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Merge pull request #129028 from sttts/sttts-cel-test

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apiextensions: add pkg/test with CEL unit test helpers
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Kubernetes Prow Robot 2025-01-16 05:58:34 -08:00 committed by GitHub
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149
staging/src/k8s.io/apiextensions-apiserver/pkg/test/cel.go Normal file
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/*
Copyright 2024 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package test
import (
"context"
"fmt"
"os"
"testing"
"github.com/stretchr/testify/require"
"k8s.io/apiextensions-apiserver/pkg/apis/apiextensions"
apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
"k8s.io/apiextensions-apiserver/pkg/apiserver/schema"
"k8s.io/apiextensions-apiserver/pkg/apiserver/schema/cel"
"k8s.io/apimachinery/pkg/util/validation/field"
"k8s.io/apimachinery/pkg/util/yaml"
celconfig "k8s.io/apiserver/pkg/apis/cel"
)
// MustLoadManifest loads a CRD from a file and panics on error.
func MustLoadManifest[T any](t *testing.T, pth string) *T {
data, err := os.ReadFile(pth)
require.NoError(t, err)
var crd T
err = yaml.Unmarshal(data, &crd)
require.NoError(t, err)
return &crd
}
// FieldValidators extracts the CEL validators by version and JSONPath from a CRD and returns
// a validator func for testing against samples.
func FieldValidators(t *testing.T, crd *apiextensionsv1.CustomResourceDefinition) (validatorsByVersionByJSONPath map[string]map[string]CELValidateFunc) {
ret := map[string]map[string]CELValidateFunc{}
for _, v := range crd.Spec.Versions {
var internalSchema apiextensions.JSONSchemaProps
err := apiextensionsv1.Convert_v1_JSONSchemaProps_To_apiextensions_JSONSchemaProps(v.Schema.OpenAPIV3Schema, &internalSchema, nil)
require.NoError(t, err, "failed to convert JSONSchemaProps for version %s: %v", v.Name, err)
structuralSchema, err := schema.NewStructural(&internalSchema)
require.NoError(t, err, "failed to create StructuralSchema for version %s: %v", v.Name, err)
versionVals, err := findCEL(t, structuralSchema, true, field.NewPath("openAPIV3Schema"))
require.NoError(t, err, "failed to find CEL for version %s: %v", v.Name, err)
ret[v.Name] = versionVals
}
return ret
}
// VersionValidatorsFromFile extracts the CEL validators by version from a CRD file and returns
// a validator func for testing against samples.
func VersionValidatorsFromFile(t *testing.T, crdFilePath string) map[string]CELValidateFunc {
data, err := os.ReadFile(crdFilePath)
require.NoError(t, err)
var crd apiextensionsv1.CustomResourceDefinition
err = yaml.Unmarshal(data, &crd)
require.NoError(t, err)
ret := map[string]CELValidateFunc{}
for _, v := range crd.Spec.Versions {
var internalSchema apiextensions.JSONSchemaProps
err := apiextensionsv1.Convert_v1_JSONSchemaProps_To_apiextensions_JSONSchemaProps(v.Schema.OpenAPIV3Schema, &internalSchema, nil)
require.NoError(t, err, "failed to convert JSONSchemaProps for version %s: %v", v.Name, err)
structuralSchema, err := schema.NewStructural(&internalSchema)
require.NoError(t, err, "failed to create StructuralSchema for version %s: %v", v.Name, err)
ret[v.Name] = func(obj, old interface{}) field.ErrorList {
errs, _ := cel.NewValidator(structuralSchema, true, celconfig.RuntimeCELCostBudget).Validate(context.TODO(), nil, structuralSchema, obj, old, celconfig.PerCallLimit)
return errs
}
}
return ret
}
// VersionValidatorFromFile extracts the CEL validators for a given version from a CRD file and returns
// a validator func for testing against samples.
