diff --git a/TODO.md b/TODO.md
index 43cb7c9..09da2cc 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,6 +1,6 @@
- 1. parse cli parameters
- 2. read from stdin
- 3. split stdin into columns (column/awk commands)
+ 1.  parse cli parameters
+ 2.  read from stdin
+ 3.  split stdin into columns 
  3. map (execute) commands to fields
    - [ ] execute a command on first text column
  4. print resulting concatenated columns
diff --git a/src/main.rs b/src/main.rs
index ae3bd2c..c3a9fed 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -104,19 +104,9 @@ fn main() -> Result<()> {
 
     assert!(input_text.n_cols()? >= cli.yargs.len());
     
-
-
-
     // TODO: RESULT
     print!("{}", raw_input);
 
 
-
-
-    //
-    // cmd.error(ErrorKind::ValueValidation, "invalid")
-    //     .exit()
-    // validate number of 
     Ok(())
 }
-
diff --git a/tests/cli.rs b/tests/cli.rs
index 2267127..2ab90c8 100644
--- a/tests/cli.rs
+++ b/tests/cli.rs
@@ -1,5 +1,3 @@
-//TODO:
-
 use std::error::Error;
 use assert_cmd::Command;
 // use assert_cmd::prelude::*;
@@ -52,3 +50,15 @@ fn fail_yargs_mismatch1() -> TestResult {
 }
 
 
+// n args <= n cols
+#[test]
+fn cli_pass2() -> TestResult {
+    run_args("tests/inputs/input1", &["1", "2", "3", "4", "5", "6"])
+}
+
+#[test]
+#[should_panic]
+// more arguments passed than columns
+fn cli_fail1()  {
+    run_args("tests/inputs/input1", &["1", "2", "3", "4", "5", "6", "7", "8"]).unwrap()
+}