small refactor

tests/test_info.py

@@ -23,15 +23,22 @@ def foobar():
     self.foo(self.baz(1), 2)
 """
     ast.build_ast(src)
+    analyzer = AstAnalyzer(ast)
 
     doc = Document(uri="<inline source code>", source=src)
 
+    pos = Position(line=3, character=11)
+    params = SignatureHelpParams(
+        text_document=TextDocumentIdentifier(doc.uri), position=pos
+    )
+    sig_help = analyzer.signature_help(doc, params)
+    assert sig_help is None
+
     pos = Position(line=7, character=13)
     params = SignatureHelpParams(
         text_document=TextDocumentIdentifier(doc.uri), position=pos
     )
 
-    analyzer = AstAnalyzer(ast)
     sig_help = analyzer.signature_help(doc, params)
     assert sig_help
     assert sig_help.active_signature == 0

vyper_lsp/analyzer/AstAnalyzer.py

@@ -58,7 +58,7 @@ def __init__(self, ast: AST) -> None:
             self.diagnostics_enabled = True
 
     def _handle_internal_fn_signature(
-        self, doc: Document, current_line: str, fn_name: str
+        self, current_line: str, fn_name: str
     ) -> Optional[SignatureHelp]:
         node = self.ast.find_function_declaration_node_for_name(fn_name)
         if not node:
@@ -109,7 +109,7 @@ def signature_help(
 
         # this returns for all external functions
         if module == "self":
-            return self._handle_internal_fn_signature(doc, current_line, fn_name)
+            return self._handle_internal_fn_signature(current_line, fn_name)
 
     def _dot_completions_for_element(
         self, element: str, top_level_node=None, line: str = ""