tests: fix backup tests (#1154)

tests: wait for the backup to complete before finishing it
tests: only trigger internal backup (from main to temp tables) when version is larger or equal to 3.26

test/backup.test.js

@@ -151,14 +151,15 @@ describe('backup', function() {
         });
     });
 
-    (sqlite3.VERSION_NUMBER < 3007011 ? it.skip : it) ('can backup from temp to main', function(done) {
+    (sqlite3.VERSION_NUMBER < 3026000 ? it.skip : it) ('can backup from temp to main', function(done) {
         db.exec("CREATE TEMP TABLE space (txt TEXT)", function(err) {
             if (err) throw err;
             db.exec("INSERT INTO space(txt) VALUES('monkey')", function(err) {
                 if (err) throw err;
                 var backup = db.backup('test/tmp/backup.db', 'temp', 'main', true, function(err) {
                     if (err) throw err;
-                    backup.step(-1);
+                    backup.step(-1, function(err) {
+                        if (err) throw err;
                         backup.finish(function(err) {
                             if (err) throw err;
                             var db2 = new sqlite3.Database('test/tmp/backup.db', function(err) {
@@ -174,17 +175,20 @@ describe('backup', function() {
                 });
             });
         });
+    });
 
-    (sqlite3.VERSION_NUMBER < 3007011 ? it.skip : it) ('can backup from main to temp', function(done) {
+    (sqlite3.VERSION_NUMBER < 3026000 ? it.skip : it) ('can backup from main to temp', function(done) {
         var backup = db.backup('test/support/prepare.db', 'main', 'temp', false, function(err) {
             if (err) throw err;
-            backup.step(-1);
+            backup.step(-1, function(err) {
+                if (err) throw err;
                 backup.finish(function(err) {
                     if (err) throw err;
                     assertRowsMatchDb(db, 'temp.foo', db, 'main.foo', done);
                 });
             });
         });
+    });
 
     it ('cannot backup to a locked db', function(done) {
         var db2 = new sqlite3.Database('test/tmp/backup.db', function(err) {