Add regression tests.

1 files changed, 15 insertions, 0 deletions

diff --git a/04/tests/main.rs b/04/tests/main.rs
new file mode 100644
index 0000000..e6b8622
--- /dev/null
+++ b/04/tests/main.rs
@@ -0,0 +1,15 @@
+use assert_cmd::prelude::*;
+//use predicates::prelude::*;
+use std::process::Command;
+
+
+#[test]
+fn personal_input() -> Result<(), Box<dyn std::error::Error>> {
+  let mut command = Command::cargo_bin("advent_04")?;
+
+  command.arg("input");
+  command.assert().success().stdout("103\n");
+
+  Ok(())
+}
+