feat: add inner validation support with one level nesting for field v…

…alidators to validation-gen

staging/src/k8s.io/code-generator/cmd/validation-gen/output_tests/inner/validatefalse/doc.go

@@ -0,0 +1,45 @@
+/*
+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.
+*/
+
+// +k8s:validation-gen=TypeMeta
+// +k8s:validation-gen-scheme-registry=k8s.io/code-generator/cmd/validation-gen/testscheme.Scheme
+
+// Package inner contains test types for testing inner field validation tags.
+package inner
+
+import "k8s.io/code-generator/cmd/validation-gen/testscheme"
+
+var localSchemeBuilder = testscheme.New()
+
+// M1 represents the formerly anonymous struct used in T1.Simple.
+type M1 struct {
+	StringField  string            `json:"stringField"`
+	SliceField   []string          `json:"sliceField"`
+	PointerField *string           `json:"pointerField"`
+	MapField     map[string]string `json:"mapField"`
+}
+
+// T1 demonstrates validations for inner fields of structs.
+type T1 struct {
+	TypeMeta int `json:"typeMeta"`
+
+	// M1 struct with inner field validations
+	// +k8s:inner(StringField)=+validateFalse="inner T1.M1.StringField"
+	// +k8s:inner(SliceField)=+validateFalse="inner T1.M1.SliceField"
+	// +k8s:inner(PointerField)=+validateFalse="inner T1.M1.PointerField"
+	// +k8s:inner(MapField)=+validateFalse="inner T1.M1.MapField"
+	M1 M1 `json:"simple"`
+}

staging/src/k8s.io/code-generator/cmd/validation-gen/output_tests/inner/validatefalse/doc_test.go

@@ -0,0 +1,73 @@
+/*
+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 inner
+
+import (
+	"testing"
+
+	operation "k8s.io/apimachinery/pkg/api/operation"
+)
+
+func TestInnerValidationWithValidateTrue(t *testing.T) {
+	cases := []struct {
+		name          string
+		obj           *T1
+		expectedPaths []string
+		expectErrors  bool
+	}{
+		{
+			name: "simple inner validation",
+			obj: &T1{
+				M1: M1{
+					StringField:  "",
+					SliceField:   []string{},
+					PointerField: nil,
+					MapField:     map[string]string{},
+				},
+			},
+			expectedPaths: []string{"simple.stringField", "simple.sliceField", "simple.pointerField", "simple.mapField"},
+			expectErrors:  true,
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			opCtx := operation.Context{}
+			errs := Validate_T1(opCtx, tc.obj, tc.obj, nil)
+			if tc.expectErrors && len(errs) == 0 {
+				t.Error("expected validation errors but got none")
+			}
+			if !tc.expectErrors && len(errs) > 0 {
+				t.Errorf("unexpected validation errors: %v", errs)
+			}
+			expectedPathCount := 0
+			actualPaths := []string{}
+			for _, err := range errs {
+				actualPaths = append(actualPaths, err.Field)
+				for _, expectedPath := range tc.expectedPaths {
+					if err.Field == expectedPath {
+						expectedPathCount++
+					}
+				}
+
+			}
+			if tc.expectErrors && expectedPathCount != len(tc.expectedPaths) {
+				t.Errorf("expected error paths %q in %q", tc.expectedPaths, actualPaths)
+			}
+		})
+	}
+}

staging/src/k8s.io/code-generator/cmd/validation-gen/output_tests/my-test/doc.go

@@ -0,0 +1,35 @@
+/*
+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.
+*/
+
+// +k8s:validation-gen=TypeMeta
+// +k8s:validation-gen-scheme-registry=k8s.io/code-generator/cmd/validation-gen/testscheme.Scheme
+// +k8s:validation-gen-test-fixture=validateFalse
+
+// This is a test package.
+package keyonly
+
+import "k8s.io/code-generator/cmd/validation-gen/testscheme"
+
+var localSchemeBuilder = testscheme.New()
+
+// +validateFalse="type T1"
+type T1 struct {
+	TypeMeta int
+
+	// +validateFalse="field T1.MSS"
+	// +eachKey=+validateFalse="T1.MSS[keys]"
+	MSS map[string]string `json:"mss"`
+}

staging/src/k8s.io/code-generator/cmd/validation-gen/output_tests/my-test/testdata/validate-false.json

@@ -0,0 +1,11 @@
+{
+    "*keyonly.T1": {
+      "": [
+        "type T1"
+      ],
+      "mss": [
+        "T1.MSS[keys]",
+        "field T1.MSS"
+      ]
+    }
+  }