func VersionValidatorFromFile(t *testing.T, crdFilePath string, version string) (CELValidateFunc, error) {
vals := VersionValidatorsFromFile(t, crdFilePath)
if val, ok := vals[version]; ok {
return val, nil
}
return nil, fmt.Errorf("version %s not found", version)
}
// CELValidateFunc tests a sample object against a CEL validator.
type CELValidateFunc func(obj, old interface{}) field.ErrorList
func findCEL(t *testing.T, s *schema.Structural, root bool, pth *field.Path) (map[string]CELValidateFunc, error) {
ret := map[string]CELValidateFunc{}
if len(s.XValidations) > 0 {
s := *s
pth := *pth
ret[pth.String()] = func(obj, old interface{}) field.ErrorList {
errs, _ := cel.NewValidator(&s, root, celconfig.RuntimeCELCostBudget).Validate(context.TODO(), &pth, &s, obj, old, celconfig.PerCallLimit)
return errs
}
}
for k, v := range s.Properties {
v := v
sub, err := findCEL(t, &v, false, pth.Child("properties").Child(k))
if err != nil {
return nil, err
}
for pth, val := range sub {
ret[pth] = val
}
}
if s.Items != nil {
sub, err := findCEL(t, s.Items, false, pth.Child("items"))
if err != nil {
return nil, err
}
for pth, val := range sub {
ret[pth] = val
}
}
if s.AdditionalProperties != nil && s.AdditionalProperties.Structural != nil {
sub, err := findCEL(t, s.AdditionalProperties.Structural, false, pth.Child("additionalProperties"))
if err != nil {
return nil, err
}
for pth, val := range sub {
ret[pth] = val
}
}
return ret, nil
}

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staging/src/k8s.io/apiextensions-apiserver/pkg/test/example/apiexports_crd.yaml Normal file
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apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
annotations:
controller-gen.kubebuilder.io/version: v0.15.0
name: apiexports.apis.kcp.io
spec:
group: apis.kcp.io
names:
categories:
- kcp
kind: APIExport
listKind: APIExportList
plural: apiexports
singular: apiexport
scope: Cluster
versions:
- additionalPrinterColumns:
- jsonPath: .metadata.creationTimestamp
name: Age
type: date
- jsonPath: .status.conditions[?(@.type=="VirtualWorkspaceURLsReady")].status
name: Ready
type: string
name: v1alpha1
schema:
openAPIV3Schema:
description: |-
APIExport registers an API and implementation to allow consumption by others
through APIBindings.
properties:
apiVersion:
description: |-
APIVersion defines the versioned schema of this representation of an object.
Servers should convert recognized schemas to the latest internal value, and
may reject unrecognized values.
More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources
type: string
kind:
description: |-
Kind is a string value representing the REST resource this object represents.
Servers may infer this from the endpoint the client submits requests to.
Cannot be updated.
In CamelCase.
More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds
type: string
metadata:
type: object
spec:
description: Spec holds the desired state.
properties:
identity:
description: |-
identity points to a secret that contains the API identity in the 'key' file.
The API identity determines an unique etcd prefix for objects stored via this
APIExport.
Different APIExport in a workspace can share a common identity, or have different
ones. The identity (the secret) can also be transferred to another workspace
when the APIExport is moved.
The identity is a secret of the API provider. The APIBindings referencing this APIExport
will store a derived, non-sensitive value of this identity.
The identity of an APIExport cannot be changed. A derived, non-sensitive value of
the identity key is stored in the APIExport status and this value is immutable.
The identity is defaulted. A secret with the name of the APIExport is automatically
created.
properties:
secretRef:
description: secretRef is a reference to a secret that contains
the API identity in the 'key' file.
properties:
name:
description: name is unique within a namespace to reference
a secret resource.
type: string
namespace:
description: namespace defines the space within which the
secret name must be unique.
type: string
type: object
x-kubernetes-map-type: atomic
type: object
latestResourceSchemas:
description: |-
latestResourceSchemas records the latest APIResourceSchemas that are exposed
with this APIExport.
