|
| 1 | +package tests |
| 2 | + |
| 3 | +import ( |
| 4 | + "math/rand" |
| 5 | + "reflect" |
| 6 | + "testing" |
| 7 | + "time" |
| 8 | + |
| 9 | + "github.com/mitchellh/reflectwalk" |
| 10 | + "github.com/pioz/faker" |
| 11 | +) |
| 12 | + |
| 13 | +func TestFuzz(t *testing.T) { |
| 14 | + t.Parallel() |
| 15 | + |
| 16 | + seed := time.Now().UnixNano() |
| 17 | + rand.Seed(seed) |
| 18 | + t.Log("seed:", seed) |
| 19 | + |
| 20 | + c := &CoderValues{} |
| 21 | + |
| 22 | + // First, populate all struct fields with random values. |
| 23 | + faker.Build(c) |
| 24 | + |
| 25 | + // Then, we walk through the struct and unset fields based on a randomized |
| 26 | + // probability. |
| 27 | + reflectwalk.Walk(c, walker{rand: rand.Float64()}) |
| 28 | + |
| 29 | + // Finally, ensure the chart renders correctly. We only care that it renders, |
| 30 | + // not that it's valid Kubernetes spec. |
| 31 | + LoadChart(t).MustRender(t, func(cv *CoderValues) { *cv = *c }) |
| 32 | +} |
| 33 | + |
| 34 | +var _ reflectwalk.PrimitiveWalker = walker{} |
| 35 | +var _ reflectwalk.MapWalker = walker{} |
| 36 | +var _ reflectwalk.SliceWalker = walker{} |
| 37 | +var _ reflectwalk.ArrayWalker = walker{} |
| 38 | + |
| 39 | +// walker randomly unassigns values based on the specified random chance. |
| 40 | +type walker struct { |
| 41 | + rand float64 |
| 42 | +} |
| 43 | + |
| 44 | +func (w walker) Primitive(v reflect.Value) error { |
| 45 | + w.processValue(v) |
| 46 | + return nil |
| 47 | +} |
| 48 | + |
| 49 | +func (w walker) MapElem(_, _, _ reflect.Value) error { return nil } |
| 50 | +func (w walker) Map(v reflect.Value) error { |
| 51 | + w.processValue(v) |
| 52 | + return nil |
| 53 | +} |
| 54 | + |
| 55 | +func (w walker) SliceElem(_ int, _ reflect.Value) error { return nil } |
| 56 | +func (w walker) Slice(v reflect.Value) error { |
| 57 | + w.processValue(v) |
| 58 | + return nil |
| 59 | +} |
| 60 | +func (w walker) ArrayElem(_ int, _ reflect.Value) error { return nil } |
| 61 | +func (w walker) Array(v reflect.Value) error { |
| 62 | + w.processValue(v) |
| 63 | + return nil |
| 64 | +} |
| 65 | + |
| 66 | +func (w walker) processValue(v reflect.Value) { |
| 67 | + if v.CanSet() && rand.Float64() < w.rand { |
| 68 | + v.Set(reflect.Zero(v.Type())) |
| 69 | + } |
| 70 | +} |
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