add unit test for Config::verify

Signed-off-by: onur-ozkan <work@onurozkan.dev>

src/bootstrap/config/tests.rs

@@ -3,7 +3,12 @@ use crate::config::TomlConfig;
 use super::{Config, Flags};
 use clap::CommandFactory;
 use serde::Deserialize;
-use std::{env, path::Path};
+use std::{
+    env,
+    fs::{remove_file, File},
+    io::Write,
+    path::Path,
+};
 
 fn parse(config: &str) -> Config {
     Config::parse_inner(&["check".to_owned(), "--config=/does/not/exist".to_owned()], |&_| {
@@ -196,3 +201,22 @@ fn rust_optimize() {
 fn invalid_rust_optimize() {
     parse("rust.optimize = \"a\"");
 }
+
+#[test]
+fn verify_file_integrity() {
+    let config = parse("");
+
+    let tempfile = config.tempdir().join(".tmp-test-file");
+
+    let mut file = File::create(&tempfile).unwrap();
+    assert!(tempfile.exists());
+
+    let file_content = b"dummy value";
+    file.write_all(file_content).unwrap();
+    assert!(
+        config
+            .verify(&tempfile, "7e255dd9542648a8779268a0f268b891a198e9828e860ed23f826440e786eae5")
+    );
+
+    remove_file(tempfile).unwrap();
+}

src/bootstrap/download.rs

@@ -320,7 +320,7 @@ impl Config {
     }
 
     /// Returns whether the SHA256 checksum of `path` matches `expected`.
-    fn verify(&self, path: &Path, expected: &str) -> bool {
+    pub(crate) fn verify(&self, path: &Path, expected: &str) -> bool {
         use sha2::Digest;
 
         self.verbose(&format!("verifying {}", path.display()));