ListResource: null handling

internal/fwserver/server_listresource.go

@@ -127,15 +127,15 @@ func processListResult(req list.ListRequest, result list.ListResult) ListResult
 		return ListResult(result)
 	}
 
-	if result.Identity == nil { // TODO: is result.Identity.Raw.IsNull() a practical concern?
+	if result.Identity == nil || result.Identity.Raw.IsNull() {
 		return ListResultError(
 			"Incomplete List Result",
 			"The provider did not populate the Identity field in the ListResourceResult. This may be due to an error in the provider's implementation.",
 		)
 	}
 
 	if req.IncludeResource {
-		if result.Resource == nil { // TODO: is result.Resource.Raw.IsNull() a practical concern?
+		if result.Resource == nil || result.Resource.Raw.IsNull() {
 			result.Diagnostics.AddWarning(
 				"Incomplete List Result",
 				"The provider did not populate the Resource field in the ListResourceResult. This may be due to the provider not supporting this functionality or an error in the provider's implementation.",

internal/fwserver/server_listresource_test.go

@@ -214,6 +214,38 @@ func TestServerListResource(t *testing.T) {
 				},
 			},
 		},
+		"error-on-null-resource-identity": {
+			server: &fwserver.Server{
+				Provider: &testprovider.Provider{},
+			},
+			request: &fwserver.ListRequest{
+				Config: &tfsdk.Config{},
+				ListResource: &testprovider.ListResource{
+					ListMethod: func(ctx context.Context, req list.ListRequest, resp *list.ListResultsStream) {
+						resp.Results = slices.Values([]list.ListResult{
+							{
+								Identity: &tfsdk.ResourceIdentity{},
+								Resource: &tfsdk.Resource{
+									Schema: testSchema,
+									Raw:    testResourceValue1,
+								},
+								DisplayName: "Test Resource 1",
+							},
+						})
+					},
+				},
+			},
+			expectedStreamEvents: []fwserver.ListResult{
+				{
+					Diagnostics: diag.Diagnostics{
+						diag.NewErrorDiagnostic(
+							"Incomplete List Result",
+							"The provider did not populate the Identity field in the ListResourceResult. This may be due to an error in the provider's implementation.",
+						),
+					},
+				},
+			},
+		},
 		"warning-on-missing-resource": {
 			server: &fwserver.Server{
 				Provider: &testprovider.Provider{},

internal/proto5server/server_listresource_test.go

@@ -106,7 +106,11 @@ func TestServerListResource(t *testing.T) {
 						continue
 					}
 
-					result := req.ToListResult(ctx, resources[name].ThingResourceIdentity, resources[name], name)
+					result := req.NewListResult()
+					result.Identity.Set(ctx, resources[name].ThingResourceIdentity)
+					result.Resource.Set(ctx, resources[name])
+					result.DisplayName = name
+
 					results = append(results, result)
 				}
 				resp.Results = slices.Values(results)
@@ -124,7 +128,9 @@ func TestServerListResource(t *testing.T) {
 		}
 
 		r.ListMethod = func(ctx context.Context, req list.ListRequest, resp *list.ListResultsStream) {
-			result := req.ToListResult(ctx, resources["plateau"].ThingResourceIdentity, nil, "plateau")
+			result := req.NewListResult()
+			result.Identity.Set(ctx, resources["plateau"].ThingResourceIdentity)
+			result.DisplayName = "plateau"
 
 			resp.Results = slices.Values([]list.ListResult{result})
 		}
@@ -264,6 +270,7 @@ func TestServerListResource(t *testing.T) {
 				{
 					DisplayName: "plateau",
 					Identity:    expectedResourceIdentities["plateau"],
+					Resource:    &tfprotov5.DynamicValue{MsgPack: []uint8{0xc0}},
 					Diagnostics: []*tfprotov5.Diagnostic{
 						{
 							Severity: tfprotov5.DiagnosticSeverityWarning,

internal/proto6server/server_listresource_test.go

@@ -106,7 +106,11 @@ func TestServerListResource(t *testing.T) {
 						continue
 					}
 
-					result := req.ToListResult(ctx, resources[name].ThingResourceIdentity, resources[name], name)
+					result := req.NewListResult()
+					result.Identity.Set(ctx, resources[name].ThingResourceIdentity)
+					result.Resource.Set(ctx, resources[name])
+					result.DisplayName = name
+
 					results = append(results, result)
 				}
 				resp.Results = slices.Values(results)
@@ -124,7 +128,9 @@ func TestServerListResource(t *testing.T) {
 		}
 
 		r.ListMethod = func(ctx context.Context, req list.ListRequest, resp *list.ListResultsStream) {
-			result := req.ToListResult(ctx, resources["plateau"].ThingResourceIdentity, nil, "plateau")
+			result := req.NewListResult()
+			result.Identity.Set(ctx, resources["plateau"].ThingResourceIdentity)
+			result.DisplayName = "plateau"
 
 			resp.Results = slices.Values([]list.ListResult{result})
 		}
@@ -264,6 +270,7 @@ func TestServerListResource(t *testing.T) {
 				{
 					DisplayName: "plateau",
 					Identity:    expectedResourceIdentities["plateau"],
+					Resource:    &tfprotov6.DynamicValue{MsgPack: []uint8{0xc0}},
 					Diagnostics: []*tfprotov6.Diagnostic{
 						{
 							Severity: tfprotov6.DiagnosticSeverityWarning,

list/list_resource.go

@@ -103,6 +103,18 @@ type ListRequest struct {
 	ResourceIdentitySchema fwschema.Schema
 }
 
+func (r ListRequest) NewListResult() ListResult {
+	identity := &tfsdk.ResourceIdentity{Schema: r.ResourceIdentitySchema}
+	resource := &tfsdk.Resource{Schema: r.ResourceSchema}
+
+	return ListResult{
+		DisplayName: "",
+		Resource:    resource,
+		Identity:    identity,
+		Diagnostics: diag.Diagnostics{},
+	}
+}
+
 // ListResultsStream represents a streaming response to a [ListRequest].  An
 // instance of this struct is supplied as an argument to the provider's
 // [ListResource.List] function. The provider should set a Results iterator