3 files changed, 60 insertions, 13 deletions
diff --git a/tests/ui/starts_ends_with.fixed b/tests/ui/starts_ends_with.fixed
new file mode 100644
index 00000000000..7dfcf9c91e4
--- /dev/null
+++ b/tests/ui/starts_ends_with.fixed
@@ -0,0 +1,46 @@
+// run-rustfix
+#![allow(dead_code, unused_must_use)]
+
+fn main() {}
+
+#[allow(clippy::unnecessary_operation)]
+fn starts_with() {
+    "".starts_with(' ');
+    !"".starts_with(' ');
+}
+
+fn chars_cmp_with_unwrap() {
+    let s = String::from("foo");
+    if s.starts_with('f') {
+        // s.starts_with('f')
+        // Nothing here
+    }
+    if s.ends_with('o') {
+        // s.ends_with('o')
+        // Nothing here
+    }
+    if s.ends_with('o') {
+        // s.ends_with('o')
+        // Nothing here
+    }
+    if !s.starts_with('f') {
+        // !s.starts_with('f')
+        // Nothing here
+    }
+    if !s.ends_with('o') {
+        // !s.ends_with('o')
+        // Nothing here
+    }
+    if !s.ends_with('o') {
+        // !s.ends_with('o')
+        // Nothing here
+    }
+}
+
+#[allow(clippy::unnecessary_operation)]
+fn ends_with() {
+    "".ends_with(' ');
+    !"".ends_with(' ');
+    "".ends_with(' ');
+    !"".ends_with(' ');
+}
diff --git a/tests/ui/starts_ends_with.rs b/tests/ui/starts_ends_with.rs
index a94c8c336df..e48a4246354 100644
--- a/tests/ui/starts_ends_with.rs
+++ b/tests/ui/starts_ends_with.rs
@@ -1,4 +1,5 @@
-#![allow(dead_code)]
+// run-rustfix
+#![allow(dead_code, unused_must_use)]
 
 fn main() {}
 
diff --git a/tests/ui/starts_ends_with.stderr b/tests/ui/starts_ends_with.stderr
index 0f95484da54..7c726d0e010 100644
--- a/tests/ui/starts_ends_with.stderr
+++ b/tests/ui/starts_ends_with.stderr
@@ -1,5 +1,5 @@
 error: you should use the `starts_with` method
-  --> $DIR/starts_ends_with.rs:7:5
+  --> $DIR/starts_ends_with.rs:8:5
    |
 LL |     "".chars().next() == Some(' ');
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `"".starts_with(' ')`
@@ -7,19 +7,19 @@ LL |     "".chars().next() == Some(' ');
    = note: `-D clippy::chars-next-cmp` implied by `-D warnings`
 
 error: you should use the `starts_with` method
-  --> $DIR/starts_ends_with.rs:8:5
+  --> $DIR/starts_ends_with.rs:9:5
    |
 LL |     Some(' ') != "".chars().next();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!"".starts_with(' ')`
 
 error: you should use the `starts_with` method
-  --> $DIR/starts_ends_with.rs:13:8
+  --> $DIR/starts_ends_with.rs:14:8
    |
 LL |     if s.chars().next().unwrap() == 'f' {
    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `s.starts_with('f')`
 
 error: you should use the `ends_with` method
-  --> $DIR/starts_ends_with.rs:17:8
+  --> $DIR/starts_ends_with.rs:18:8
    |
 LL |     if s.chars().next_back().unwrap() == 'o' {
    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `s.ends_with('o')`
@@ -27,49 +27,49 @@ LL |     if s.chars().next_back().unwrap() == 'o' {
    = note: `-D clippy::chars-last-cmp` implied by `-D warnings`
 
 error: you should use the `ends_with` method
-  --> $DIR/starts_ends_with.rs:21:8
+  --> $DIR/starts_ends_with.rs:22:8
    |
 LL |     if s.chars().last().unwrap() == 'o' {
    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `s.ends_with('o')`
 
 error: you should use the `starts_with` method
-  --> $DIR/starts_ends_with.rs:25:8
+  --> $DIR/starts_ends_with.rs:26:8
    |
 LL |     if s.chars().next().unwrap() != 'f' {
    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!s.starts_with('f')`
 
 error: you should use the `ends_with` method
-  --> $DIR/starts_ends_with.rs:29:8
+  --> $DIR/starts_ends_with.rs:30:8
    |
 LL |     if s.chars().next_back().unwrap() != 'o' {
    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!s.ends_with('o')`
 
 error: you should use the `ends_with` method
-  --> $DIR/starts_ends_with.rs:33:8
+  --> $DIR/starts_ends_with.rs:34:8
    |
 LL |     if s.chars().last().unwrap() != 'o' {
    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!s.ends_with('o')`
 
 error: you should use the `ends_with` method
-  --> $DIR/starts_ends_with.rs:41:5
+  --> $DIR/starts_ends_with.rs:42:5
    |
 LL |     "".chars().last() == Some(' ');
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `"".ends_with(' ')`
 
 error: you should use the `ends_with` method
-  --> $DIR/starts_ends_with.rs:42:5
+  --> $DIR/starts_ends_with.rs:43:5
    |
 LL |     Some(' ') != "".chars().last();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!"".ends_with(' ')`
 
 error: you should use the `ends_with` method
-  --> $DIR/starts_ends_with.rs:43:5
+  --> $DIR/starts_ends_with.rs:44:5
    |
 LL |     "".chars().next_back() == Some(' ');
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `"".ends_with(' ')`
 
 error: you should use the `ends_with` method
-  --> $DIR/starts_ends_with.rs:44:5
+  --> $DIR/starts_ends_with.rs:45:5
    |
 LL |     Some(' ') != "".chars().next_back();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!"".ends_with(' ')`