fix(writer): use UTF-8 encoding to support non-ASCII characters

See item 1 here: https://discourse.pollination.cloud/t/ida-ice-export-feedback/3103?u=mostapha

honeybee_idaice/writer.py

@@ -453,7 +453,7 @@ def model_to_idm(
     templates_folder = __here__.joinpath('templates')
 
     # create building file that includes building bodies and a reference to the rooms
-    with bldg_file.open('w') as bldg:
+    with bldg_file.open('w', encoding='UTF-8') as bldg:
         header = ';IDA 4.80002 Data UTF-8\n' \
             f'(DOCUMENT-HEADER :TYPE BUILDING :N "{bldg_name}" :MS 4 :CK ((RECENT (WINDEF . "Double Clear Air (WIN7)"))) :PARENT ICE :APP (ICE :VER 4.802))\n'
         bldg.write(header)

tests/writer_test.py

@@ -10,3 +10,15 @@ def test_model():
     model = Model.from_hbjson(in_file)
     outf = model_to_idm(model, out_folder.as_posix(), name='revit_sample_model')
     assert outf.exists()
+
+
+def test_non_ascii():
+    in_file = './tests/assets/single-room.hbjson'
+    out_folder = pathlib.Path('./tests/assets/temp')
+    out_folder.mkdir(parents=True, exist_ok=True)
+    model = Model.from_hbjson(in_file)
+    outf = model_to_idm(model, out_folder.as_posix(), name='single-room', debug=True)
+    assert outf.is_file()
+    bldg_file = out_folder.joinpath('single-room', 'single-room.idm')
+    content = bldg_file.read_text(encoding='UTF-8')
+    assert 'CE-ZONE :N "Wände" :T ZONE' in content