Match specific error message in test

Author: vezeli

tests/test_wind_turbine.py

@@ -99,11 +99,12 @@ def test_wrongly_defined_to_group_method(self):
             e_t_1.to_group(5, 3000)
 
     def test_create_unphysical_turbine(self):
+        err_msg = "1/2rotor_diameter cannot be greater than hub_height"
         char = {
            'hub_height': 80,
            'rotor_diameter': 160,
            'turbine_type': 'DUMMY 3',
            'path': self.source
         }
-        with pytest.raises(ValueError):
+        with pytest.raises(ValueError, match=err_msg):
             WindTurbine(**char)

windpowerlib/wind_turbine.py

@@ -165,7 +165,7 @@ def __init__(self, hub_height, nominal_power=None, path='oedb',
 
         if self.rotor_diameter:
             if self.hub_height <= 0.5*self.rotor_diameter:
-                msg = "1/2*rotor_diameter cannot be higher than hub_height"
+                msg = "1/2rotor_diameter cannot be greater than hub_height"
                 raise ValueError(msg)
 
         if self.power_curve is None and self.power_coefficient_curve is None: