small cleanup

Author: Brian Chen

packages/firestore/src/api/database.ts

@@ -1458,7 +1458,7 @@ export function newQueryFilter(
       dataReader,
       methodName,
       value,
-      op === Operator.IN || op === Operator.NOT_IN
+      /* allowArrays= */ op === Operator.IN || op === Operator.NOT_IN
     );
   }
   const filter = FieldFilter.create(fieldPath, op, fieldValue);

packages/firestore/test/unit/core/query.test.ts

@@ -239,6 +239,18 @@ describe('Query', () => {
     });
     expect(queryMatches(query1, document)).to.be.true;
 
+    // Null match.
+    document = doc('collection/1', 0, {
+      zip: null
+    });
+    expect(queryMatches(query1, document)).to.be.true;
+
+    // NaN match.
+    document = doc('collection/1', 0, {
+      zip: Number.NaN
+    });
+    expect(queryMatches(query1, document)).to.be.true;
+
     // Direct match.
     document = doc('collection/1', 0, { zip: 12345 });
     expect(queryMatches(query1, document)).to.be.false;