Merge branch 'jw/start-after' into jw/end-before

Author: jmwski

firebase-database/CHANGELOG.md

@@ -4,6 +4,7 @@
 - [added] Added `Query.get()`, which allows users to receive a single data
   snapshot. `Query.get()` returns the latest value even if an older value
   already exists in cache.
+- [added] Added `Query.startAfter()` filter for paginating RTDB queries.
 
 # 19.5.1
 - [fixed] Fixes a regression in v19.4 that may cause assertion failures,

firebase-database/src/test/java/com/google/firebase/database/PushIdGeneratorTest.java

@@ -37,25 +37,25 @@ public class PushIdGeneratorTest {
   @Test
   public void testSuccessorSpecialValue() {
     assertEquals(
-        PushIdGenerator.successor(String.valueOf(Integer.MAX_VALUE)),
-        Character.toString(MIN_PUSH_CHAR));
+        Character.toString(MIN_PUSH_CHAR),
+        PushIdGenerator.successor(String.valueOf(Integer.MAX_VALUE)));
     assertEquals(
+        MAX_KEY_NAME,
         PushIdGenerator.successor(
-            StringUtils.repeat(Character.toString(MAX_PUSH_CHAR), MAX_KEY_LEN)),
-        MAX_KEY_NAME);
+            StringUtils.repeat(Character.toString(MAX_PUSH_CHAR), MAX_KEY_LEN)));
   }
 
   @Test
   public void testSuccessorBasic() {
-    assertEquals(PushIdGenerator.successor("abc"), "abc" + MIN_PUSH_CHAR);
+    assertEquals("abc" + MIN_PUSH_CHAR, PushIdGenerator.successor("abc"));
     assertEquals(
+        "abd",
         PushIdGenerator.successor(
             "abc"
                 + StringUtils.repeat(
-                    Character.toString(MAX_PUSH_CHAR), MAX_KEY_LEN - "abc".length())),
-        "abd");
+                    Character.toString(MAX_PUSH_CHAR), MAX_KEY_LEN - "abc".length())));
     assertEquals(
-        PushIdGenerator.successor("abc" + MIN_PUSH_CHAR), "abc" + MIN_PUSH_CHAR + MIN_PUSH_CHAR);
+        "abc" + MIN_PUSH_CHAR + MIN_PUSH_CHAR, PushIdGenerator.successor("abc" + MIN_PUSH_CHAR));
   }
 
   @Test