Add tests for queries

- [ ] **build.py** - current: 42%
- [ ] **checkout.py** - current: 31%
- [ ] **hardware.py** - current: 21%
- [ ] **issues.py** - current: 18%
- [ ] **notifications.py** - current: 17%
- [ ] **test.py** - current: 30%
- [ ] **tree.py** - current: 19%
