modify test

Author: tamaroning

tests/ui/map_then_identity_transformer.rs

@@ -15,6 +15,7 @@ fn main() {
     let _ = a.into_iter().map(|x| foo(x)).filter_map(|y| Some(!y));
     let _ = a.into_iter().map(|x| x + 30).fold(1, |pd, x| pd * x + 1);
     let _ = a.into_iter().map(|x| foo(x)).map(|y| bar(y));
+    let _ = a.into_iter().map(|x| foo(x)).position(|y| bar(y));
 
     // should not lint
     let _ = a.into_iter().map(|x| x > 1).all(|y| foo(0));
@@ -25,6 +26,7 @@ fn main() {
     let _ = a.into_iter().map(|x| foo(x)).filter_map(|y| Some(true));
     let _ = a.into_iter().map(|x| x + 30).fold(1, |pd, x| pd * x * x);
     let _ = a.into_iter().map(|x| foo(x)).map(|y| bar(y) && y);
+    let _ = a.into_iter().map(|x| foo(x)).map(|y| true);
 }
 
 fn foo(a: i32) -> bool {

tests/ui/map_then_identity_transformer.stderr

@@ -93,5 +93,19 @@ LL |     let _ = a.into_iter().map(|x| foo(x)).map(|y| bar(y));
    |                                   |
    |                                   with this expression
 
-error: aborting due to 7 previous errors
+error: this `map` can be collapsed into the `position`
+  --> $DIR/map_then_identity_transformer.rs:18:27
+   |
+LL |     let _ = a.into_iter().map(|x| foo(x)).position(|y| bar(y));
+   |                           ^^^
+   |
+help: these `map` and `position` can be merged into a single `position`
+  --> $DIR/map_then_identity_transformer.rs:18:35
+   |
+LL |     let _ = a.into_iter().map(|x| foo(x)).position(|y| bar(y));
+   |                                   ^^^^^^                   ^ replace this variable
+   |                                   |
+   |                                   with this expression
+
+error: aborting due to 8 previous errors