Test max_categories and min_category_size parameter.

tests/unit/test_parameter.py

+from cml.shared.settings import ConstructionSettings
+from cml.shared.parameter import *
+
+import pytest
+
+
+def test_max_categories_calling():
+    # arrange
+    settings = ConstructionSettings()
+
+    # assert
+    assert settings.max_categories == 2
+
+
+def test_max_categories_raises_type_error():
+    # arrange
+    settings = ConstructionSettings()
+
+    # assert
+    with pytest.raises(TypeError) as e:
+        # act
+        settings.max_categories = list()
+
+    assert str(e.value) == ("Invalid type for max_categories. "
+                            "Tried to redefine max_categories. "
+                            "Make sure that the value is of type int or string.")
+
+
+def test_max_categories_raises_value_error_during_casting():
+    # arrange
+    settings = ConstructionSettings()
+
+    # assert
+    with pytest.raises(ValueError) as e:
+        # act
+        settings.max_categories = "two"
+
+    assert str(e.value) == ("Invalid value for max_categories. "
+                            "Tried to convert string to integer. "
+                            "Make sure that the value is a valid number string.")
+
+
+def test_max_categories_raises_value_error_when_value_is_to_small():
+    # arrange
+    settings = ConstructionSettings()
+
+    # assert
+    with pytest.raises(ValueError) as e:
+        # act
+        settings.max_categories = 1
+
+    assert str(e.value) == ("Invalid value for max_categories. "
+                            "Tried to redefine max_categories. "
+                            "Make sure that the value is greater equal two.")
+
+
+def test_min_category_size_calling():
+    # arrange
+    settings = ConstructionSettings()
+
+    # assert
+    assert settings.min_category_size == 10
+
+
+def test_min_category_size_raises_value_error_when_value_is_to_small():
+    # arrange
+    settings = ConstructionSettings()
+
+    # act
+    with pytest.raises(ValueError) as e:
+        settings.min_category_size = 0
+
+    # assert
+    assert str(e.value) == ("Invalid value for min_category_size. "
+                            "Tried to redefine min_category_size. "
+                            "Make sure that the value is greater equal 1.")
+
+
+def test_min_category_size_raises_value_error_during_converting():
+    # arrange
+    settings = ConstructionSettings()
+
+    # act
+    with pytest.raises(ValueError) as e:
+        settings.min_category_size = "two"
+
+    # assert
+    assert str(e.value) == ("Invalid value for min_category_size. "
+                            "Tried to convert string to integer. "
+                            "Make sure that the value is a valid number string.")
+
+
+def test_min_category_size_raise_type_error():
+    # arrange
+    settings = ConstructionSettings()
+
+    # act
+    with pytest.raises(TypeError) as e:
+        settings.min_category_size = list()
+
+    assert str(e.value) == ("Invalid type for min_category_size. "
+                            "Tried to redefine min_category_size. "
+                            "Make sure that the value is of type int or string.")