unnecessary_clone: split rustfixable lint out into separate test

Author: Manishearth

tests/ui/iter_cloned_collect.fixed

@@ -0,0 +1,22 @@
+// run-rustfix
+
+#![allow(unused)]
+
+use std::collections::HashSet;
+use std::collections::VecDeque;
+
+fn main() {
+    let v = [1, 2, 3, 4, 5];
+    let v2: Vec<isize> = v.to_vec();
+    let v3: HashSet<isize> = v.iter().cloned().collect();
+    let v4: VecDeque<isize> = v.iter().cloned().collect();
+
+    // Handle macro expansion in suggestion
+    let _: Vec<isize> = vec![1, 2, 3].to_vec();
+
+    // Issue #3704
+    unsafe {
+        let _: Vec<u8> = std::ffi::CStr::from_ptr(std::ptr::null())
+            .to_bytes().to_vec();
+    }
+}

tests/ui/iter_cloned_collect.rs

@@ -0,0 +1,25 @@
+// run-rustfix
+
+#![allow(unused)]
+
+use std::collections::HashSet;
+use std::collections::VecDeque;
+
+fn main() {
+    let v = [1, 2, 3, 4, 5];
+    let v2: Vec<isize> = v.iter().cloned().collect();
+    let v3: HashSet<isize> = v.iter().cloned().collect();
+    let v4: VecDeque<isize> = v.iter().cloned().collect();
+
+    // Handle macro expansion in suggestion
+    let _: Vec<isize> = vec![1, 2, 3].iter().cloned().collect();
+
+    // Issue #3704
+    unsafe {
+        let _: Vec<u8> = std::ffi::CStr::from_ptr(std::ptr::null())
+            .to_bytes()
+            .iter()
+            .cloned()
+            .collect();
+    }
+}

tests/ui/iter_cloned_collect.stderr

@@ -0,0 +1,26 @@
+error: called `iter().cloned().collect()` on a slice to create a `Vec`. Calling `to_vec()` is both faster and more readable
+  --> $DIR/iter_cloned_collect.rs:10:27
+   |
+LL |     let v2: Vec<isize> = v.iter().cloned().collect();
+   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.to_vec()`
+   |
+   = note: `-D clippy::iter-cloned-collect` implied by `-D warnings`
+
+error: called `iter().cloned().collect()` on a slice to create a `Vec`. Calling `to_vec()` is both faster and more readable
+  --> $DIR/iter_cloned_collect.rs:15:38
+   |
+LL |     let _: Vec<isize> = vec![1, 2, 3].iter().cloned().collect();
+   |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.to_vec()`
+
+error: called `iter().cloned().collect()` on a slice to create a `Vec`. Calling `to_vec()` is both faster and more readable
+  --> $DIR/iter_cloned_collect.rs:20:24
+   |
+LL |               .to_bytes()
+   |  ________________________^
+LL | |             .iter()
+LL | |             .cloned()
+LL | |             .collect();
+   | |______________________^ help: try: `.to_vec()`
+
+error: aborting due to 3 previous errors
+

tests/ui/unnecessary_clone.rs

@@ -1,9 +1,9 @@
+// does not test any rustfixable lints
+
 #![warn(clippy::clone_on_ref_ptr)]
 #![allow(unused)]
 
 use std::cell::RefCell;
-use std::collections::HashSet;
-use std::collections::VecDeque;
 use std::rc::{self, Rc};
 use std::sync::{self, Arc};
 
@@ -66,25 +66,6 @@ fn clone_on_double_ref() {
     println!("{:p} {:p}", *y, z);
 }
 
-fn iter_clone_collect() {
-    let v = [1, 2, 3, 4, 5];
-    let v2: Vec<isize> = v.iter().cloned().collect();
-    let v3: HashSet<isize> = v.iter().cloned().collect();
-    let v4: VecDeque<isize> = v.iter().cloned().collect();
-
-    // Handle macro expansion in suggestion
-    let _: Vec<isize> = vec![1, 2, 3].iter().cloned().collect();
-
-    // Issue #3704
-    unsafe {
-        let _: Vec<u8> = std::ffi::CStr::from_ptr(std::ptr::null())
-            .to_bytes()
-            .iter()
-            .cloned()
-            .collect();
-    }
-}
-
 mod many_derefs {
     struct A;
     struct B;

tests/ui/unnecessary_clone.stderr

@@ -78,35 +78,11 @@ help: or try being explicit about what type to clone
 LL |     let z: &Vec<_> = &std::vec::Vec<i32>::clone(y);
    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error: called `iter().cloned().collect()` on a slice to create a `Vec`. Calling `to_vec()` is both faster and more readable
-  --> $DIR/unnecessary_clone.rs:71:27
-   |
-LL |     let v2: Vec<isize> = v.iter().cloned().collect();
-   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.to_vec()`
-   |
-   = note: `-D clippy::iter-cloned-collect` implied by `-D warnings`
-
-error: called `iter().cloned().collect()` on a slice to create a `Vec`. Calling `to_vec()` is both faster and more readable
-  --> $DIR/unnecessary_clone.rs:76:38
-   |
-LL |     let _: Vec<isize> = vec![1, 2, 3].iter().cloned().collect();
-   |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.to_vec()`
-
-error: called `iter().cloned().collect()` on a slice to create a `Vec`. Calling `to_vec()` is both faster and more readable
-  --> $DIR/unnecessary_clone.rs:81:24
-   |
-LL |               .to_bytes()
-   |  ________________________^
-LL | |             .iter()
-LL | |             .cloned()
-LL | |             .collect();
-   | |______________________^ help: try: `.to_vec()`
-
 error: using `clone` on a `Copy` type
-  --> $DIR/unnecessary_clone.rs:119:20
+  --> $DIR/unnecessary_clone.rs:100:20
    |
 LL |         let _: E = a.clone();
    |                    ^^^^^^^^^ help: try dereferencing it: `*****a`
 
-error: aborting due to 15 previous errors
+error: aborting due to 12 previous errors