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a293b2bf94
Travis seems to be having issues pulling deps, so we'll have to check in the vendor directory and prevent the makefile from trying to regenerate it normally.
71 lines
1.7 KiB
Markdown
71 lines
1.7 KiB
Markdown
gofuzz
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======
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gofuzz is a library for populating go objects with random values.
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[](https://godoc.org/github.com/google/gofuzz)
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[](https://travis-ci.org/google/gofuzz)
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This is useful for testing:
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* Do your project's objects really serialize/unserialize correctly in all cases?
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* Is there an incorrectly formatted object that will cause your project to panic?
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Import with ```import "github.com/google/gofuzz"```
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You can use it on single variables:
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```go
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f := fuzz.New()
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var myInt int
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f.Fuzz(&myInt) // myInt gets a random value.
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```
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You can use it on maps:
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```go
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f := fuzz.New().NilChance(0).NumElements(1, 1)
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var myMap map[ComplexKeyType]string
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f.Fuzz(&myMap) // myMap will have exactly one element.
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```
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Customize the chance of getting a nil pointer:
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```go
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f := fuzz.New().NilChance(.5)
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var fancyStruct struct {
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A, B, C, D *string
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}
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f.Fuzz(&fancyStruct) // About half the pointers should be set.
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```
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You can even customize the randomization completely if needed:
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```go
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type MyEnum string
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const (
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A MyEnum = "A"
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B MyEnum = "B"
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)
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type MyInfo struct {
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Type MyEnum
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AInfo *string
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BInfo *string
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}
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f := fuzz.New().NilChance(0).Funcs(
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func(e *MyInfo, c fuzz.Continue) {
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switch c.Intn(2) {
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case 0:
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e.Type = A
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c.Fuzz(&e.AInfo)
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case 1:
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e.Type = B
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c.Fuzz(&e.BInfo)
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}
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},
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)
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var myObject MyInfo
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f.Fuzz(&myObject) // Type will correspond to whether A or B info is set.
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```
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See more examples in ```example_test.go```.
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Happy testing!
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