feat(add): prevent adding a file without changes

tests/add.rs

@@ -40,6 +40,8 @@ fn collect_status_lines(client: &mut ClientTest) -> Vec<String> {
 
 #[cfg(test)]
 mod add_tests {
+    use crate::utils::{server::ServerTest, status_utils::status_should_be_empty};
+
     use super::*;
 
     #[test]
@@ -95,14 +97,24 @@ mod add_tests {
     }
 
     #[test]
-    fn add_no_change() {
-        assert!(false);
+    fn add_file_no_changes() {
         // add a file push it and add it again
-        // let id = get_random_test_id();
-        // let mut client = ClientTest::new(id).init();
-        //
-        // 
-        // client.clean();
+        let id = get_random_test_id();
+        let mut server = ServerTest::new(id.clone());
+        server.init();
+        let mut client = ClientTest::new(id).init();
+
+        let _ = client.add_file("file1", "foo");
+        client.run_cmd_ok("add file1");
+        client.run_cmd_ok("push");
+
+        status_should_be_empty(&mut client);
+
+        client.run_cmd_ok("add file1");
+        status_should_be_empty(&mut client);
+
+        client.clean();
+        server.clean();
     }
 
 }

tests/utils/status_utils.rs

@@ -15,13 +15,13 @@ pub fn status_should_be_empty(client: &mut ClientTest) {
     let (staged, not_staged) = client.get_status();
     if staged.len() != 0 {
         eprintln!("id: {}", client.test_id.clone());
-        eprintln!("Staged should be empty but has '{}'", staged.len());
+        eprintln!("Staged should be empty but has '{}' line(s)", staged.len());
         assert!(staged.len() == 0);
     }
 
     if staged.len() != 0 {
         eprintln!("id: {}", client.test_id.clone());
-        eprintln!("Not Staged should be empty but has '{}'", not_staged.len());
+        eprintln!("Not Staged should be empty but has '{}' line(s)", not_staged.len());
         assert!(not_staged.len() == 0);
     }
 }