[FIX] color serialization

Author: ilaif

src/structurizr/view/element_style.py

@@ -19,11 +19,11 @@
 from typing import Optional
 
 from pydantic import Field
-from .color import Color
 
 from ..abstract_base import AbstractBase
 from ..base_model import BaseModel
 from .border import Border
+from .color import Color
 from .shape import Shape
 
 

src/structurizr/view/relationship_style.py

@@ -19,10 +19,10 @@
 from typing import Optional
 
 from pydantic import Field
-from .color import Color
 
 from ..abstract_base import AbstractBase
 from ..base_model import BaseModel
+from .color import Color
 from .routing import Routing
 
 

tests/test_unit/view/test_color.py

@@ -0,0 +1,49 @@
+# Copyright (c) 2020, Moritz E. Beber.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+"""Ensure the expected behaviour of the code element."""
+
+
+import pydantic
+import pytest
+
+from structurizr.view.color import Color
+
+
+@pytest.mark.parametrize(
+    "color",
+    [
+        {"value": "#ffffff", "expected": "#ffffff"},
+        {"value": "#fff", "expected": "#ffffff"},
+        {"value": "#f0f0f0", "expected": "#f0f0f0"},
+        {"value": "#000", "expected": "#000000"},
+        {"value": "#000000", "expected": "#000000"},
+        {"value": "green", "expected": "#008000"},
+        {"value": "white", "expected": "#ffffff"},
+        pytest.param(
+            {"value": "never-gonna-let-you-down", "expected": None},
+            marks=pytest.mark.raises(
+                exception=pydantic.errors.ColorError,
+                message=(
+                    "value is not a valid color: string not "
+                    "recognised as a valid color"
+                ),
+            ),
+        ),
+    ],
+)
+def test_code_element_init(color):
+    """Expect proper initialization from arguments."""
+    assert str(Color(color["value"])) == color["expected"]