added very basic acceptance testing, fixes #2

Signed-off-by: Konstantin Läufer <[email protected]>

tests/main.rs

@@ -0,0 +1,13 @@
+extern crate assert_cmd;
+extern crate predicates;
+use assert_cmd::Command;
+use predicates::prelude::*;
+
+#[test]
+fn fakeps_runs_without_args() {
+    let mut cmd = Command::cargo_bin("fakeps").unwrap();
+    cmd.assert()
+    .success()
+    .stdout(predicate::str::contains("PID"))
+    .stdout(predicate::str::contains("Fake process"));
+}