chore: updates outdated test cases prototypes

Signed-off-by: Vincent Biret <vibiret@microsoft.com>

Author: baywet

packages/serialization/json/test/common/testEntity.ts

@@ -144,10 +144,16 @@ export function deserializeBarParser(barResponse: BarResponse | undefined = {}):
 	};
 }
 
-export function serializeTestObject(writer: SerializationWriter, entity: { additionalData?: Record<string, unknown> } | undefined = {}): void {
-	writer.writeAdditionalData(entity.additionalData);
-}
-export function serializeTestParser(writer: SerializationWriter, entity: TestParser | undefined = {}): void {
+export function serializeTestObject(writer: SerializationWriter, entity: { additionalData?: Record<string, unknown> } | undefined | null = {}): void {
+	if (!entity) {
+    return;
+  }
+  writer.writeAdditionalData(entity.additionalData);
+}
+export function serializeTestParser(writer: SerializationWriter, entity: TestParser | undefined | null = {}): void {
+  if (!entity) {
+    return;
+  }
 	writer.writeStringValue("id", entity.id);
 	writer.writeCollectionOfPrimitiveValues("testCollection", entity.testCollection);
 	writer.writeStringValue("testString", entity.testString);
@@ -170,18 +176,27 @@ export function serializeTestParser(writer: SerializationWriter, entity: TestPar
 	writer.writeCollectionOfEnumValues("nextStatuses", entity.nextStatuses);
 }
 
-export function serializeFoo(writer: SerializationWriter, entity: FooResponse | undefined = {}): void {
+export function serializeFoo(writer: SerializationWriter, entity: FooResponse | undefined | null = {}): void {
+  if (!entity) {
+    return;
+  }
 	writer.writeStringValue("id", entity.id);
 	writer.writeCollectionOfObjectValues("bars", entity.bars, serializeBar);
 }
 
-export function serializeBar(writer: SerializationWriter, entity: BarResponse | undefined = {}): void {
+export function serializeBar(writer: SerializationWriter, entity: BarResponse | undefined | null = {}): void {
+  if (!entity) {
+    return;
+  }
 	writer.writeStringValue("propA", entity.propA);
 	writer.writeStringValue("propB", entity.propB);
 	writer.writeDateValue("propC", entity.propC);
 }
 
-export function serializeTestBackModel(writer: SerializationWriter, entity: TestBackedModel | undefined = {}): void {
+export function serializeTestBackModel(writer: SerializationWriter, entity: TestBackedModel | undefined | null = {}): void {
+  if (!entity) {
+    return;
+  }
 	serializeTestParser(writer, entity);
 }
 
@@ -198,7 +213,10 @@ export function deserializeIntoTestUnionObject(fooBar: Partial<TestUnionObject>
 	};
 }
 
-export function serializeTestUnionObject(writer: SerializationWriter, fooBar: Partial<TestUnionObject> | undefined = {}): void {
+export function serializeTestUnionObject(writer: SerializationWriter, fooBar: Partial<TestUnionObject> | undefined | null = {}): void {
+  if (!fooBar) {
+    return;
+  }
 	serializeFoo(writer, fooBar as FooResponse);
 	serializeBar(writer, fooBar as BarResponse);
 }