Elevate access level to support mocking

google-cloud-clients/google-cloud-firestore/src/main/java/com/google/cloud/firestore/DocumentReference.java

@@ -46,7 +46,8 @@ public class DocumentReference {
   private final ResourcePath path;
   private final FirestoreImpl firestore;
 
-  DocumentReference(FirestoreImpl firestore, ResourcePath path) {
+  protected DocumentReference(
+      FirestoreImpl firestore, ResourcePath path) { // Elevated access level for mocking.
     this.path = path;
     this.firestore = firestore;
   }

google-cloud-clients/google-cloud-firestore/src/main/java/com/google/cloud/firestore/DocumentSnapshot.java

@@ -53,13 +53,13 @@ public class DocumentSnapshot {
   @Nullable private final Timestamp updateTime;
   @Nullable private final Timestamp createTime;
 
-  DocumentSnapshot(
+  protected DocumentSnapshot(
       FirestoreImpl firestore,
       DocumentReference docRef,
       @Nullable Map<String, Value> fields,
       @Nullable Timestamp readTime,
       @Nullable Timestamp updateTime,
-      @Nullable Timestamp createTime) {
+      @Nullable Timestamp createTime) { // Elevated access level for mocking.
     this.firestore = firestore;
     this.docRef = docRef;
     this.fields = fields;

google-cloud-clients/google-cloud-firestore/src/main/java/com/google/cloud/firestore/Query.java

@@ -254,7 +254,10 @@ public int hashCode() {
     this(firestore, path, new QueryOptions());
   }
 
-  private Query(FirestoreImpl firestore, ResourcePath path, QueryOptions queryOptions) {
+  protected Query(
+      FirestoreImpl firestore,
+      ResourcePath path,
+      QueryOptions queryOptions) { // Elevated access level for mocking.
     Preconditions.checkArgument(
         path.isCollection(), "Invalid path specified. Path should point to a collection");
 

google-cloud-clients/google-cloud-firestore/src/main/java/com/google/cloud/firestore/QueryDocumentSnapshot.java

@@ -37,13 +37,13 @@
  * that does so.
  */
 public class QueryDocumentSnapshot extends DocumentSnapshot {
-  private QueryDocumentSnapshot(
+  protected QueryDocumentSnapshot(
       FirestoreImpl firestore,
       DocumentReference docRef,
       Map<String, Value> fields,
       Timestamp readTime,
       Timestamp updateTime,
-      Timestamp createTime) {
+      Timestamp createTime) { // Elevated access level for mocking.
     super(firestore, docRef, fields, readTime, updateTime, createTime);
   }
 

google-cloud-clients/google-cloud-firestore/src/main/java/com/google/cloud/firestore/QuerySnapshot.java

@@ -34,7 +34,7 @@ public abstract class QuerySnapshot implements Iterable<QueryDocumentSnapshot> {
   private final Query query;
   private final Timestamp readTime;
 
-  private QuerySnapshot(Query query, Timestamp readTime) {
+  protected QuerySnapshot(Query query, Timestamp readTime) { // Elevated access level for mocking.
     this.query = query;
     this.readTime = readTime;
   }