From d830a6f828e04454873056370679eea28c49365f Mon Sep 17 00:00:00 2001
From: Daniel Sallai <daniel_sallai@epam.com>
Date: Mon, 1 Mar 2021 19:11:07 +0100
Subject: [PATCH] fix: enable autocomplete to use const type

---
 .../material-ui/src/useAutocomplete/useAutocomplete.d.ts  | 2 +-
 .../src/useAutocomplete/useAutocomplete.spec.ts           | 8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/packages/material-ui/src/useAutocomplete/useAutocomplete.d.ts b/packages/material-ui/src/useAutocomplete/useAutocomplete.d.ts
index 693b529f884e40..e4e40085fb34d7 100644
--- a/packages/material-ui/src/useAutocomplete/useAutocomplete.d.ts
+++ b/packages/material-ui/src/useAutocomplete/useAutocomplete.d.ts
@@ -228,7 +228,7 @@ export interface UseAutocompleteProps<
   /**
    * Array of options.
    */
-  options: T[];
+  options: ReadonlyArray<T>;
   /**
    * If `true`, the input's text is selected on focus.
    * It helps the user clear the selected value.
diff --git a/packages/material-ui/src/useAutocomplete/useAutocomplete.spec.ts b/packages/material-ui/src/useAutocomplete/useAutocomplete.spec.ts
index 955335d4974dd2..f31398b6a6fa87 100644
--- a/packages/material-ui/src/useAutocomplete/useAutocomplete.spec.ts
+++ b/packages/material-ui/src/useAutocomplete/useAutocomplete.spec.ts
@@ -104,6 +104,14 @@ function Component() {
     onChange(event, value: Person[]) {},
   });
 
+  // options accepts const and value has correct type
+  useAutocomplete({
+    options: ['1', '2', '3'] as const,
+    onChange(event, value) {
+      expectType<'1' | '2' | '3' | null, typeof value>(value);
+    },
+  });
+
   // Disable clearable
 
   useAutocomplete({