skill: add basic implementation

tests/by-util/test_skill.rs

@@ -0,0 +1,13 @@
+// This file is part of the uutils procps package.
+//
+// For the full copyright and license information, please view the LICENSE
+// file that was distributed with this source code.
+
+use uutests::new_ucmd;
+use uutests::util::TestScenario;
+use uutests::util_name;
+
+#[test]
+fn test_no_args() {
+    new_ucmd!().fails().code_is(1);
+}

tests/tests.rs

@@ -63,6 +63,10 @@ mod test_top;
 #[path = "by-util/test_vmstat.rs"]
 mod test_vmstat;
 
+#[cfg(feature = "skill")]
+#[path = "by-util/test_skill.rs"]
+mod test_skill;
+
 #[cfg(feature = "snice")]
 #[path = "by-util/test_snice.rs"]
 mod test_snice;