/
scanner_fuzz_test.go
83 lines (71 loc) · 1.93 KB
/
scanner_fuzz_test.go
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//go:build go1.18
// +build go1.18
package scanner_test
import (
"fmt"
"math/rand"
"reflect"
"testing"
_ "github.com/jinzhu/gorm/dialects/sqlite"
"github.com/matryer/is"
"go.senan.xyz/gonic/mockfs"
)
func FuzzScanner(f *testing.F) {
checkDelta := func(is *is.I, m *mockfs.MockFS, expSeen, expNew int) {
is.Helper()
ctx := m.ScanAndClean()
is.Equal(ctx.SeenTracks(), expSeen)
is.Equal(ctx.SeenTracksNew(), expNew)
is.Equal(ctx.TracksMissing(), 0)
is.Equal(ctx.AlbumsMissing(), 0)
is.Equal(ctx.ArtistsMissing(), 0)
is.Equal(ctx.GenresMissing(), 0)
}
f.Fuzz(func(t *testing.T, data []byte, seed int64) {
is := is.NewRelaxed(t)
m := mockfs.New(t)
const toAdd = 1000
for i := 0; i < toAdd; i++ {
path := fmt.Sprintf("artist-%d/album-%d/track-%d.flac", i/6, i/3, i)
m.AddTrack(path)
m.SetTags(path, func(tags *mockfs.Tags) error {
fuzzStruct(i, data, seed, tags)
return nil
})
}
checkDelta(is, m, toAdd, toAdd) // we added all tracks, 0 delta
checkDelta(is, m, toAdd, 0) // we added 0 tracks, 0 delta
})
}
func fuzzStruct(taken int, data []byte, seed int64, dest interface{}) {
if len(data) == 0 {
return
}
r := rand.New(rand.NewSource(seed))
v := reflect.ValueOf(dest)
for i := 0; i < v.Elem().NumField(); i++ {
if r.Float64() < 0.1 {
continue
}
take := int(r.Float64() * 12)
b := make([]byte, take)
for i := range b {
b[i] = data[(i+taken)%len(data)]
}
taken += take
switch f := v.Elem().Field(i); f.Kind() {
case reflect.Bool:
f.SetBool(b[0] < 128)
case reflect.String:
f.SetString(string(b))
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
f.SetInt(int64(b[0]))
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
f.SetUint(uint64(b[0]))
case reflect.Float32, reflect.Float64:
f.SetFloat(float64(b[0]))
case reflect.Struct:
fuzzStruct(taken, data, seed, f.Addr().Interface())
}
}
}