The schemas can be changed in the life-cycle of the APIExport. These changes
have no effect on existing APIBindings, but only on newly bound ones.
For updating existing APIBindings, use an APIDeployment keeping bound
workspaces up-to-date.
items:
type: string
type: array
x-kubernetes-list-type: set
maximalPermissionPolicy:
description: |-
maximalPermissionPolicy will allow for a service provider to set an upper bound on what is allowed
for a consumer of this API. If the policy is not set, no upper bound is applied,
i.e the consuming users can do whatever the user workspace allows the user to do.
The policy consists of RBAC (Cluster)Roles and (Cluster)Bindings. A request of a user in
a workspace that binds to this APIExport via an APIBinding is additionally checked against
these rules, with the user name and the groups prefixed with `apis.kcp.io:binding:`.
For example: assume a user `adam` with groups `system:authenticated` and `a-team` binds to
this APIExport in another workspace root:org:ws. Then a request in that workspace
against a resource of this APIExport is authorized as every other request in that workspace,
but in addition the RBAC policy here in the APIExport workspace has to grant access to the
user `apis.kcp.io:binding:adam` with the groups `apis.kcp.io:binding:system:authenticated`
and `apis.kcp.io:binding:a-team`.
oneOf:
- required:
- local
properties:
local:
description: local is the policy that is defined in same workspace
as the API Export.
type: object
type: object
permissionClaims:
description: |-
permissionClaims make resources available in APIExport's virtual workspace that are not part
of the actual APIExport resources.
PermissionClaims are optional and should be the least access necessary to complete the functions
that the service provider needs. Access is asked for on a GroupResource + identity basis.
PermissionClaims must be accepted by the user's explicit acknowledgement. Hence, when claims
change, the respecting objects are not visible immediately.
PermissionClaims overlapping with the APIExport resources are ignored.
items:
description: |-
PermissionClaim identifies an object by GR and identity hash.
Its purpose is to determine the added permissions that a service provider may
request and that a consumer may accept and allow the service provider access to.
properties:
all:
description: |-
all claims all resources for the given group/resource.
This is mutually exclusive with resourceSelector.
type: boolean
group:
default: ""
description: |-
group is the name of an API group.
For core groups this is the empty string '""'.
pattern: ^(|[a-z0-9]([-a-z0-9]*[a-z0-9](\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*)?)$
type: string
identityHash:
description: |-
This is the identity for a given APIExport that the APIResourceSchema belongs to.
The hash can be found on APIExport and APIResourceSchema's status.
It will be empty for core types.
Note that one must look this up for a particular KCP instance.
type: string
resource:
description: |-
resource is the name of the resource.
Note: it is worth noting that you can not ask for permissions for resource provided by a CRD
not provided by an api export.
pattern: ^[a-z][-a-z0-9]*[a-z0-9]$
type: string
resourceSelector:
description: resourceSelector is a list of claimed resource
selectors.
items:
properties:
name:
description: |-
name of an object within a claimed group/resource.
It matches the metadata.name field of the underlying object.
If namespace is unset, all objects matching that name will be claimed.
maxLength: 253
minLength: 1
pattern: ^([a-z0-9][-a-z0-9_.]*)?[a-z0-9]$
type: string
namespace:
description: |-
namespace containing the named object. Matches metadata.namespace field.
If "name" is unset, all objects from the namespace are being claimed.
minLength: 1
type: string
type: object
x-kubernetes-validations:
- message: at least one field must be set
rule: has(self.__namespace__) || has(self.name)
type: array
required:
- resource
type: object
x-kubernetes-validations:
- message: either "all" or "resourceSelector" must be set
rule: (has(self.all) && self.all) != (has(self.resourceSelector)
&& size(self.resourceSelector) > 0)
type: array
x-kubernetes-list-map-keys:
- group
- resource
x-kubernetes-list-type: map
type: object
status:
description: Status communicates the observed state.
properties:
conditions:
description: conditions is a list of conditions that apply to the
APIExport.
items:
description: Condition defines an observation of a object operational
state.
properties:
lastTransitionTime:
description: |-
Last time the condition transitioned from one status to another.
