Added tests.

gui/src/components/units/Quantity.spec.js

@@ -39,7 +39,8 @@ test('conversion works both ways for each compatible unit', async () => {
   }
 })
 
-test.each([
+test.only.each([
+  ['dimensionless', 'dimensionless', 1],
   ['percent', 'percent', 100],
   ['ppm', 'ppm', 1000000]
 ]

nomad/cli/dev.py

@@ -516,6 +516,7 @@ def _generate_units_json(all_metainfo) -> Tuple[Any, Any]:
                 'label': 'Kilogram',
                 'abbreviation': 'kg',
             },
+            # TODO: Could the dimensionless quantities be added programmatically?
             # Dimensionless
             {
                 'name': 'dimensionless',