added tests for all formatters; stylecheck workflow now also checks in tests now

html_to_django/formatters/style_formatter.py

@@ -21,12 +21,18 @@ def parse_style(style: str) -> dict[str, str]:
 
 
 def style_to_string(style: dict[str, str]) -> str:
-    return ";".join([f"{name}:{value}" for name, value in style.items()])
+    result = ";".join([f"{name}:{value}" for name, value in style.items()])
+    if len(style) != 0:
+        result += ";"
+    return result
 
 
 def format(soup: BeautifulSoup) -> None:
     for element in soup.find_all(attrs={"dj-style": True}):
-        style = parse_style(element["style"])
+        if element.has_attr("style"):
+            style = parse_style(element["style"])
+        else:
+            style = {}
         dj_style = element.get("dj-style")
         for name, value, value_type in [declaration.split(";") for declaration in dj_style.split("~") if declaration]:
             style[name] = f"{{{{ {value} }}}}{value_type}"