feat(update): add test for preserving create_time when "*" update mask

README.md

@@ -139,6 +139,7 @@ Suites
 | invalid name | Method should fail with InvalidArgument if provided name is not valid. | Generated only if all are true: <ul><li>has Update method</li></ul> |
 | update time | Field update_time should be updated when the resource is updated. | Generated only if all are true: <ul><li>has Create method</li><li>Create method does not return long-running operation</li><li>has Update method</li><li>Update method does not return long-running operation</li><li>has field 'update_time'</li></ul> |
 | persisted | The updated resource should be persisted and reachable with Get. | Generated only if all are true: <ul><li>has Create method</li><li>Create method does not return long-running operation</li><li>has Update method</li><li>Update method does not return long-running operation</li><li>has Get method</li></ul> |
+| preserve create_time | The field create_time should be preserved when a '*'-update mask is used. | Generated only if all are true: <ul><li>has Create method</li><li>Create method does not return long-running operation</li><li>has Update method</li><li>Update method does not return long-running operation</li><li>has field 'create_time'</li><li>resource has any required fields</li></ul> |
 | not found | Method should fail with NotFound if the resource does not exist. | Generated only if all are true: <ul><li>has Create method</li><li>Create method does not return long-running operation</li><li>has Update method</li></ul> |
 | invalid update mask | The method should fail with InvalidArgument if the update_mask is invalid. | Generated only if all are true: <ul><li>has Create method</li><li>Create method does not return long-running operation</li><li>has Update method</li><li>Update method has update_mask</li></ul> |
 | required fields | Method should fail with InvalidArgument if any required field is missing when called with '*' update_mask. | Generated only if all are true: <ul><li>has Create method</li><li>Create method does not return long-running operation</li><li>has Update method</li><li>resource has any required fields</li></ul> |

internal/aiptest/update/create_time.go

@@ -0,0 +1,52 @@
+package update
+
+import (
+	"strconv"
+
+	"github.com/einride/protoc-gen-go-aip-test/internal/ident"
+	"github.com/einride/protoc-gen-go-aip-test/internal/onlyif"
+	"github.com/einride/protoc-gen-go-aip-test/internal/suite"
+	"github.com/einride/protoc-gen-go-aip-test/internal/util"
+	"go.einride.tech/aip/reflect/aipreflect"
+	"google.golang.org/protobuf/compiler/protogen"
+)
+
+// nolint: gochecknoglobals
+var preserveCreateTime = suite.Test{
+	Name: "preserve create_time",
+	Doc: []string{
+		"The field create_time should be preserved when a '*'-update mask is used.",
+	},
+
+	OnlyIf: suite.OnlyIfs(
+		onlyif.HasMethod(aipreflect.MethodTypeCreate),
+		onlyif.MethodNotLRO(aipreflect.MethodTypeCreate),
+		onlyif.HasMethod(aipreflect.MethodTypeUpdate),
+		onlyif.MethodNotLRO(aipreflect.MethodTypeUpdate),
+		onlyif.HasField("create_time"),
+		onlyif.HasRequiredFields,
+	),
+	Generate: func(f *protogen.GeneratedFile, scope suite.Scope) error {
+		createMethod, _ := util.StandardMethod(scope.Service, scope.Resource, aipreflect.MethodTypeCreate)
+		if util.HasParent(scope.Resource) {
+			f.P("parent := ", ident.FixtureNextParent, "(t, false)")
+		}
+		util.MethodCreate{
+			Resource: scope.Resource,
+			Method:   createMethod,
+			Parent:   "parent",
+		}.Generate(f, "created", "err", ":=")
+		f.P(ident.AssertNilError, "(t, err)")
+		f.P("originalCreateTime := created.CreateTime")
+		updateMethod, _ := util.StandardMethod(scope.Service, scope.Resource, aipreflect.MethodTypeUpdate)
+		util.MethodUpdate{
+			Resource:   scope.Resource,
+			Method:     updateMethod,
+			Msg:        "created",
+			UpdateMask: []string{strconv.Quote("*")},
+		}.Generate(f, "updated", "err", ":=")
+		f.P(ident.AssertNilError, "(t, err)")
+		f.P(ident.AssertDeepEqual, "(t, originalCreateTime, updated.CreateTime,", ident.ProtocmpTransform, "())")
+		return nil
+	},
+}

internal/aiptest/update/update.go

@@ -18,6 +18,7 @@ var Suite = suite.Suite{
 		invalidName,
 		updateTime,
 		persisted,
+		preserveCreateTime,
 	},
 	TestGroups: []suite.TestGroup{
 		withResourceGroup,