This should be when the underlying condition changed. If that is not known, then using the time when
the API field changed is acceptable.
format: date-time
type: string
message:
description: |-
A human readable message indicating details about the transition.
This field may be empty.
type: string
reason:
description: |-
The reason for the condition's last transition in CamelCase.
The specific API may choose whether or not this field is considered a guaranteed API.
This field may not be empty.
type: string
severity:
description: |-
Severity provides an explicit classification of Reason code, so the users or machines can immediately
understand the current situation and act accordingly.
The Severity field MUST be set only when Status=False.
type: string
status:
description: Status of the condition, one of True, False, Unknown.
type: string
type:
description: |-
Type of condition in CamelCase or in foo.example.com/CamelCase.
Many .condition.type values are consistent across resources like Available, but because arbitrary conditions
can be useful (see .node.status.conditions), the ability to deconflict is important.
type: string
required:
- lastTransitionTime
- status
- type
type: object
type: array
identityHash:
description: |-
identityHash is the hash of the API identity key of this APIExport. This value
is immutable as soon as it is set.
type: string
virtualWorkspaces:
description: |-
virtualWorkspaces contains all APIExport virtual workspace URLs.
Deprecated: use APIExportEndpointSlice.status.endpoints instead
items:
properties:
url:
description: url is an APIExport virtual workspace URL.
minLength: 1
type: string
required:
- url
type: object
type: array
type: object
type: object
served: true
storage: true
subresources:
status: {}

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/*
Copyright 2024 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package example
import (
"testing"
"github.com/stretchr/testify/require"
apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
apitest "k8s.io/apiextensions-apiserver/pkg/test"
)
func TestAPIExportPermissionClaimCELValidation(t *testing.T) {
testCases := []struct {
name string
current, old map[string]interface{}
wantErrs []string
}{
{
name: "nothing is set",
current: map[string]interface{}{},
wantErrs: []string{
"openAPIV3Schema.properties.spec.properties.permissionClaims.items: Invalid value: \"object\": either \"all\" or \"resourceSelector\" must be set",
},
},
{
name: "all is true",
current: map[string]interface{}{
"all": true,
},
},
{
name: "all is true, resourceSelector is nil",
current: map[string]interface{}{
"all": true,
"resourceSelector": nil,
},
},
{
name: "all is true, resourceSelector is empty",
current: map[string]interface{}{
"all": true,
"resourceSelector": []interface{}{},
},
},
{
name: "all is true and resourceSelector is set",
current: map[string]interface{}{
"all": true,
"resourceSelector": []interface{}{
map[string]interface{}{"namespace": "foo"},
},
},
wantErrs: []string{
"openAPIV3Schema.properties.spec.properties.permissionClaims.items: Invalid value: \"object\": either \"all\" or \"resourceSelector\" must be set",
},
},
{
name: "all is unset and resourceSelector is nil",
current: map[string]interface{}{
"resourceSelector": nil,
},
wantErrs: []string{
"openAPIV3Schema.properties.spec.properties.permissionClaims.items: Invalid value: \"object\": either \"all\" or \"resourceSelector\" must be set",
},
},
{
name: "all is unset and resourceSelector is empty",
current: map[string]interface{}{
"resourceSelector": []interface{}{},
},
wantErrs: []string{
