Add unittest for cookie handling on redirects.

src/test/agent_test.rs

@@ -99,3 +99,50 @@ fn connection_reuse() {
     }
     assert_eq!(resp.status(), 200);
 }
+
+#[cfg(test)]
+fn cookie_and_redirect(mut stream: TcpStream) -> io::Result<()> {
+    let headers = read_headers(&stream);
+    match headers.path() {
+        "/first" => {
+            stream.write_all(b"HTTP/1.1 302 Found\r\n")?;
+            stream.write_all(b"Location: /second\r\n")?;
+            stream.write_all(b"Set-Cookie: first=true\r\n")?;
+            stream.write_all(b"Content-Length: 0\r\n\r\n")?;
+        },
+        "/second" => {
+            if headers.headers().iter().find(|&x| x.contains("Cookie: first")).is_none() {
+                panic!("request did not contain cookie 'first'");
+            }
+            stream.write_all(b"HTTP/1.1 302 Found\r\n")?;
+            stream.write_all(b"Location: /third\r\n")?;
+            stream.write_all(b"Set-Cookie: second=true\r\n")?;
+            stream.write_all(b"Content-Length: 0\r\n\r\n")?;
+        },
+        "/third" => {
+            if headers.headers().iter().find(|&x| x.contains("Cookie: first")).is_none() {
+                panic!("request did not contain cookie 'second'");
+            }
+            stream.write_all(b"HTTP/1.1 200 OK\r\n")?;
+            stream.write_all(b"Set-Cookie: third=true\r\n")?;
+            stream.write_all(b"Content-Length: 0\r\n\r\n")?;
+        },
+        _ => {},
+    }
+    Ok(())
+}
+
+#[cfg(feature = "cookie")]
+#[test]
+fn test_cookies_on_redirect() {
+    let testserver = TestServer::new(cookie_and_redirect);
+    let url = format!("http://localhost:{}/first", testserver.port);
+    let agent = Agent::default().build();
+    let resp = agent.post(&url).call();
+    if resp.error() {
+        panic!("error: {} {}", resp.status(), resp.into_string().unwrap());
+    }
+    assert!(agent.cookie("first").is_some());
+    assert!(agent.cookie("second").is_some());
+    assert!(agent.cookie("third").is_some());
+}

src/test/testserver.rs

@@ -9,14 +9,35 @@ pub struct TestServer {
     pub done: Arc<AtomicBool>,
 }
 
-// Read a stream until reaching a blank line, in order to consume
-// request headers.
-pub fn read_headers(stream: &TcpStream) {
-    for line in BufReader::new(stream).lines() {
-        if line.unwrap() == "" {
-            break;
+pub struct TestHeaders(Vec<String>);
+
+impl TestHeaders {
+    // Return the path for a request, e.g. /foo from "GET /foo HTTP/1.1"
+    pub fn path(&self) -> &str {
+        if self.0.len() == 0 {
+            ""
+        } else {
+            &self.0[0].split(" ").nth(1).unwrap()
         }
     }
+
+    pub fn headers(&self) -> &[String] {
+        &self.0[1..]
+    }
+}
+
+// Read a stream until reaching a blank line, in order to consume
+// request headers.
+pub fn read_headers(stream: &TcpStream) -> TestHeaders {
+    let mut results = vec![];
+    for line in BufReader::new(stream).lines() {
+        match line {
+            Err(e) => panic!(e),
+            Ok(line) if line == "" => break,
+            Ok(line) => results.push(line),
+        };
+    }
+    TestHeaders(results)
 }
 
 impl TestServer {