Add site compatibility diagnostics page

crates/ely_browser_core/tests/site_compatibility.rs

@@ -0,0 +1,19 @@
+use std::error::Error;
+
+use ely_browser_core::{BrowserCore, InitialBrowserConfig};
+use ely_domain::CommandIntent;
+
+#[test]
+fn open_site_compatibility_command_opens_diagnostics_page() -> Result<(), Box<dyn Error>> {
+    let mut core = BrowserCore::new(InitialBrowserConfig::ely_defaults()?)?;
+
+    core.set_command_query(">open-site-compatibility");
+    let intent = core.submit_command()?;
+    let active_tab = core.active_tab()?;
+
+    assert_eq!(intent, Some(CommandIntent::Command("open-site-compatibility".to_string())));
+    assert_eq!(active_tab.title(), "Site Compatibility");
+    assert_eq!(active_tab.url().as_str(), "ely://site-compatibility");
+    assert_eq!(core.snapshot()?.command_query, "");
+    Ok(())
+}