Add rustfix test and fix test name.

Author: bravomikekilo

src/test/ui/lint/unused_parens_json_suggestion.fixed

@@ -0,0 +1,27 @@
+// compile-flags: --error-format pretty-json -Zunstable-options
+// build-pass (FIXME(62277): could be check-pass?)
+// run-rustfix
+
+// The output for humans should just highlight the whole span without showing
+// the suggested replacement, but we also want to test that suggested
+// replacement only removes one set of parentheses, rather than naïvely
+// stripping away any starting or ending parenthesis characters—hence this
+// test of the JSON error format.
+
+#![warn(unused_parens)]
+#![allow(unreachable_code)]
+
+fn main() {
+    // We want to suggest the properly-balanced expression `1 / (2 + 3)`, not
+    // the malformed `1 / (2 + 3`
+    let _a = 1 / (2 + 3);
+    f();
+}
+
+fn f() -> bool {
+    loop {
+        if (break { return true }) {
+        }
+    }
+    false
+}

src/test/ui/lint/unused_parens_json_suggestion.rs

@@ -1,5 +1,6 @@
 // compile-flags: --error-format pretty-json -Zunstable-options
 // build-pass (FIXME(62277): could be check-pass?)
+// run-rustfix
 
 // The output for humans should just highlight the whole span without showing
 // the suggested replacement, but we also want to test that suggested
@@ -8,6 +9,7 @@
 // test of the JSON error format.
 
 #![warn(unused_parens)]
+#![allow(unreachable_code)]
 
 fn main() {
     // We want to suggest the properly-balanced expression `1 / (2 + 3)`, not

src/test/ui/lint/unused_parens_json_suggestion.stderr

@@ -8,10 +8,10 @@
   "spans": [
     {
       "file_name": "$DIR/unused_parens_json_suggestion.rs",
-      "byte_start": 611,
-      "byte_end": 624,
-      "line_start": 15,
-      "line_end": 15,
+      "byte_start": 654,
+      "byte_end": 667,
+      "line_start": 17,
+      "line_end": 17,
       "column_start": 14,
       "column_end": 27,
       "is_primary": true,
@@ -36,10 +36,10 @@
       "spans": [
         {
           "file_name": "$DIR/unused_parens_json_suggestion.rs",
-          "byte_start": 457,
-          "byte_end": 470,
-          "line_start": 10,
-          "line_end": 10,
+          "byte_start": 472,
+          "byte_end": 485,
+          "line_start": 11,
+          "line_end": 11,
           "column_start": 9,
           "column_end": 22,
           "is_primary": true,
@@ -66,10 +66,10 @@
       "spans": [
         {
           "file_name": "$DIR/unused_parens_json_suggestion.rs",
-          "byte_start": 611,
-          "byte_end": 624,
-          "line_start": 15,
-          "line_end": 15,
+          "byte_start": 654,
+          "byte_end": 667,
+          "line_start": 17,
+          "line_end": 17,
           "column_start": 14,
           "column_end": 27,
           "is_primary": true,
@@ -91,13 +91,13 @@
     }
   ],
   "rendered": "warning: unnecessary parentheses around assigned value
-  --> $DIR/unused_parens_json_suggestion.rs:15:14
+  --> $DIR/unused_parens_json_suggestion.rs:17:14
    |
 LL |     let _a = (1 / (2 + 3));
    |              ^^^^^^^^^^^^^ help: remove these parentheses
    |
 note: lint level defined here
-  --> $DIR/unused_parens_json_suggestion.rs:10:9
+  --> $DIR/unused_parens_json_suggestion.rs:11:9
    |
 LL | #![warn(unused_parens)]
    |         ^^^^^^^^^^^^^

src/test/ui/lint/unused_parens_remove_json_suggestion.fixed

@@ -0,0 +1,62 @@
+// compile-flags: --error-format pretty-json -Zunstable-options
+// build-pass
+// run-rustfix
+
+// The output for humans should just highlight the whole span without showing
+// the suggested replacement, but we also want to test that suggested
+// replacement only removes one set of parentheses, rather than naïvely
+// stripping away any starting or ending parenthesis characters—hence this
+// test of the JSON error format.
+
+#![warn(unused_parens)]
+#![allow(unreachable_code)]
+
+fn main() {
+
+    let _b = false;
+
+    if _b {
+        println!("hello");
+    }
+
+    f();
+
+}
+
+fn f() -> bool {
+    let c = false;
+
+    if c {
+        println!("next");
+    }
+
+    if c {
+        println!("prev");
+    }
+
+    while false && true {
+        if c {
+            println!("norm");
+        }
+
+    }
+
+    while true && false {
+        for _ in 0 .. 3 {
+            println!("e~")
+        }
+    }
+
+    for _ in 0 .. 3 {
+        while true && false {
+            println!("e~")
+        }
+    }
+
+
+    loop {
+        if (break { return true }) {
+        }
+    }
+    false
+}

src/test/ui/lint/used_parens_remove_json_suggestion.rs renamed to src/test/ui/lint/unused_parens_remove_json_suggestion.rs

@@ -1,5 +1,6 @@
 // compile-flags: --error-format pretty-json -Zunstable-options
 // build-pass
+// run-rustfix
 
 // The output for humans should just highlight the whole span without showing
 // the suggested replacement, but we also want to test that suggested
@@ -8,6 +9,7 @@
 // test of the JSON error format.
 
 #![warn(unused_parens)]
+#![allow(unreachable_code)]
 
 fn main() {
 
@@ -40,12 +42,12 @@ fn f() -> bool {
     }
 
     while(true && false) {
-        for i in (0 .. 3){
+        for _ in (0 .. 3){
             println!("e~")
         }
     }
 
-    for i in (0 .. 3) {
+    for _ in (0 .. 3) {
         while (true && false) {
             println!("e~")
         }