Add regression tests.

2 files changed, 18 insertions, 0 deletions

diff --git a/04/Cargo.toml b/04/Cargo.toml
index 00ee1d2..720a70b 100644
--- a/04/Cargo.toml
+++ b/04/Cargo.toml
@@ -7,3 +7,6 @@ edition = "2018"
 [dependencies]
 advent_lib = { path = "../lib" }
 regex = "1"
+
+[dev-dependencies]
+assert_cmd = "0.10"
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(())
+}
+