prometheus/vendor/github.com/google/gofuzz
Simon Pasquier c706b416bd vendor: run 'go mod vendor' from scratch
Signed-off-by: Simon Pasquier <spasquie@redhat.com>
2018-10-29 17:25:43 +01:00
..
.travis.yml vendor: run 'go mod vendor' from scratch 2018-10-29 17:25:43 +01:00
CONTRIBUTING.md kubernetes: use and vendor 1.5 client 2016-10-17 10:32:10 +02:00
doc.go kubernetes: use and vendor 1.5 client 2016-10-17 10:32:10 +02:00
fuzz.go kubernetes: use and vendor 1.5 client 2016-10-17 10:32:10 +02:00
LICENSE kubernetes: use and vendor 1.5 client 2016-10-17 10:32:10 +02:00
README.md vendor: commit vendor/ after running govendor sync 2018-10-29 17:25:42 +01:00

gofuzz

gofuzz is a library for populating go objects with random values.

GoDoc Travis

This is useful for testing:

  • Do your project's objects really serialize/unserialize correctly in all cases?
  • Is there an incorrectly formatted object that will cause your project to panic?

Import with import "github.com/google/gofuzz"

You can use it on single variables:

f := fuzz.New()
var myInt int
f.Fuzz(&myInt) // myInt gets a random value.

You can use it on maps:

f := fuzz.New().NilChance(0).NumElements(1, 1)
var myMap map[ComplexKeyType]string
f.Fuzz(&myMap) // myMap will have exactly one element.

Customize the chance of getting a nil pointer:

f := fuzz.New().NilChance(.5)
var fancyStruct struct {
  A, B, C, D *string
}
f.Fuzz(&fancyStruct) // About half the pointers should be set.

You can even customize the randomization completely if needed:

type MyEnum string
const (
        A MyEnum = "A"
        B MyEnum = "B"
)
type MyInfo struct {
        Type MyEnum
        AInfo *string
        BInfo *string
}

f := fuzz.New().NilChance(0).Funcs(
        func(e *MyInfo, c fuzz.Continue) {
                switch c.Intn(2) {
                case 0:
                        e.Type = A
                        c.Fuzz(&e.AInfo)
                case 1:
                        e.Type = B
                        c.Fuzz(&e.BInfo)
                }
        },
)

var myObject MyInfo
f.Fuzz(&myObject) // Type will correspond to whether A or B info is set.

See more examples in example_test.go.

Happy testing!