Add more configuration tests

src/test/server_invalid_tls_config_invalid_cert.rs

@@ -1,6 +1,7 @@
 use crate::tcp_relay_server::server_config::ServerConfig;
 use crate::test::pki::Pki;
-use crate::test::{get_port_number, PortsAllocation};
+use crate::test::test_files_utils::create_temp_file_with_random_content;
+use crate::test::{get_port_number, PortsAllocation, BAD_PATH};
 
 const TOKEN: &str = "mytok";
 
@@ -9,7 +10,29 @@ fn port(index: u16) -> u16 {
 }
 
 #[tokio::test]
-async fn test() {
+async fn unspecified() {
+    let _ = env_logger::builder().is_test(true).try_init();
+
+    let pki = Pki::load();
+
+    crate::tcp_relay_server::run_app(ServerConfig {
+        tokens: vec![TOKEN.to_string()],
+        tokens_file: None,
+        ports: vec![port(1)],
+        upstream_server: "127.0.0.1".to_string(),
+        listen_address: format!("127.0.0.1:{}", port(0)),
+        increment_ports: 1,
+        tls_cert: None,
+        tls_key: Some(pki.localhost_key.file_path()),
+        tls_client_auth_root_cert: None,
+        tls_revocation_list: None,
+    })
+    .await
+    .unwrap_err();
+}
+
+#[tokio::test]
+async fn incorrect_pem_type() {
     let _ = env_logger::builder().is_test(true).try_init();
 
     let pki = Pki::load();
@@ -29,3 +52,49 @@ async fn test() {
     .await
     .unwrap_err();
 }
+
+#[tokio::test]
+async fn random_contents() {
+    let _ = env_logger::builder().is_test(true).try_init();
+
+    let pki = Pki::load();
+
+    let random_file = create_temp_file_with_random_content();
+
+    crate::tcp_relay_server::run_app(ServerConfig {
+        tokens: vec![TOKEN.to_string()],
+        tokens_file: None,
+        ports: vec![port(1)],
+        upstream_server: "127.0.0.1".to_string(),
+        listen_address: format!("127.0.0.1:{}", port(0)),
+        increment_ports: 1,
+        tls_cert: Some(random_file.to_string_lossy().to_string()),
+        tls_key: Some(pki.localhost_key.file_path()),
+        tls_client_auth_root_cert: None,
+        tls_revocation_list: None,
+    })
+    .await
+    .unwrap_err();
+}
+
+#[tokio::test]
+async fn invalid_path() {
+    let _ = env_logger::builder().is_test(true).try_init();
+
+    let pki = Pki::load();
+
+    crate::tcp_relay_server::run_app(ServerConfig {
+        tokens: vec![TOKEN.to_string()],
+        tokens_file: None,
+        ports: vec![port(1)],
+        upstream_server: "127.0.0.1".to_string(),
+        listen_address: format!("127.0.0.1:{}", port(0)),
+        increment_ports: 1,
+        tls_cert: Some(BAD_PATH.to_string()),
+        tls_key: Some(pki.localhost_key.file_path()),
+        tls_client_auth_root_cert: None,
+        tls_revocation_list: None,
+    })
+    .await
+    .unwrap_err();
+}