"openAPIV3Schema.properties.spec.properties.permissionClaims.items: Invalid value: \"object\": either \"all\" or \"resourceSelector\" must be set",
},
},
{
name: "resourceSelector is set",
current: map[string]interface{}{
"resourceSelector": []interface{}{
map[string]interface{}{"namespace": "foo"},
},
},
},
{
name: "all is false and resourceSelector is nil",
current: map[string]interface{}{
"all": false,
"resourceSelector": nil,
},
wantErrs: []string{
"openAPIV3Schema.properties.spec.properties.permissionClaims.items: Invalid value: \"object\": either \"all\" or \"resourceSelector\" must be set",
},
},
{
name: "empty resource selector",
current: map[string]interface{}{
"all": false,
"resourceSelector": []interface{}{},
},
wantErrs: []string{
"openAPIV3Schema.properties.spec.properties.permissionClaims.items: Invalid value: \"object\": either \"all\" or \"resourceSelector\" must be set",
},
},
{
name: "logicalcluster fine with non-empty identityHash",
current: map[string]interface{}{
"group": "core.kcp.io",
"resource": "logicalclusters",
"identityHash": "abc",
"all": true,
},
},
}
validators := apitest.FieldValidators(t, apitest.MustLoadManifest[apiextensionsv1.CustomResourceDefinition](t, "apiexports_crd.yaml"))
for _, tc := range testCases {
pth := "openAPIV3Schema.properties.spec.properties.permissionClaims.items"
validator, found := validators["v1alpha1"][pth]
require.True(t, found, "failed to find validator for %s", pth)
t.Run(tc.name, func(t *testing.T) {
errs := validator(tc.current, tc.old)
t.Log(errs)
if got := len(errs); got != len(tc.wantErrs) {
t.Errorf("expected errors %v, got %v", len(tc.wantErrs), len(errs))
return
}
for i := range tc.wantErrs {
got := errs[i].Error()
if got != tc.wantErrs[i] {
t.Errorf("want error %q, got %q", tc.wantErrs[i], got)
}
}
})
}
}
func TestResourceSelectorCELValidation(t *testing.T) {
testCases := []struct {
name string
current, old map[string]interface{}
wantErrs []string
}{
{
name: "none is set",
current: map[string]interface{}{
"name": nil,
"namespace": nil,
},
wantErrs: []string{
"openAPIV3Schema.properties.spec.properties.permissionClaims.items.properties.resourceSelector.items: Invalid value: \"object\": at least one field must be set",
},
},
{
name: "namespace is set",
current: map[string]interface{}{
"name": nil,
"namespace": "foo",
},
},
{
name: "name is set",
current: map[string]interface{}{
"name": "foo",
"namespace": nil,
},
},
{
name: "both name and namespace are set",
current: map[string]interface{}{
"name": "foo",
"namespace": "bar",
},
},
}
validators := apitest.FieldValidators(t, apitest.MustLoadManifest[apiextensionsv1.CustomResourceDefinition](t, "apiexports_crd.yaml"))
for _, tc := range testCases {
pth := "openAPIV3Schema.properties.spec.properties.permissionClaims.items.properties.resourceSelector.items"
validator, found := validators["v1alpha1"][pth]
require.True(t, found, "failed to find validator for %s", pth)
t.Run(tc.name, func(t *testing.T) {
errs := validator(tc.current, tc.old)
t.Log(errs)
if got := len(errs); got != len(tc.wantErrs) {
t.Errorf("expected errors %v, got %v", len(tc.wantErrs), len(errs))
return
}
for i := range tc.wantErrs {
got := errs[i].Error()
if got != tc.wantErrs[i] {
t.Errorf("want error %q, got %q", tc.wantErrs[i], got)
}
}
})
}
}
func TestAPIExportPermissionClaimPattern(t *testing.T) {
testCases := []struct {
name string
value string
wantError string
}{
{
name: "middle dot",
value: "abc.123",
},
{
name: "middle dash",
value: "abc-123",
},
{
name: "mixed dash and dot",
value: "ab-c1.23",
},
{
name: "dot at the end",
value: "abc123.",
wantError: "pattern mismatch",
},
{
