fix: add quotes to field name validation to avoid ambiguity

dev/src/serializer.ts

@@ -308,7 +308,7 @@ export function validateUserInput(
   level = level || 0;
   inArray = inArray || false;
 
-  const fieldPathMessage = path ? ` (found in field ${path})` : '';
+  const fieldPathMessage = path ? ` (found in field "${path}")` : '';
 
   if (Array.isArray(value)) {
     for (let i = 0; i < value.length; ++i) {

dev/src/validate.ts

@@ -67,7 +67,7 @@ export function customObjectMessage(
   value: unknown,
   path?: FieldPath
 ): string {
-  const fieldPathMessage = path ? ` (found in field ${path})` : '';
+  const fieldPathMessage = path ? ` (found in field "${path}")` : '';
 
   if (isObject(value)) {
     // We use the base class name as the type name as the sentinel classes

dev/test/document.ts

@@ -140,22 +140,22 @@ describe('serialize document', () => {
     expect(() => {
       firestore.doc('collectionId/documentId').set({foo: undefined});
     }).to.throw(
-      'Value for argument "data" is not a valid Firestore document. Cannot use "undefined" as a Firestore value (found in field foo).'
+      'Value for argument "data" is not a valid Firestore document. Cannot use "undefined" as a Firestore value (found in field "foo").'
     );
 
     expect(() => {
       firestore.doc('collectionId/documentId').set({
         foo: FieldPath.documentId(),
       });
     }).to.throw(
-      'Value for argument "data" is not a valid Firestore document. Cannot use object of type "FieldPath" as a Firestore value (found in field foo).'
+      'Value for argument "data" is not a valid Firestore document. Cannot use object of type "FieldPath" as a Firestore value (found in field "foo").'
     );
 
     expect(() => {
       class Foo {}
       firestore.doc('collectionId/documentId').set({foo: new Foo()});
     }).to.throw(
-      'Value for argument "data" is not a valid Firestore document. Couldn\'t serialize object of type "Foo" (found in field foo). Firestore doesn\'t support JavaScript objects with custom prototypes (i.e. objects that were created via the "new" operator).'
+      'Value for argument "data" is not a valid Firestore document. Couldn\'t serialize object of type "Foo" (found in field "foo"). Firestore doesn\'t support JavaScript objects with custom prototypes (i.e. objects that were created via the "new" operator).'
     );
 
     expect(() => {
@@ -1238,7 +1238,7 @@ describe('set document', () => {
     expect(() => {
       firestore.doc('collectionId/documentId').set({foo: FieldValue.delete()});
     }).to.throw(
-      'Value for argument "data" is not a valid Firestore document. FieldValue.delete() must appear at the top-level and can only be used in update() or set() with {merge:true} (found in field foo).'
+      'Value for argument "data" is not a valid Firestore document. FieldValue.delete() must appear at the top-level and can only be used in update() or set() with {merge:true} (found in field "foo").'
     );
   });
 
@@ -1587,15 +1587,15 @@ describe('update document', () => {
         a: {b: FieldValue.delete()},
       });
     }).to.throw(
-      'Update() requires either a single JavaScript object or an alternating list of field/value pairs that can be followed by an optional precondition. Value for argument "dataOrField" is not a valid Firestore value. FieldValue.delete() must appear at the top-level and can only be used in update() or set() with {merge:true} (found in field a.b).'
+      'Update() requires either a single JavaScript object or an alternating list of field/value pairs that can be followed by an optional precondition. Value for argument "dataOrField" is not a valid Firestore value. FieldValue.delete() must appear at the top-level and can only be used in update() or set() with {merge:true} (found in field "a.b").'
     );
 
     expect(() => {
       firestore.doc('collectionId/documentId').update('a', {
         b: FieldValue.delete(),
       });
     }).to.throw(
-      'Update() requires either a single JavaScript object or an alternating list of field/value pairs that can be followed by an optional precondition. Element at index 1 is not a valid Firestore value. FieldValue.delete() must appear at the top-level and can only be used in update() or set() with {merge:true} (found in field a.b).'
+      'Update() requires either a single JavaScript object or an alternating list of field/value pairs that can be followed by an optional precondition. Element at index 1 is not a valid Firestore value. FieldValue.delete() must appear at the top-level and can only be used in update() or set() with {merge:true} (found in field "a.b").'
     );
 
     expect(() => {