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|
package strconv
import (
"fmt"
"math"
"math/rand"
"testing"
"github.com/tdewolff/test"
)
func TestParseInt(t *testing.T) {
intTests := []struct {
i string
expected int64
}{
{"5", 5},
{"99", 99},
{"999", 999},
{"-5", -5},
{"+5", 5},
{"9223372036854775807", 9223372036854775807},
{"-9223372036854775807", -9223372036854775807},
{"-9223372036854775808", -9223372036854775808},
}
for _, tt := range intTests {
t.Run(fmt.Sprint(tt.i), func(t *testing.T) {
i, n := ParseInt([]byte(tt.i))
test.T(t, n, len(tt.i))
test.T(t, i, tt.expected)
})
}
}
func TestParseIntError(t *testing.T) {
intTests := []struct {
i string
n int
expected int64
}{
{"a", 0, 0},
{"+", 0, 0},
{"9223372036854775808", 0, 0},
{"-9223372036854775809", 0, 0},
{"18446744073709551620", 0, 0},
}
for _, tt := range intTests {
t.Run(fmt.Sprint(tt.i), func(t *testing.T) {
i, n := ParseInt([]byte(tt.i))
test.T(t, n, tt.n)
test.T(t, i, tt.expected)
})
}
}
func FuzzParseInt(f *testing.F) {
f.Add("5")
f.Add("-99")
f.Add("9223372036854775807")
f.Add("-9223372036854775808")
f.Fuzz(func(t *testing.T, s string) {
ParseInt([]byte(s))
})
}
func TestParseUint(t *testing.T) {
intTests := []struct {
i string
expected uint64
}{
{"5", 5},
{"99", 99},
{"999", 999},
{"18446744073709551615", 18446744073709551615},
}
for _, tt := range intTests {
t.Run(fmt.Sprint(tt.i), func(t *testing.T) {
i, n := ParseUint([]byte(tt.i))
test.T(t, n, len(tt.i))
test.T(t, i, tt.expected)
})
}
}
func TestParseUintError(t *testing.T) {
intTests := []struct {
i string
n int
expected uint64
}{
{"a", 0, 0},
{"18446744073709551616", 0, 0},
{"-1", 0, 0},
}
for _, tt := range intTests {
t.Run(fmt.Sprint(tt.i), func(t *testing.T) {
i, n := ParseUint([]byte(tt.i))
test.T(t, n, tt.n)
test.T(t, i, tt.expected)
})
}
}
func FuzzParseUint(f *testing.F) {
f.Add("5")
f.Add("99")
f.Add("18446744073709551615")
f.Fuzz(func(t *testing.T, s string) {
ParseUint([]byte(s))
})
}
func TestLenInt(t *testing.T) {
lenIntTests := []struct {
i int64
expected int
}{
{0, 1},
{1, 1},
{10, 2},
{99, 2},
{9223372036854775807, 19},
{-9223372036854775808, 19},
// coverage
{100, 3},
{1000, 4},
{10000, 5},
{100000, 6},
{1000000, 7},
{10000000, 8},
{100000000, 9},
{1000000000, 10},
{10000000000, 11},
{100000000000, 12},
{1000000000000, 13},
{10000000000000, 14},
{100000000000000, 15},
{1000000000000000, 16},
{10000000000000000, 17},
{100000000000000000, 18},
{1000000000000000000, 19},
}
for _, tt := range lenIntTests {
t.Run(fmt.Sprint(tt.i), func(t *testing.T) {
test.T(t, LenInt(tt.i), tt.expected)
})
}
}
////////////////////////////////////////////////////////////////
var num []int64
func TestMain(t *testing.T) {
for j := 0; j < 1000; j++ {
num = append(num, rand.Int63n(1000))
}
}
func BenchmarkLenIntLog(b *testing.B) {
n := 0
for i := 0; i < b.N; i++ {
for j := 0; j < 1000; j++ {
n += int(math.Log10(math.Abs(float64(num[j])))) + 1
}
}
}
func BenchmarkLenIntSwitch(b *testing.B) {
n := 0
for i := 0; i < b.N; i++ {
for j := 0; j < 1000; j++ {
n += LenInt(num[j])
}
}
}
|
