refactor: imtegration test to use a temp dir for output file

.gitignore

@@ -1,3 +1,3 @@
 /target
 be2json
-output.json
+output.json

Cargo.toml

@@ -10,3 +10,4 @@ thiserror = "1.0.64"
 
 [dev-dependencies]
 assert_cmd = "2.0"
+tempfile = "3.13.0"

project-words.txt

@@ -15,4 +15,6 @@ llee
 llleee
 spame
 spamee
+tempdir
+tempfile
 thiserror

src/parsers/string.rs

@@ -5,10 +5,10 @@ use std::io::{self, Read};
 
 use crate::rw::{byte_reader::ByteReader, writer::Writer};
 
-/* todo:
-    - Optimize UTF-8 conversion. Try to convert to string partially or parts and
-      stop converting if we reach a point when input is not valid UTF-8 anymore.
-      This way we don't consume more memory.
+/* todo: Optimize UTF-8 conversion. Try to convert to string partially and stop
+    converting if we reach a point when input is not valid UTF-8 anymore. This
+    way we don't consume more memory and we can print the bytes directly to the
+    output from that point on.
 */
 
 use core::str;

tests/integration.rs

@@ -1,17 +1,25 @@
 use assert_cmd::Command;
+use std::fs;
+use tempfile::tempdir;
 
 #[test]
 fn test_from_file() {
+    let temp_dir = tempdir().unwrap();
+
+    let output_file = temp_dir.path().join("output.json");
+
     let mut cmd = Command::cargo_bin("torrust-bencode2json").unwrap();
+
     cmd.arg("-i")
         .arg("tests/fixtures/sample.bencode")
         .arg("-o")
-        .arg("output.json")
+        .arg(output_file.to_str().unwrap())
         .assert()
         .success();
 
-    // todo: check contents
-    // Read the file. It should contain: ["spam"]
+    let output_content = fs::read_to_string(output_file).expect("Failed to read output file");
+
+    assert_eq!(output_content.trim(), r#"["spam"]"#);
 }
 
 #[test]