DOP-1166: add validation for icon role (#414)

* add validation check for icon role

* initialize icon set once in separate module

* remove logs

* move const file for import. add font awesome prefixes for set intersection

* run make format

* remove unused import. fix failing test

* convert to python module to export icon set

* fix formatting

* address comments. use f string, update possible icon set list, update error message

* minor. update var name

Co-authored-by: Seung Park <[email protected]>

Author: seungpark

.gitignore

@@ -10,4 +10,4 @@ htmlcov/
 .venv/
 dist/
 .docs
-.vscode
+.vscode

snooty/diagnostics.py

@@ -696,3 +696,19 @@ def __init__(
             start,
             end,
         )
+
+
+class IconMustBeDefined(Diagnostic):
+    severity = Diagnostic.Level.error
+
+    def __init__(
+        self,
+        icon_role: str,
+        start: Union[int, Tuple[int, int]],
+        end: Union[None, int, Tuple[int, int]] = None,
+    ) -> None:
+        super().__init__(
+            f"The Icon {icon_role} does not exist",
+            start,
+            end,
+        )