k8s.io/apiserver@v0.31.1/pkg/cel/mutation/mock_test.go (about)

     1  /*
     2  Copyright 2024 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 mutation
    18  
    19  import (
    20  	"strings"
    21  
    22  	"github.com/google/cel-go/common/types"
    23  	"github.com/google/cel-go/common/types/ref"
    24  
    25  	"k8s.io/apiserver/pkg/cel/mutation/common"
    26  )
    27  
    28  // mockTypeResolver is a mock implementation of TypeResolver that
    29  // allows the object to contain any field.
    30  type mockTypeResolver struct {
    31  }
    32  
    33  // mockTypeRef is a mock implementation of TypeRef that
    34  // contains any field.
    35  type mockTypeRef struct {
    36  	objectType *types.Type
    37  	resolver   common.TypeResolver
    38  }
    39  
    40  func newMockTypeRef(resolver common.TypeResolver, name string) *mockTypeRef {
    41  	objectType := types.NewObjectType(name, common.ObjectTraits)
    42  	return &mockTypeRef{
    43  		objectType: objectType,
    44  		resolver:   resolver,
    45  	}
    46  }
    47  
    48  func (m *mockTypeRef) HasTrait(trait int) bool {
    49  	return common.ObjectTraits|trait != 0
    50  }
    51  
    52  func (m *mockTypeRef) TypeName() string {
    53  	return m.objectType.TypeName()
    54  }
    55  
    56  func (m *mockTypeRef) CELType() *types.Type {
    57  	return types.NewTypeTypeWithParam(m.objectType)
    58  }
    59  
    60  func (m *mockTypeRef) Field(name string) (*types.FieldType, bool) {
    61  	return &types.FieldType{
    62  		Type: types.DynType,
    63  		IsSet: func(target any) bool {
    64  			return true
    65  		},
    66  		GetFrom: func(target any) (any, error) {
    67  			return nil, nil
    68  		},
    69  	}, true
    70  }
    71  
    72  func (m *mockTypeRef) Val(fields map[string]ref.Val) ref.Val {
    73  	return common.NewObjectVal(m, fields)
    74  }
    75  
    76  func (m *mockTypeResolver) Resolve(name string) (common.TypeRef, bool) {
    77  	if strings.HasPrefix(name, common.RootTypeReferenceName) {
    78  		return newMockTypeRef(m, name), true
    79  	}
    80  	return nil, false
    81  }
    82  
    83  // mockTypeResolverForOptional behaves the same as mockTypeResolver
    84  // except returning a mockTypeRefForOptional instead of mockTypeRef
    85  type mockTypeResolverForOptional struct {
    86  	*mockTypeResolver
    87  }
    88  
    89  // mockTypeRefForOptional behaves the same as the underlying TypeRef
    90  // except treating "nonExisting" field as non-existing.
    91  // This is used for optional tests.
    92  type mockTypeRefForOptional struct {
    93  	common.TypeRef
    94  }
    95  
    96  // Field returns a mock FieldType, or false if the field should not exist.
    97  func (m *mockTypeRefForOptional) Field(name string) (*types.FieldType, bool) {
    98  	if name == "nonExisting" {
    99  		return nil, false
   100  	}
   101  	return m.TypeRef.Field(name)
   102  }
   103  
   104  func (m *mockTypeResolverForOptional) Resolve(name string) (common.TypeRef, bool) {
   105  	r, ok := m.mockTypeResolver.Resolve(name)
   106  	if ok {
   107  		return &mockTypeRefForOptional{TypeRef: r}, ok
   108  	}
   109  	return nil, false
   110  }