1 files changed, 26 insertions, 0 deletions
diff --git a/vendor/clap/examples/tutorial_builder/05_01_assert.rs b/vendor/clap/examples/tutorial_builder/05_01_assert.rs
new file mode 100644
index 000000000..d6f19ffe5
--- /dev/null
+++ b/vendor/clap/examples/tutorial_builder/05_01_assert.rs
@@ -0,0 +1,26 @@
+// Note: this requires the `cargo` feature
+
+use clap::{arg, command, value_parser};
+
+fn main() {
+    let matches = cmd().get_matches();
+
+    // Note, it's safe to call unwrap() because the arg is required
+    let port: usize = *matches
+        .get_one::<usize>("PORT")
+        .expect("'PORT' is required and parsing will fail if its missing");
+    println!("PORT = {}", port);
+}
+
+fn cmd() -> clap::Command<'static> {
+    command!().arg(
+        arg!(<PORT>)
+            .help("Network port to use")
+            .value_parser(value_parser!(usize)),
+    )
+}
+
+#[test]
+fn verify_app() {
+    cmd().debug_assert();
+}