test: Ensure we can read proxy params from environment

Tests for correctly retrieving the proxy (host, port) tuple from
$https_proxy by directly calling env_proxy::for_url()

Author: inejge

download/tests/read-proxy-env.rs

@@ -0,0 +1,30 @@
+#![cfg(feature = "reqwest-backend")]
+
+use std::env::{remove_var, set_var};
+
+use env_proxy::for_url;
+use url::Url;
+
+fn scrub_env() {
+    remove_var("http_proxy");
+    remove_var("https_proxy");
+    remove_var("HTTPS_PROXY");
+    remove_var("ftp_proxy");
+    remove_var("FTP_PROXY");
+    remove_var("all_proxy");
+    remove_var("ALL_PROXY");
+    remove_var("no_proxy");
+    remove_var("NO_PROXY");
+}
+
+// Tests for correctly retrieving the proxy (host, port) tuple from $https_proxy
+#[test]
+fn read_basic_proxy_params() {
+    scrub_env();
+    set_var("https_proxy", "http://proxy.example.com:8080");
+    let u = Url::parse("https://www.example.org").ok().unwrap();
+    assert_eq!(
+        for_url(&u).host_port(),
+        Some(("proxy.example.com".to_string(), 8080))
+    );
+}