Add test for empty dbs

tests/ExampleTest.php

@@ -3,10 +3,17 @@
 use Illuminate\Support\Str;
 use RonNorthrip\DBPull\Commands\DBPull;
 
-it('can figure out the mysql tables key', function () {
+it('can figure out the mysql tables key for empty db', function () {
+    // $dbname = 'Tables_in_'.Str::snake(config('database.connections.testing.database'));
     $dbpull = new DBPull();
     $method = new ReflectionMethod(DBPull::class, 'local_tables_key');
     $result = $method->invoke($dbpull);
-    $dbname = 'Tables_in_'.Str::snake(config('database.connections.testing.database'));
-    expect($result)->toBe($dbname);
+    expect($result)->toBe(null);
+});
+
+it('can figure out the mysql tables list for empty db', function () {
+    $dbpull = new DBPull();
+    $method = new ReflectionMethod(DBPull::class, 'local_get_tables');
+    $result = $method->invoke($dbpull);
+    expect($result)->toBe([]);
 });