Add test for prepareLocal

Contributes to issue CURA-5929.

plugins/LegacyProfileReader/tests/TestLegacyProfileReader.py

@@ -1,9 +1,10 @@
 # Copyright (c) 2018 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
-import pytest #To register tests with.
+import configparser # An input for some functions we're testing.
+import pytest # To register tests with.
 
-from LegacyProfileReader import LegacyProfileReader #The module we're testing.
+from LegacyProfileReader import LegacyProfileReader # The module we're testing.
 
 @pytest.fixture
 def legacy_profile_reader():
@@ -11,7 +12,8 @@ def legacy_profile_reader():
 
 test_prepareDefaultsData = [
     {
-        "defaults": {
+        "defaults":
+        {
             "foo": "bar"
         },
         "cheese": "delicious"
@@ -28,4 +30,37 @@ def test_prepareDefaults(legacy_profile_reader, input):
     if "defaults" in input:
         assert input["defaults"] == output
     else:
-        assert output == {}
+        assert output == {}
+
+test_prepareLocalsData = [
+    (
+        { # Parser data.
+            "profile":
+            {
+                "layer_height": "0.2",
+                "infill_density": "30"
+            }
+        },
+        "profile", # Config section.
+        { # Defaults.
+            "layer_height": "0.1",
+            "infill_density": "20",
+            "line_width": "0.4"
+        }
+    )
+]
+
+@pytest.mark.parametrize("parser_data, config_section, defaults", test_prepareLocalsData)
+def test_prepareLocals(legacy_profile_reader, parser_data, config_section, defaults):
+    parser = configparser.ConfigParser()
+    parser.read_dict(parser_data)
+
+    output = legacy_profile_reader.prepareLocals(parser, config_section, defaults)
+
+    assert set(defaults.keys()) <= set(output.keys()) # All defaults must be in there.
+    assert set(parser_data[config_section]) <= set(output.keys()) # All overwritten values must be in there.
+    for key in output:
+        if key in parser_data[config_section]:
+            assert output[key] == parser_data[config_section][key] # If overwritten, must be the overwritten value.
+        else:
+            assert output[key] == defaults[key] # Otherwise must be equal to the default.