test(persona-soak): claim-and-abandon persona (SIGKILLed process with a large claim backlog)

awa/tests/persona_soak/adminserver.rs

@@ -0,0 +1,132 @@
+//! The real admin HTTP server (`awa serve`), run as a child process against the soak
+//! database so the UI personas exercise the same code the web UI talks to.
+
+use super::config::SoakConfig;
+use std::net::TcpListener;
+use std::path::PathBuf;
+use std::process::{Child, Command, Stdio};
+use std::time::{Duration, Instant};
+
+pub const APPLICATION_NAME: &str = "soak_ui_server";
+
+pub struct AdminServer {
+    child: Child,
+    pub base_url: String,
+    pub statement_timeout: Duration,
+    pub pool_max: u32,
+}
+
+/// Looks for the `awa` binary next to the test executable, where
+/// `cargo build --release -p awa-cli` puts it, unless `AWA_SOAK_AWA_BIN` names one.
+pub fn locate_binary(config: &SoakConfig) -> Result<PathBuf, String> {
+    if let Some(path) = &config.awa_bin {
+        return path
+            .exists()
+            .then(|| path.clone())
+            .ok_or_else(|| format!("AWA_SOAK_AWA_BIN {} does not exist", path.display()));
+    }
+    let exe = std::env::current_exe().map_err(|error| error.to_string())?;
+    let candidate = exe
+        .parent()
+        .and_then(|deps| deps.parent())
+        .map(|profile| profile.join("awa"));
+    match candidate {
+        Some(path) if path.exists() => Ok(path),
+        _ => Err(
+            "the admin UI personas need the awa binary: run `cargo build --release -p awa-cli` \
+                  or set AWA_SOAK_AWA_BIN"
+                .to_string(),
+        ),
+    }
+}
+
+impl AdminServer {
+    pub async fn start(config: &SoakConfig) -> Result<Self, String> {
+        let binary = locate_binary(config)?;
+        let port = TcpListener::bind("127.0.0.1:0")
+            .and_then(|listener| listener.local_addr())
+            .map_err(|error| format!("pick a port: {error}"))?
+            .port();
+        let separator = if config.database_url.contains('?') {
+            '&'
+        } else {
+            '?'
+        };
+        let url = format!(
+            "{}{separator}application_name={APPLICATION_NAME}",
+            config.database_url
+        );
+        let statement_timeout = config.ui_statement_timeout;
+        let log = std::fs::File::create(config.report_dir.join("awa-serve.log"))
+            .or_else(|_| {
+                std::fs::create_dir_all(&config.report_dir)?;
+                std::fs::File::create(config.report_dir.join("awa-serve.log"))
+            })
+            .map_err(|error| format!("create awa-serve.log: {error}"))?;
+        let child = Command::new(&binary)
+            .args([
+                "--database-url",
+                &url,
+                "serve",
+                "--host",
+                "127.0.0.1",
+                "--port",
+                &port.to_string(),
+            ])
+            .args([
+                "--statement-timeout",
+                &statement_timeout.as_secs().to_string(),
+            ])
+            .args([
+                "--pool-max",
+                &config.ui_pool_max.to_string(),
+                "--pool-min",
+                "2",
+            ])
+            .stdout(Stdio::from(
+                log.try_clone().map_err(|error| error.to_string())?,
+            ))
+            .stderr(Stdio::from(log))
+            .spawn()
+            .map_err(|error| format!("spawn {}: {error}", binary.display()))?;
+        let mut server = Self {
+            child,
+            base_url: format!("http://127.0.0.1:{port}"),
+            statement_timeout,
+            pool_max: config.ui_pool_max,
+        };
+        let client = reqwest::Client::new();
+        let deadline = Instant::now() + Duration::from_secs(60);
+        loop {
+            if let Ok(Some(status)) = server.child.try_wait() {
+                return Err(format!("awa serve exited during startup: {status}"));
+            }
+            if let Ok(response) = client
+                .get(format!("{}/api/capabilities", server.base_url))
+                .send()
+                .await
+            {
+                if response.status().is_success() {
+                    return Ok(server);
+                }
+            }
+            if Instant::now() >= deadline {
+                return Err("awa serve did not start listening within 60s".to_string());
+            }
+            tokio::time::sleep(Duration::from_millis(300)).await;
+        }
+    }
+
+    pub fn is_running(&mut self) -> bool {
+        matches!(self.child.try_wait(), Ok(None))
+    }
+
+    pub fn stop(self) {}
+}
+
+impl Drop for AdminServer {
+    fn drop(&mut self) {
+        let _ = self.child.kill();
+        let _ = self.child.wait();
+    }
+}