Move const tests for Result to library\core

Part of #76268

library/core/tests/result.rs

@@ -305,3 +305,19 @@ fn test_result_as_deref_mut() {
     let expected_result = Result::Err::<&mut u32, &mut Vec<i32>>(&mut expected_vec);
     assert_eq!(mut_err.as_deref_mut(), expected_result);
 }
+
+#[test]
+fn result_const() {
+    // test that the methods of `Result` are usable in a const context
+
+    const RESULT: Result<usize, bool> = Ok(32);
+
+    const REF: Result<&usize, &bool> = RESULT.as_ref();
+    assert_eq!(REF, Ok(&32));
+
+    const IS_OK: bool = RESULT.is_ok();
+    assert!(IS_OK);
+
+    const IS_ERR: bool = RESULT.is_err();
+    assert!(!IS_ERR)
+}

src/test/ui/consts/const-result.rs

@@ -1,12 +0,0 @@
-// run-pass
-
-fn main() {
-    const X: Result<i32, bool> = Ok(32);
-    const Y: Result<&i32, &bool> = X.as_ref();
-
-    const IS_OK: bool = X.is_ok();
-    assert!(IS_OK);
-
-    const IS_ERR: bool = Y.is_err();
-    assert!(!IS_ERR)
-}