convert_test.go

Documentation: k8s.io/apiextensions-apiserver/pkg/apiserver/schema

     1  /*
     2  Copyright 2019 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package schema
    18  
    19  import (
    20  	"math/rand"
    21  	"reflect"
    22  	"testing"
    23  	"time"
    24  
    25  	"github.com/google/go-cmp/cmp"
    26  	fuzz "github.com/google/gofuzz"
    27  
    28  	"k8s.io/apiextensions-apiserver/pkg/apis/apiextensions"
    29  	apiextensionsv1beta1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
    30  	"k8s.io/apimachinery/pkg/util/json"
    31  )
    32  
    33  func TestStructuralRoundtripOrError(t *testing.T) {
    34  	f := fuzz.New()
    35  	seed := time.Now().UnixNano()
    36  	t.Logf("seed = %v", seed)
    37  	//seed = int64(1549012506261785182)
    38  	f.RandSource(rand.New(rand.NewSource(seed)))
    39  	f.Funcs(
    40  		func(s *apiextensions.JSON, c fuzz.Continue) {
    41  			*s = apiextensions.JSON(map[string]interface{}{"foo": float64(42.2)})
    42  		},
    43  		func(s *apiextensions.JSONSchemaPropsOrArray, c fuzz.Continue) {
    44  			c.FuzzNoCustom(s)
    45  			if s.Schema != nil {
    46  				s.JSONSchemas = nil
    47  			} else if s.JSONSchemas == nil {
    48  				s.Schema = &apiextensions.JSONSchemaProps{}
    49  			}
    50  		},
    51  		func(s *apiextensions.JSONSchemaPropsOrBool, c fuzz.Continue) {
    52  			c.FuzzNoCustom(s)
    53  			if s.Schema != nil {
    54  				s.Allows = false
    55  			}
    56  		},
    57  		func(s **string, c fuzz.Continue) {
    58  			c.FuzzNoCustom(s)
    59  			if *s != nil && **s == "" {
    60  				*s = nil
    61  			}
    62  		},
    63  	)
    64  
    65  	f.MaxDepth(2)
    66  	f.NilChance(0.5)
    67  
    68  	for i := 0; i < 10000; i++ {
    69  		// fuzz a random field in JSONSchemaProps
    70  		origSchema := &apiextensions.JSONSchemaProps{}
    71  		x := reflect.ValueOf(origSchema).Elem()
    72  		n := rand.Intn(x.NumField())
    73  		if name := x.Type().Field(n).Name; name == "Example" || name == "ExternalDocs" {
    74  			// we drop these intentionally
    75  			continue
    76  		}
    77  		f.Fuzz(x.Field(n).Addr().Interface())
    78  
    79  		// it roundtrips or NewStructural errors out. We should never drop anything
    80  		orig, err := NewStructural(origSchema)
    81  		if err != nil {
    82  			continue
    83  		}
    84  
    85  		// roundtrip through go-openapi, JSON, v1beta1 JSONSchemaProp, internal JSONSchemaProp
    86  		goOpenAPI := orig.ToKubeOpenAPI()
    87  		bs, err := json.Marshal(goOpenAPI)
    88  		if err != nil {
    89  			t.Fatal(err)
    90  		}
    91  		v1beta1Schema := &apiextensionsv1beta1.JSONSchemaProps{}
    92  		err = json.Unmarshal([]byte(bs), v1beta1Schema)
    93  		if err != nil {
    94  			t.Fatal(err)
    95  		}
    96  		internalSchema := &apiextensions.JSONSchemaProps{}
    97  		err = apiextensionsv1beta1.Convert_v1beta1_JSONSchemaProps_To_apiextensions_JSONSchemaProps(v1beta1Schema, internalSchema, nil)
    98  		if err != nil {
    99  			t.Fatal(err)
   100  		}
   101  
   102  		if !reflect.DeepEqual(origSchema, internalSchema) {
   103  			t.Fatalf("original and result differ: %v", cmp.Diff(origSchema, internalSchema))
   104  		}
   105  	}
   106  }
   107
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