Test series virtual table

src/vtab/series.rs

@@ -242,3 +242,33 @@ impl VTabCursor<SeriesTab> for SeriesTabCursor {
         Ok(self.row_id)
     }
 }
+
+#[cfg(test)]
+mod test {
+    use Connection;
+    use vtab::series;
+    use ffi;
+
+    #[test]
+    fn test_series_module() {
+        let version = unsafe { ffi::sqlite3_libversion_number() };
+        if version < 3008012 {
+            return;
+        }
+
+        let db = Connection::open_in_memory().unwrap();
+        series::load_module(&db).unwrap();
+
+        let mut s = db.prepare("SELECT * FROM generate_series(0,20,5)").unwrap();
+
+
+        let series = s.query_map(&[], |row| row.get(0))
+            .unwrap();
+
+        let mut expected = 0;
+        for value in series {
+            assert_eq!(expected, value.unwrap());
+            expected += 5;
+        }
+    }
+}