*PB, FromHumanSize, "32Pb")
assertSuccessEquals(t, 32.5*KB, FromHumanSize, "32.5kB")
assertSuccessEquals(t, 32.5*KB, FromHumanSize, "32.5 kB")
assertSuccessEquals(t, 32, FromHumanSize, "32.5 B")
assertSuccessEquals(t, 300, FromHumanSize, "0.3 K")
assertSuccessEquals(t, 300, FromHumanSize, ".3kB")
assertSuccessEquals(t, 0, FromHumanSize, "0.")
assertSuccessEquals(t, 0, FromHumanSize, "0. ")
assertSuccessEquals(t, 0, FromHumanSize, "0.b")
assertSuccessEquals(t, 0, FromHumanSize, "0.B")
assertSuccessEquals(t, 0, FromHumanSize, "-0")
assertSuccessEquals(t, 0, FromHumanSize, "-0b")
assertSuccessEquals(t, 0, FromHumanSize, "-0B")
assertSuccessEquals(t, 0, FromHumanSize, "-0 b")
assertSuccessEquals(t, 0, FromHumanSize, "-0 B")
assertSuccessEquals(t, 32, FromHumanSize, "32.")
assertSuccessEquals(t, 32, FromHumanSize, "32.b")
assertSuccessEquals(t, 32, FromHumanSize, "32.B")
assertSuccessEquals(t, 32, FromHumanSize, "32. b")
assertSuccessEquals(t, 32, FromHumanSize, "32. B")
// We do not tolerate extra leading or trailing spaces
// (except for a space after the number and a missing suffix).
assertSuccessEquals(t, 0, FromHumanSize, "0 ")
assertError(t, FromHumanSize, " 0")
assertError(t, FromHumanSize, " 0b")
assertError(t, FromHumanSize, " 0B")
assertError(t, FromHumanSize, " 0 B")
assertError(t, FromHumanSize, "0b ")
assertError(t, FromHumanSize, "0B ")
assertError(t, FromHumanSize, "0 B ")
assertError(t, FromHumanSize, "")
assertError(t, FromHumanSize, "hello")
assertError(t, FromHumanSize, ".")
assertError(t, FromHumanSize, ". ")
assertError(t, FromHumanSize, " ")
assertError(t, FromHumanSize, " ")
assertError(t, FromHumanSize, " .")
assertError(t, FromHumanSize, " . ")
assertError(t, FromHumanSize, "-32")
assertError(t, FromHumanSize, "-32b")
assertError(t, FromHumanSize, "-32B")
assertError(t, FromHumanSize, "-32 b")
assertError(t, FromHumanSize, "-32 B")
assertError(t, FromHumanSize, "32b.")
assertError(t, FromHumanSize, "32B.")
assertError(t, FromHumanSize, "32 b.")
assertError(t, FromHumanSize, "32 B.")
assertError(t, FromHumanSize, "32 bb")
assertError(t, FromHumanSize, "32 BB")
assertError(t, FromHumanSize, "32 b b")
assertError(t, FromHumanSize, "32 B B")
assertError(t, FromHumanSize, "32 b")
assertError(t, FromHumanSize, "32 B")
assertError(t, FromHumanSize, " 32 ")
assertError(t, FromHumanSize, "32m b")
assertError(t, FromHumanSize, "32bm")
}
func TestRAMInBytes(t *testing.T) {
assertSuccessEquals(t, 32, RAMInBytes, "32")
assertSuccessEquals(t, 32, RAMInBytes, "32b")
assertSuccessEquals(t, 32, RAMInBytes, "32B")
assertSuccessEquals(t, 32*KiB, RAMInBytes, "32k")
assertSuccessEquals(t, 32*KiB, RAMInBytes, "32K")
assertSuccessEquals(t, 32*KiB, RAMInBytes, "32kb")
assertSuccessEquals(t, 32*KiB, RAMInBytes, "32Kb")
assertSuccessEquals(t, 32*KiB, RAMInBytes, "32Kib")
assertSuccessEquals(t, 32*KiB, RAMInBytes, "32KIB")
assertSuccessEquals(t, 32*MiB, RAMInBytes, "32Mb")
assertSuccessEquals(t, 32*GiB, RAMInBytes, "32Gb")
assertSuccessEquals(t, 32*TiB, RAMInBytes, "32Tb")
assertSuccessEquals(t, 32*PiB, RAMInBytes, "32Pb")
assertSuccessEquals(t, 32*PiB, RAMInBytes, "32PB")
assertSuccessEquals(t, 32*PiB, RAMInBytes, "32P")
assertSuccessEquals(t, 32, RAMInBytes, "32.3")
tmp := 32.3 * MiB
assertSuccessEquals(t, int64(tmp), RAMInBytes, "32.3 mb")
tmp = 0.3 * MiB
assertSuccessEquals(t, int64(tmp), RAMInBytes, "0.3MB")
assertError(t, RAMInBytes, "")
assertError(t, RAMInBytes, "hello")
assertError(t, RAMInBytes, "-32")
assertError(t, RAMInBytes, " 32 ")
assertError(t, RAMInBytes, "32m b")
assertError(t, RAMInBytes, "32bm")
}
func BenchmarkParseSize(b *testing.B) {
for i := 0; i < b.N; i++ {
for _, s := range []string{
"", "32", "32b", "32 B", "32k", "32.5 K", "32kb", "32 Kb",
"32.8Mb", "32.9Gb", "32.777Tb", "32Pb", "0.3Mb", "-1",
} {
FromHumanSize(s)
RAMInBytes(s)
}
}
}
func assertEquals(t *testing.T, expected, actual interface{}) {
t.Helper()
if expected != actual {
t.Errorf("Expected '%v' but got '%v'", expected, actual)
}
}
// func that maps to the parse function signatures as testing abstraction
type parseFn func(string) (int64, error)
// Define 'String()' for pretty-print
func (fn parseFn) String() string {
fnName := runtime.FuncForPC(reflect.ValueOf(fn).Pointer()).Name()
return fnName[strings.LastIndex(fnName, ".")+1:]
}
func assertSuccessEquals(t *testing.T, expected int64, fn parseFn, arg string) {
t.Helper()
res, err := fn(arg)
if err != nil || res != expected {
t.Errorf("%s(\"%s\") -> expected '%d' but got '%d' with error '%v'", fn, arg, expected, res, err)
}
}
func assertError(t *testing.T, fn parseFn, arg string) {
t.Helper()
res, err := fn(arg)
if err == nil && res != -1 {
t.Errorf("%s(\"%s\") -> expected error but got '%d'", fn, arg, res)
}
}