name: "dot at the beginning",
value: ".abc123",
wantError: "pattern mismatch",
},
{
name: "dash at the end",
value: "abc123-",
wantError: "pattern mismatch",
},
{
name: "dash at the beginning",
value: "-abc123",
wantError: "pattern mismatch",
},
{
name: "uppercase",
value: "ABC",
wantError: "pattern mismatch",
},
{
name: "invalid exclamation marks",
value: "!!!",
wantError: "pattern mismatch",
},
{
name: "empty",
value: "",
wantError: "pattern mismatch",
},
}
validators := apitest.PatternValidators(t, apitest.MustLoadManifest[apiextensionsv1.CustomResourceDefinition](t, "apiexports_crd.yaml"))
for _, tc := range testCases {
pth := "openAPIV3Schema.properties.spec.properties.permissionClaims.items.properties.resourceSelector.items.properties.name"
validator, found := validators["v1alpha1"][pth]
require.True(t, found, "failed to find validator for %s", pth)
t.Run(tc.name, func(t *testing.T) {
err := validator(tc.value)
got := ""
if err != nil {
got = err.Error()
}
if got != tc.wantError {
t.Errorf("want error %q, got %q", tc.wantError, got)
}
})
}
}

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/*
Copyright 2024 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package test
import (
"errors"
"regexp"
"testing"
"github.com/stretchr/testify/require"
"k8s.io/apiextensions-apiserver/pkg/apis/apiextensions"
apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
"k8s.io/apiextensions-apiserver/pkg/apiserver/schema"
"k8s.io/apimachinery/pkg/util/validation/field"
)
// PatternValidators extracts the pattern validators by version and JSONPath from a CRD and returns
// a validator func for testing against samples.
func PatternValidators(t *testing.T, crd *apiextensionsv1.CustomResourceDefinition) (validatorsByVersionByJSONPath map[string]map[string]PatternValidateFunc) {
ret := map[string]map[string]PatternValidateFunc{}
for _, v := range crd.Spec.Versions {
var internalSchema apiextensions.JSONSchemaProps
err := apiextensionsv1.Convert_v1_JSONSchemaProps_To_apiextensions_JSONSchemaProps(v.Schema.OpenAPIV3Schema, &internalSchema, nil)
require.NoError(t, err, "failed to convert JSONSchemaProps for version %s: %v", v.Name, err)
structuralSchema, err := schema.NewStructural(&internalSchema)
require.NoError(t, err, "failed to create StructuralSchema for version %s: %v", v.Name, err)
versionVals, err := findPattern(t, structuralSchema, field.NewPath("openAPIV3Schema"))
require.NoError(t, err, "failed to find CEL for version %s: %v", v.Name, err)
ret[v.Name] = versionVals
}
return ret
}
type PatternValidateFunc func(obj interface{}) error
func findPattern(t *testing.T, s *schema.Structural, pth *field.Path) (map[string]PatternValidateFunc, error) {
ret := map[string]PatternValidateFunc{}
if len(s.ValueValidation.Pattern) > 0 {
s := *s
pth := *pth
ret[pth.String()] = func(obj interface{}) error {
p, err := regexp.Compile(s.ValueValidation.Pattern)
if err != nil {
return err
}
if p.MatchString(obj.(string)) {
return nil
}
return errors.New("pattern mismatch")
}
}
for k, v := range s.Properties {
v := v
sub, err := findPattern(t, &v, pth.Child("properties").Child(k))
if err != nil {
return nil, err
}
for pth, val := range sub {
ret[pth] = val
}
}
if s.Items != nil {
sub, err := findPattern(t, s.Items, pth.Child("items"))
if err != nil {
return nil, err
}
for pth, val := range sub {
ret[pth] = val
}
}
if s.AdditionalProperties != nil && s.AdditionalProperties.Structural != nil {
sub, err := findPattern(t, s.AdditionalProperties.Structural, pth.Child("additionalProperties"))
if err != nil {
return nil, err
}
for pth, val := range sub {
ret[pth] = val
}
}
return ret, nil
}