Add Path and PathBuf tests

Author: camsteffen

src/tools/clippy/tests/ui/explicit_counter_loop.rs

@@ -1,5 +1,7 @@
 #![warn(clippy::explicit_counter_loop)]
 
+use std::path::{Path, PathBuf};
+
 fn main() {
     let mut vec = vec![1, 2, 3, 4];
     let mut _index = 0;
@@ -22,6 +24,18 @@ fn main() {
     for _v in vec {
         _index += 1;
     }
+
+    let path = Path::new("");
+    let mut _index = 0;
+    for _v in path.iter() {
+        _index += 1
+    }
+
+    let pathbuf = PathBuf::new();
+    let mut _index = 0;
+    for _v in pathbuf.iter() {
+        _index += 1;
+    }
 }
 
 mod issue_1219 {

src/tools/clippy/tests/ui/explicit_counter_loop.stderr

@@ -1,46 +1,58 @@
 error: the variable `_index` is used as a loop counter.
-  --> $DIR/explicit_counter_loop.rs:6:5
+  --> $DIR/explicit_counter_loop.rs:8:5
    |
 LL |     for _v in &vec {
    |     ^^^^^^^^^^^^^^ help: consider using: `for (_index, _v) in vec.iter().enumerate()`
    |
    = note: `-D clippy::explicit-counter-loop` implied by `-D warnings`
 
 error: the variable `_index` is used as a loop counter.
-  --> $DIR/explicit_counter_loop.rs:12:5
+  --> $DIR/explicit_counter_loop.rs:14:5
    |
 LL |     for _v in &vec {
    |     ^^^^^^^^^^^^^^ help: consider using: `for (_index, _v) in vec.iter().enumerate()`
 
 error: the variable `_index` is used as a loop counter.
-  --> $DIR/explicit_counter_loop.rs:17:5
+  --> $DIR/explicit_counter_loop.rs:19:5
    |
 LL |     for _v in &mut vec {
    |     ^^^^^^^^^^^^^^^^^^ help: consider using: `for (_index, _v) in vec.iter_mut().enumerate()`
 
 error: the variable `_index` is used as a loop counter.
-  --> $DIR/explicit_counter_loop.rs:22:5
+  --> $DIR/explicit_counter_loop.rs:24:5
    |
 LL |     for _v in vec {
    |     ^^^^^^^^^^^^^ help: consider using: `for (_index, _v) in vec.into_iter().enumerate()`
 
+error: the variable `_index` is used as a loop counter.
+  --> $DIR/explicit_counter_loop.rs:30:5
+   |
+LL |     for _v in path.iter() {
+   |     ^^^^^^^^^^^^^^^^^^^^^ help: consider using: `for (_index, _v) in path.iter().enumerate()`
+
+error: the variable `_index` is used as a loop counter.
+  --> $DIR/explicit_counter_loop.rs:36:5
+   |
+LL |     for _v in pathbuf.iter() {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `for (_index, _v) in pathbuf.iter().enumerate()`
+
 error: the variable `count` is used as a loop counter.
-  --> $DIR/explicit_counter_loop.rs:61:9
+  --> $DIR/explicit_counter_loop.rs:75:9
    |
 LL |         for ch in text.chars() {
    |         ^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `for (count, ch) in text.chars().enumerate()`
 
 error: the variable `count` is used as a loop counter.
-  --> $DIR/explicit_counter_loop.rs:72:9
+  --> $DIR/explicit_counter_loop.rs:86:9
    |
 LL |         for ch in text.chars() {
    |         ^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `for (count, ch) in text.chars().enumerate()`
 
 error: the variable `count` is used as a loop counter.
-  --> $DIR/explicit_counter_loop.rs:130:9
+  --> $DIR/explicit_counter_loop.rs:144:9
    |
 LL |         for _i in 3..10 {
    |         ^^^^^^^^^^^^^^^ help: consider using: `for (count, _i) in (3..10).enumerate()`
 
-error: aborting due to 7 previous errors
+error: aborting due to 9 previous errors