test: Add integration tests

tests/integration_tests.rs

@@ -110,6 +110,27 @@ fn run_single_test_no_exercise() {
         .code(1);
 }
 
+#[test]
+fn reset_single_exercise() {
+    Command::cargo_bin("rustlings")
+        .unwrap()
+        .args(&["reset", "intro1"])
+        .assert()
+        .code(0);
+}
+
+#[test]
+fn reset_no_exercise() {
+    Command::cargo_bin("rustlings")
+        .unwrap()
+        .arg("reset")
+        .assert()
+        .code(1)
+        .stderr(predicates::str::contains(
+            "positional arguments not provided",
+        ));
+}
+
 #[test]
 fn get_hint_for_single_test() {
     Command::cargo_bin("rustlings")
@@ -126,7 +147,7 @@ fn all_exercises_require_confirmation() {
     for exercise in glob("exercises/**/*.rs").unwrap() {
         let path = exercise.unwrap();
         if path.file_name().unwrap() == "mod.rs" {
-            continue
+            continue;
         }
         let source = {
             let mut file = File::open(&path).unwrap();