Fix issue #368 and add tests (#369)

tests/components/single_file.py

@@ -0,0 +1,26 @@
+from typing import Any, Dict
+
+from django.http import HttpResponse
+
+from django_components import component
+
+
+@component.register("single_file_component")
+class SingleFileComponent(component.Component):
+    template = """
+        <form method="post">
+            {% csrf_token %}
+            <input type="text" name="variable" value="{{ variable }}">
+            <input type="submit">
+        </form>
+        """
+
+    def post(self, request, *args, **kwargs) -> HttpResponse:
+        variable = request.POST.get("variable")
+        return self.render_to_response({"variable": variable})
+
+    def get(self, request, *args, **kwargs) -> HttpResponse:
+        return self.render_to_response({"variable": "GET"})
+
+    def get_context_data(self, variable, *args, **kwargs) -> Dict[str, Any]:
+        return {"variable": variable}