feat: Add rule for AIP-162 Delete Revision request name field behavior (

#761)

docs/rules/0162/delete-revision-request-name-behavior.md

@@ -0,0 +1,69 @@
+---
+rule:
+  aip: 162
+  name: [core, '0162', delete-revision-request-name-behavior]
+  summary: |
+    Delete Revision requests should annotate the `name` field with `google.api.field_behavior`.
+permalink: /162/delete-revision-request-name-behavior
+redirect_from:
+  - /0162/delete-revision-request-name-behavior
+---
+
+# Delete Revision requests: Name field behavior
+
+This rule enforces that all Delete Revision requests have
+`google.api.field_behavior` set to `REQUIRED` on their `string name` field, as
+mandated in [AIP-162][].
+
+## Details
+
+This rule looks at any message matching `Delete*RevisionRequest` and complains if the
+`name` field does not have a `google.api.field_behavior` annotation with a
+value of `REQUIRED`.
+
+## Examples
+
+**Incorrect** code for this rule:
+
+```proto
+// Incorrect.
+message DeleteBookRevisionRequest {
+  // The `google.api.field_behavior` annotation should also be included.
+  string name = 1 [
+    (google.api.resource_reference).type = "library.googleapis.com/Book"
+  ];
+}
+```
+
+**Correct** code for this rule:
+
+```proto
+// Correct.
+message DeleteBookRevisionRequest {
+  string name = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference).type = "library.googleapis.com/Book"
+  ];
+}
+```
+
+## Disabling
+
+If you need to violate this rule, use a leading comment above the field.
+Remember to also include an [aip.dev/not-precedent][] comment explaining why.
+
+```proto
+message DeleteBookRevisionRequest {
+  // (-- api-linter: core::0162::delete-revision-request-name-behavior=disabled
+  //     aip.dev/not-precedent: We need to do this because reasons. --)
+  string name = 1 [
+    (google.api.resource_reference).type = "library.googleapis.com/Book"
+  ];
+}
+```
+
+If you need to violate this rule for an entire file, place the comment at the
+top of the file.
+
+[aip-162]: https://aip.dev/162
+[aip.dev/not-precedent]: https://aip.dev/not-precedent

rules/aip0162/aip0162.go

@@ -39,6 +39,7 @@ func AddRules(r lint.RuleRegistry) error {
 		deleteRevisionHTTPMethod,
 		deleteRevisionHTTPURISuffix,
 		deleteRevisionRequestMessageName,
+		deleteRevisionRequestNameBehavior,
 		deleteRevisionRequestNameField,
 		rollbackHTTPBody,
 		rollbackHTTPMethod,

rules/aip0162/delete_revision_request_name_behavior.go

@@ -0,0 +1,29 @@
+// Copyright 2021 Google LLC
+//
+// 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
+//
+//     https://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 aip0162
+
+import (
+	"github.com/googleapis/api-linter/lint"
+	"github.com/googleapis/api-linter/rules/internal/utils"
+	"github.com/jhump/protoreflect/desc"
+)
+
+var deleteRevisionRequestNameBehavior = &lint.FieldRule{
+	Name: lint.NewRuleName(162, "delete-revision-request-name-behavior"),
+	OnlyIf: func(f *desc.FieldDescriptor) bool {
+		return isDeleteRevisionRequestMessage(f.GetOwner()) && f.GetName() == "name"
+	},
+	LintField: utils.LintRequiredField,
+}

rules/aip0162/delete_revision_request_name_behavior_test.go

@@ -0,0 +1,49 @@
+// Copyright 2021 Google LLC
+//
+// 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
+//
+//     https://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 aip0162
+
+import (
+	"testing"
+
+	"github.com/googleapis/api-linter/rules/internal/testutils"
+)
+
+func TestDeleteRevisionRequestNameBehavior(t *testing.T) {
+	for _, test := range []struct {
+		name      string
+		RPC       string
+		Field     string
+		FieldOpts string
+		problems  testutils.Problems
+	}{
+		{"Valid", "DeleteBookRevision", "name", " [(google.api.field_behavior) = REQUIRED]", nil},
+		{"Missing", "DeleteBookRevision", "name", "", testutils.Problems{{Message: "(google.api.field_behavior) = REQUIRED"}}},
+		{"IrrelevantMessage", "PurgeBooks", "name", "", nil},
+		{"IrrelevantField", "DeleteBookRevision", "something_else", "", nil},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			f := testutils.ParseProto3Tmpl(t, `
+				import "google/api/field_behavior.proto";
+				message {{.RPC}}Request {
+					string {{.Field}} = 1{{.FieldOpts}};
+				}
+			`, test)
+			field := f.GetMessageTypes()[0].GetFields()[0]
+			if diff := test.problems.SetDescriptor(field).Diff(deleteRevisionRequestNameBehavior.Lint(f)); diff != "" {
+				t.Errorf(diff)
+			}
+		})
+	}
+}