105 lines
3.9 KiB
Go
105 lines
3.9 KiB
Go
/*
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Copyright 2022 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package library
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import (
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"github.com/google/cel-go/cel"
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"github.com/google/cel-go/common/decls"
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"github.com/google/cel-go/common/types"
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"testing"
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"k8s.io/apimachinery/pkg/util/sets"
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)
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func TestLibraryCompatibility(t *testing.T) {
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functionNames := sets.New[string]()
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for _, lib := range KnownLibraries() {
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for name := range lib.declarations() {
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functionNames[name] = struct{}{}
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}
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}
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// WARN: All library changes must follow
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// https://github.com/kubernetes/enhancements/tree/master/keps/sig-api-machinery/2876-crd-validation-expression-language#function-library-updates
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// and must track the functions here along with which Kubernetes version introduced them.
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knownFunctions := sets.New(
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// Kubernetes 1.24:
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"isSorted", "sum", "max", "min", "indexOf", "lastIndexOf", "find", "findAll", "url", "getScheme", "getHost", "getHostname",
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"getPort", "getEscapedPath", "getQuery", "isURL",
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// Kubernetes <1.27>:
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"path", "group", "serviceAccount", "resource", "subresource", "namespace", "name", "check", "allowed", "reason",
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// Kubernetes <1.28>:
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"errored", "error",
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// Kubernetes <1.29>:
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"add", "asApproximateFloat", "asInteger", "compareTo", "isGreaterThan", "isInteger", "isLessThan", "isQuantity", "quantity", "sign", "sub",
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// Kubernetes <1.30>:
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"ip", "family", "isUnspecified", "isLoopback", "isLinkLocalMulticast", "isLinkLocalUnicast", "isGlobalUnicast", "ip.isCanonical", "isIP", "cidr", "containsIP", "containsCIDR", "masked", "prefixLength", "isCIDR", "string",
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// Kubernetes <1.31>:
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"fieldSelector", "labelSelector", "validate", "format.named", "isSemver", "major", "minor", "patch", "semver",
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// Kubernetes <1.??>:
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)
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// TODO: test celgo function lists
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unexpected := functionNames.Difference(knownFunctions)
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missing := knownFunctions.Difference(functionNames)
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if len(unexpected) != 0 {
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t.Errorf("Expected all functions in the libraries to be assigned to a kubernetes release, but found the unexpected function names: %v", unexpected)
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}
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if len(missing) != 0 {
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t.Errorf("Expected all functions in the libraries to be assigned to a kubernetes release, but found the missing function names: %v", missing)
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}
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}
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// TestTypeRegistration ensures that all custom types defined and used by Kubernetes CEL libraries
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// are returned by library.Types(). Other tests depend on Types() to provide an up-to-date list of
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// types declared in a library.
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func TestTypeRegistration(t *testing.T) {
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for _, lib := range KnownLibraries() {
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registeredTypes := sets.New[*cel.Type]()
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usedTypes := sets.New[*cel.Type]()
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// scan all registered function declarations for the library
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for _, fn := range lib.declarations() {
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fn, err := decls.NewFunction("placeholder-not-used", fn...)
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if err != nil {
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t.Fatal(err)
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}
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for _, o := range fn.OverloadDecls() {
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// ArgTypes include both the receiver type (if present) and
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// all function argument types.
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for _, at := range o.ArgTypes() {
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switch at.Kind() {
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// User defined types are either Opaque or Struct.
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case types.OpaqueKind, types.StructKind:
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usedTypes.Insert(at)
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default:
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// skip
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}
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}
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}
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}
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for _, t := range lib.Types() {
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registeredTypes.Insert(t)
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}
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unregistered := usedTypes.Difference(registeredTypes)
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if len(unregistered) != 0 {
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t.Errorf("Expected types to be registered with the %s library Type() functions, but they were not: %v", lib.LibraryName(), unregistered)
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}
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}
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}
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