Stabilize live site smoke output

crates/ely_servo_host/tests/software_host.rs

@@ -1,6 +1,12 @@
 #![cfg(feature = "servo-engine")]
 
-use std::{error::Error, thread, time::Duration};
+use std::{
+    env,
+    error::Error,
+    process::{Command, Stdio},
+    thread,
+    time::Duration,
+};
 
 use ely_domain::{ProfileId, TabId, UrlText};
 use ely_servo_host::{
@@ -18,6 +24,7 @@ const PRD_SITE_COMPATIBILITY_CASES: &[PrdSiteCompatibilityCase] = &[
     PrdSiteCompatibilityCase { url: "https://example.com", title_fragment: "Example Domain" },
     PrdSiteCompatibilityCase { url: "https://servo.org/", title_fragment: "Servo" },
 ];
+const SOFTWARE_HOST_CHILD_ENV: &str = "ELY_SERVO_SOFTWARE_HOST_CHILD";
 const CLICK_PROBE_URL: &str = "data:text/html,%3C!doctype%20html%3E%3Ctitle%3EClick%20Probe%3C%2Ftitle%3E%3Cstyle%3Ebody%7Bmargin%3A0%3Bbackground%3A%23f7f7f7%3B%7Dbutton%7Bposition%3Aabsolute%3Bleft%3A80px%3Btop%3A80px%3Bwidth%3A220px%3Bheight%3A90px%3Bfont%3A28px%20sans-serif%3Bbackground%3A%23ffffff%3Bcolor%3A%23111111%3B%7D%3C%2Fstyle%3E%3Cbutton%20onclick%3D%22document.body.style.background%3D%27%230039ff%27%3Bdocument.title%3D%27Clicked%27%3Bthis.textContent%3D%27Clicked%27%3B%22%3ETap%3C%2Fbutton%3E";
 const DRAG_PROBE_URL: &str = "data:text/html,%3C%21doctype%20html%3E%3Ctitle%3EDrag%20Probe%3C%2Ftitle%3E%3Cstyle%3Ebody%7Bmargin%3A0%3Bbackground%3A%23f7f7f7%3B%7Dbutton%7Bposition%3Aabsolute%3Bleft%3A80px%3Btop%3A80px%3Bwidth%3A220px%3Bheight%3A90px%3Bfont%3A28px%20sans-serif%3Bbackground%3A%23ffffff%3Bcolor%3A%23111111%3B%7D%3C%2Fstyle%3E%3Cbutton%20id%3Dbox%3EDrag%3C%2Fbutton%3E%3Cscript%3Elet%20dragging%3Dfalse%3Bconst%20box%3Ddocument.getElementById%28%27box%27%29%3BaddEventListener%28%27mousedown%27%2Cevent%3D%3E%7Bif%28event.target%3D%3D%3Dbox%29%7Bdragging%3Dtrue%3B%7D%7D%29%3BaddEventListener%28%27mousemove%27%2Cevent%3D%3E%7Bif%28dragging%26%26event.clientX%3E280%29%7Bdocument.body.style.background%3D%27%230039ff%27%3Bdocument.title%3D%27Dragged%27%3Bbox.textContent%3D%27Dragged%27%3B%7D%7D%29%3BaddEventListener%28%27mouseup%27%2C%28%29%3D%3E%7Bdragging%3Dfalse%3B%7D%29%3B%3C%2Fscript%3E";
 const TOUCH_PROBE_URL: &str = "data:text/html,%3C%21doctype%20html%3E%3Ctitle%3ETouch%20Probe%3C%2Ftitle%3E%3Cstyle%3Ebody%7Bmargin%3A0%3Bbackground%3A%23f7f7f7%3B%7Dbutton%7Bposition%3Aabsolute%3Bleft%3A80px%3Btop%3A80px%3Bwidth%3A220px%3Bheight%3A90px%3Bfont%3A28px%20sans-serif%3Bbackground%3A%23ffffff%3Bcolor%3A%23111111%3Btouch-action%3Amanipulation%3B%7D%3C%2Fstyle%3E%3Cbutton%20ontouchstart%3D%22document.body.dataset.touch%3D%27start%27%3B%22%20onclick%3D%22document.body.style.background%3D%27%230039ff%27%3Bdocument.title%3D%27Touched%27%3Bthis.textContent%3D%27Touched%27%3B%22%3ETap%3C%2Fbutton%3E";
@@ -31,6 +38,36 @@ struct PrdSiteCompatibilityCase {
 
 #[test]
 fn manages_real_servo_webview_lifecycle() -> Result<(), Box<dyn Error>> {
+    if env::var_os(SOFTWARE_HOST_CHILD_ENV).is_none() {
+        return run_isolated_software_host_lifecycle();
+    }
+
+    exercise_real_servo_webview_lifecycle()
+}
+
+fn run_isolated_software_host_lifecycle() -> Result<(), Box<dyn Error>> {
+    let output = Command::new(env::current_exe()?)
+        .arg("--exact")
+        .arg("manages_real_servo_webview_lifecycle")
+        .env(SOFTWARE_HOST_CHILD_ENV, "1")
+        .stdout(Stdio::piped())
+        .stderr(Stdio::piped())
+        .output()?;
+
+    if output.status.success() {
+        return Ok(());
+    }
+
+    Err(format!(
+        "isolated software host lifecycle failed\nstatus: {}\nstdout: {}\nstderr: {}",
+        output.status,
+        String::from_utf8_lossy(&output.stdout),
+        String::from_utf8_lossy(&output.stderr)
+    )
+    .into())
+}
+
+fn exercise_real_servo_webview_lifecycle() -> Result<(), Box<dyn Error>> {
     let mut host = SoftwareServoHost::new(ServoSurfaceSize::new(INITIAL_WIDTH, INITIAL_HEIGHT))?;
     let tab_id = TabId::new();
     let profile_id = ProfileId::new();