fix check_diff formatting and add to tests

Author: benluiwj

check_diff/src/main.rs

@@ -9,15 +9,17 @@ struct CliInputs {
     /// Optional commit hash from the feature branch
     #[arg(short, long)]
     commit_hash: Option<String>,
-    /// Optional comma separated list of rustfmt config options to pass when running the feature branch
+    /// Optional comma separated list of rustfmt config options to
+    /// pass when running the feature branch
     #[arg(value_delimiter = ',', short, long,num_args = 1..)]
     rustfmt_config: Option<Vec<String>>,
 }
 
 fn main() {
     let args = CliInputs::parse();
     println!(
-        "remote_repo_url: {:?}, feature_branch: {:?}, optional_commit_hash: {:?}, optional_rustfmt_config: {:?}" ,
+        "remote_repo_url: {:?}, feature_branch: {:?},
+        optional_commit_hash: {:?}, optional_rustfmt_config: {:?}",
         args.remote_repo_url, args.feature_branch, args.commit_hash, args.rustfmt_config
-    )
+    );
 }

src/test/mod.rs

@@ -383,7 +383,13 @@ fn idempotence_tests() {
 fn self_tests() {
     init_log();
     let mut files = get_test_files(Path::new("tests"), false);
-    let bin_directories = vec!["cargo-fmt", "git-rustfmt", "bin", "format-diff"];
+    let bin_directories = vec![
+        "cargo-fmt",
+        "git-rustfmt",
+        "bin",
+        "format-diff",
+        "check_diff",
+    ];
     for dir in bin_directories {
         let mut path = PathBuf::from("src");
         path.push(dir);