fix: wait custom server for port

tests/args.rs

@@ -3,7 +3,7 @@ mod utils;
 
 use assert_cmd::prelude::*;
 use assert_fs::fixture::TempDir;
-use fixtures::{port, server, tmpdir, Error, TestServer};
+use fixtures::{port, server, tmpdir, wait_for_port, Error, TestServer};
 use rstest::rstest;
 use std::process::{Command, Stdio};
 
@@ -43,6 +43,8 @@ fn serve_single_file(tmpdir: TempDir, port: u16, #[case] file: &str) -> Result<(
         .stdout(Stdio::piped())
         .spawn()?;
 
+    wait_for_port(port);
+
     let resp = reqwest::blocking::get(format!("http://localhost:{}/index.html", port))?;
     assert_eq!(resp.text()?, "This is index.html");
 

tests/bind.rs

@@ -1,6 +1,6 @@
 mod fixtures;
 
-use fixtures::{port, server, tmpdir, Error, TestServer};
+use fixtures::{port, server, tmpdir, wait_for_port, Error, TestServer};
 
 use assert_cmd::prelude::*;
 use assert_fs::fixture::TempDir;
@@ -59,6 +59,8 @@ fn validate_printed_urls(tmpdir: TempDir, port: u16, #[case] args: &[&str]) -> R
         .stdout(Stdio::piped())
         .spawn()?;
 
+    wait_for_port(port);
+
     // WARN assumes urls list is terminated by an empty line
     let url_lines = BufReader::new(child.stdout.take().unwrap())
         .lines()

tests/fixtures.rs

@@ -142,7 +142,7 @@ where
 }
 
 /// Wait a max of 1s for the port to become available.
-fn wait_for_port(port: u16) {
+pub fn wait_for_port(port: u16) {
     let start_wait = Instant::now();
 
     while !port_check::is_port_reachable(format!("localhost:{}", port)) {