fix(tabs): keep the remembered active tab when closing a background tab

crates/ely_browser_core/tests/tab_active_memory.rs

@@ -0,0 +1,25 @@
+use std::error::Error;
+
+use ely_browser_core::{BrowserCore, InitialBrowserConfig};
+use ely_domain::{ProfileKind, UrlText};
+
+#[test]
+fn closing_a_background_tab_keeps_the_remembered_active_tab() -> Result<(), Box<dyn Error>> {
+    let mut core = BrowserCore::new(InitialBrowserConfig::ely_defaults()?)?;
+    let first_profile_id = core.active_tab()?.profile_id().clone();
+    let tab_a = core.open_tab(UrlText::parse("https://example.com/a")?);
+    let _tab_b = core.open_tab(UrlText::parse("https://example.com/b")?);
+    let tab_c = core.open_tab(UrlText::parse("https://example.com/c")?);
+    core.select_tab(&tab_a)?;
+
+    core.close_tab(&tab_c)?;
+
+    core.create_profile("Second", 0xf54e00, ProfileKind::Standard)?;
+    let restored = core.select_profile(&first_profile_id)?;
+
+    assert_eq!(
+        restored, tab_a,
+        "closing a background tab must not clobber the remembered active tab"
+    );
+    Ok(())
+}