Adding a test of the computeSize method

tests/js/compute-size-tests.js

@@ -0,0 +1,54 @@
+////////////////////////////////////////////////////////////////////////////
+//
+// Copyright 2016 Realm Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+////////////////////////////////////////////////////////////////////////////
+
+'use strict';
+
+const Realm = require('realm');
+const TestCase = require('./asserts');
+const schemas = require('./schemas');
+
+module.exports = {
+    testComputeSizeExistsAndIncreases: function() {
+        const realm = new Realm({schema: [
+          { name: 'Something', properties: { numbers: 'int[]' } }
+        ]});
+
+        TestCase.assertEqual(typeof realm.computeSize, 'function');
+
+        const sizeInitially = realm.computeSize();
+        TestCase.assertEqual(typeof sizeInitially, 'number');
+        TestCase.assertTrue(sizeInitially > 0);
+
+        // Compact the Realm first
+        realm.compact();
+
+        const sizeCompacted = realm.computeSize();
+        TestCase.assertEqual(typeof sizeCompacted, 'number');
+        TestCase.assertTrue(sizeCompacted <= sizeInitially);
+        TestCase.assertTrue(sizeCompacted > 0);
+
+        // Add an object
+        realm.write(() => {
+          realm.create('Something', {});
+        });
+
+        const sizeAfter = realm.computeSize();
+        TestCase.assertEqual(typeof sizeAfter, 'number');
+        TestCase.assertTrue(sizeAfter > sizeCompacted);
+    },
+};

tests/js/index.js

@@ -50,6 +50,7 @@ var TESTS = {
     EncryptionTests: require('./encryption-tests'),
     ObjectIDTests: require('./object-id-tests'),
     // Garbagecollectiontests: require('./garbage-collection'),
+    ComputeSizeTests: require('./compute-size-tests'),
 };
 
 // If sync is enabled, run the sync tests