fix(method-snippets): fix expanding method snippets in some edge-cases

Author: zardoy

typescript/src/completions/functionCompletions.ts

@@ -7,7 +7,8 @@ export default (entries: ts.CompletionEntry[]) => {
     const { languageService, c, sourceFile, position } = sharedCompletionContext
 
     const methodSnippetInsertTextMode = c('methodSnippetsInsertText')
-    const enableResolvingInsertText = c('enableMethodSnippets') && methodSnippetInsertTextMode !== 'disable'
+    const nextChar = sourceFile.getFullText().slice(position, position + 1)
+    const enableResolvingInsertText = !['(', '.', '`'].includes(nextChar) && c('enableMethodSnippets') && methodSnippetInsertTextMode !== 'disable'
     const changeKindToFunction = c('experiments.changeKindToFunction')
 
     if (!enableResolvingInsertText && !changeKindToFunction) return

typescript/src/constructMethodSnippet.ts

@@ -19,7 +19,9 @@ export default (
     if (!containerNode || isTypeNode(containerNode)) return
 
     const checker = languageService.getProgram()!.getTypeChecker()!
-    const type = symbol ? checker.getTypeOfSymbol(symbol) : checker.getTypeAtLocation(containerNode)
+    let type = symbol ? checker.getTypeOfSymbol(symbol) : checker.getTypeAtLocation(containerNode)
+    // give another chance
+    if (symbol && type['intrinsicName'] === 'error') type = checker.getTypeOfSymbolAtLocation(symbol, containerNode)
 
     if (ts.isIdentifier(containerNode)) containerNode = containerNode.parent
     if (ts.isPropertyAccessExpression(containerNode)) containerNode = containerNode.parent