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chore: fuzz testing (#190)
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‎.github/workflows/fuzz.yaml

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name: fuzz
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on:
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push:
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branches:
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- main
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pull_request:
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branches:
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- main
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workflow_dispatch:
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jobs:
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fuzz:
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runs-on: ubuntu-20.04
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steps:
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- name: Cancel previous runs
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uses: styfle/[email protected]
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if: github.event_type == 'pull_request'
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- name: Checkout source
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uses: actions/checkout@v2
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- name: Install Go
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uses: actions/setup-go@v2
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with:
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go-version: "^1.17"
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- name: Fuzz
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run: go test -run ^TestFuzz$ cdr.dev/enterprise-helm/tests -count=1000
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working-directory: tests

‎templates/rbac.yaml

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@@ -42,4 +42,4 @@ roleRef:
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kind: Role
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name: coder
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apiGroup: rbac.authorization.k8s.io
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{{- end }}
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{{- end }}

‎tests/fuzz_test.go

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package tests
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import (
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"math/rand"
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"reflect"
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"testing"
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"time"
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"github.com/mitchellh/reflectwalk"
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"github.com/pioz/faker"
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)
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func TestFuzz(t *testing.T) {
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t.Parallel()
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seed := time.Now().UnixNano()
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rand.Seed(seed)
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t.Log("seed:", seed)
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c := &CoderValues{}
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// First, populate all struct fields with random values.
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faker.Build(c)
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// Then, we walk through the struct and unset fields based on a randomized
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// probability.
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reflectwalk.Walk(c, walker{rand: rand.Float64()})
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// Finally, ensure the chart renders correctly. We only care that it renders,
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// not that it's valid Kubernetes spec.
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LoadChart(t).MustRender(t, func(cv *CoderValues) { *cv = *c })
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}
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var _ reflectwalk.PrimitiveWalker = walker{}
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var _ reflectwalk.MapWalker = walker{}
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var _ reflectwalk.SliceWalker = walker{}
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var _ reflectwalk.ArrayWalker = walker{}
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// walker randomly unassigns values based on the specified random chance.
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type walker struct {
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rand float64
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}
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func (w walker) Primitive(v reflect.Value) error {
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w.processValue(v)
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return nil
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}
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func (w walker) MapElem(_, _, _ reflect.Value) error { return nil }
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func (w walker) Map(v reflect.Value) error {
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w.processValue(v)
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return nil
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}
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func (w walker) SliceElem(_ int, _ reflect.Value) error { return nil }
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func (w walker) Slice(v reflect.Value) error {
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w.processValue(v)
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return nil
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}
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func (w walker) ArrayElem(_ int, _ reflect.Value) error { return nil }
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func (w walker) Array(v reflect.Value) error {
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w.processValue(v)
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return nil
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}
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func (w walker) processValue(v reflect.Value) {
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if v.CanSet() && rand.Float64() < w.rand {
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v.Set(reflect.Zero(v.Type()))
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}
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}

‎tests/go.mod

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@@ -4,6 +4,8 @@ go 1.17
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require (
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github.com/jinzhu/copier v0.3.4
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github.com/mitchellh/reflectwalk v1.0.2
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github.com/pioz/faker v1.7.2
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github.com/stretchr/testify v1.7.0
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golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1
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helm.sh/helm/v3 v3.7.1
@@ -31,7 +33,6 @@ require (
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github.com/imdario/mergo v0.3.12 // indirect
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github.com/json-iterator/go v1.1.11 // indirect
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github.com/mitchellh/copystructure v1.1.1 // indirect
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github.com/mitchellh/reflectwalk v1.0.1 // indirect
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github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
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github.com/modern-go/reflect2 v1.0.1 // indirect
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github.com/pkg/errors v0.9.1 // indirect

‎tests/go.sum

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@@ -592,8 +592,9 @@ github.com/mitchellh/mapstructure v1.1.2/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh
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github.com/mitchellh/mapstructure v1.4.1/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
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github.com/mitchellh/osext v0.0.0-20151018003038-5e2d6d41470f/go.mod h1:OkQIRizQZAeMln+1tSwduZz7+Af5oFlKirV/MSYes2A=
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github.com/mitchellh/reflectwalk v1.0.0/go.mod h1:mSTlrgnPZtwu0c4WaC2kGObEpuNDbx0jmZXqmk4esnw=
595-
github.com/mitchellh/reflectwalk v1.0.1 h1:FVzMWA5RllMAKIdUSC8mdWo3XtwoecrH79BY70sEEpE=
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github.com/mitchellh/reflectwalk v1.0.1/go.mod h1:mSTlrgnPZtwu0c4WaC2kGObEpuNDbx0jmZXqmk4esnw=
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github.com/mitchellh/reflectwalk v1.0.2 h1:G2LzWKi524PWgd3mLHV8Y5k7s6XUvT0Gef6zxSIeXaQ=
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github.com/mitchellh/reflectwalk v1.0.2/go.mod h1:mSTlrgnPZtwu0c4WaC2kGObEpuNDbx0jmZXqmk4esnw=
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github.com/moby/locker v1.0.1/go.mod h1:S7SDdo5zpBK84bzzVlKr2V0hz+7x9hWbYC/kq7oQppc=
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github.com/moby/spdystream v0.2.0/go.mod h1:f7i0iNDQJ059oMTcWxx8MA/zKFIuD/lY+0GqbN2Wy8c=
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github.com/moby/sys/mountinfo v0.4.0/go.mod h1:rEr8tzG/lsIZHBtN/JjGG+LMYx9eXgW2JI+6q0qou+A=
@@ -666,6 +667,8 @@ github.com/pelletier/go-toml v1.8.1/go.mod h1:T2/BmBdy8dvIRq1a/8aqjN41wvWlN4lrap
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github.com/pelletier/go-toml v1.9.3/go.mod h1:u1nR/EPcESfeI/szUZKdtJ0xRNbUoANCkoOuaOx1Y+c=
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github.com/peterbourgon/diskv v2.0.1+incompatible/go.mod h1:uqqh8zWWbv1HBMNONnaR/tNboyR3/BZd58JJSHlUSCU=
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github.com/phayes/freeport v0.0.0-20180830031419-95f893ade6f2/go.mod h1:iIss55rKnNBTvrwdmkUpLnDpZoAHvWaiq5+iMmen4AE=
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github.com/pioz/faker v1.7.2 h1:fterUcYCbMJ4TgFN8DSqhlwkgbSn9DfsQM1cadbPPw0=
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github.com/pioz/faker v1.7.2/go.mod h1:xSpay5w/oz1a6+ww0M3vfpe40pSIykeUPeWEc3TvVlc=
669672
github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
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github.com/pkg/errors v0.8.1-0.20171018195549-f15c970de5b7/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
671674
github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=

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