add additional testcase with PartialEq present

Author: Jacherr

tests/ui/unnecessary_map_or.fixed

@@ -50,6 +50,11 @@ fn main() {
     struct S;
     let r: Result<i32, S> = Ok(3);
     let _ = r.is_ok_and(|x| x == 7);
+
+    #[derive(PartialEq)]
+    struct S2;
+    let r: Result<i32, S2> = Ok(4);
+    let _ = (r == Ok(8));
 }
 
 #[clippy::msrv = "1.69.0"]

tests/ui/unnecessary_map_or.rs

@@ -53,6 +53,11 @@ fn main() {
     struct S;
     let r: Result<i32, S> = Ok(3);
     let _ = r.map_or(false, |x| x == 7);
+
+    #[derive(PartialEq)]
+    struct S2;
+    let r: Result<i32, S2> = Ok(4);
+    let _ = r.map_or(false, |x| x == 8);
 }
 
 #[clippy::msrv = "1.69.0"]

tests/ui/unnecessary_map_or.stderr

@@ -89,5 +89,11 @@ error: this `map_or` is redundant
 LL |     let _ = r.map_or(false, |x| x == 7);
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use is_ok_and instead: `r.is_ok_and(|x| x == 7)`
 
-error: aborting due to 12 previous errors
+error: this `map_or` is redundant
+  --> tests/ui/unnecessary_map_or.rs:60:13
+   |
+LL |     let _ = r.map_or(false, |x| x == 8);
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use a standard comparison instead: `(r == Ok(8))`
+
+error: aborting due to 13 previous errors