Test & document default PRAGMA journal_mode setting

README.md

@@ -66,6 +66,9 @@ Use the `location` or `iosDatabaseLocation` option in `sqlitePlugin.openDatabase
 - R-Tree is *not* tested or supported for Android in this version branch.
 - Android versions supported: 2.3.3 - 7.1.1 (API level 10 - 25), depending on Cordova version ref: <https://cordova.apache.org/docs/en/latest/guide/platforms/android/>
 - iOS versions supported: 8.x / 9.x / 10.x / 11.x
+- Default `PRAGMA journal_mode` setting (*tested*):
+  - Android (builtin android.database implementation): `persist`
+  - otherwise: `delete`
 - In case of memory issues please use smaller transactions or use the version at [litehelpers / Cordova-sqlite-evcore-extbuild-free](https://github.com/litehelpers/Cordova-sqlite-evcore-extbuild-free) (GPL or commercial license terms).
 
 <!-- END Status -->

spec/www/spec/sqlite-version-test.js

@@ -114,6 +114,37 @@ var mytests = function() {
 
       });
 
+      describe(suiteName + 'additional sqlite check(s)', function() {
+
+        it(suiteName + 'Check default PRAGMA journal_mode setting (plugin ONLY)', function(done) {
+          if (isWebSql) pending('SKIP: NOT SUPPORTED for (WebKit) Web SQL');
+
+          var db = openDatabase("Check-sqlite-PRAGMA-encoding.db", "1.0", "Demo", DEFAULT_SIZE);
+
+          expect(db).toBeDefined();
+
+          db.executeSql('PRAGMA journal_mode', [], function(rs) {
+            expect(rs).toBeDefined();
+            expect(rs.rows).toBeDefined();
+            expect(rs.rows.length).toBe(1);
+            // TBD different for builtin android.database implementation:
+            if (!isWindows && isAndroid) // TBD ...
+              expect(rs.rows.item(0).journal_mode).toBe('persist');
+            else
+              expect(rs.rows.item(0).journal_mode).toBe('delete');
+
+            // Close (plugin only) & finish:
+            (isWebSql) ? done() : db.close(done, done);
+          }, function(error) {
+            // NOT EXPECTED:
+            expect(false).toBe(true);
+            expect(error.message).toBe('--');
+            done();
+          });
+        }, MYTIMEOUT);
+
+      });
+
     });
 
   }