feat: devices via caps (BootInfo, init assigns devices, drivers map MMIO/DMA themselves, IRQ-driven input); drop boot device wiring and info pages; headless display fallback

crates/servers/input-server/src/tests/server.rs

@@ -49,3 +49,39 @@ fn char_event_preserved() {
     let resp = server.handle(InputRequest::PollEvent);
     assert_eq!(resp, InputResponse::Event(InputEvent::KeyDown(Key::Char(b'z'))));
 }
+
+#[test]
+fn an_interrupt_buffers_events_until_asked() {
+    let mut device = MockInputDevice::new();
+    device.push_event(InputEvent::KeyDown(Key::Up));
+    device.push_event(InputEvent::KeyDown(Key::Down));
+    let mut server = InputServer::with_irq(device, types::bounded::CapSlot::new(1).unwrap());
+    server.signal(1);
+    // The device itself is now drained; the events wait in the server.
+    assert!(!port_input_device::InputDevice::has_event(server.device()));
+    assert_eq!(
+        server.handle(InputRequest::PollEvent),
+        InputResponse::Event(InputEvent::KeyDown(Key::Up))
+    );
+    assert_eq!(
+        server.handle(InputRequest::PollEvent),
+        InputResponse::Event(InputEvent::KeyDown(Key::Down))
+    );
+    assert_eq!(server.handle(InputRequest::PollEvent), InputResponse::NoEvent);
+}
+
+#[test]
+fn a_full_buffer_drops_the_oldest_event() {
+    let mut server = InputServer::with_irq(MockInputDevice::new(), types::bounded::CapSlot::new(1).unwrap());
+    // 40 interrupts, one key each; the buffer keeps the last 32.
+    for i in 0..40u8 {
+        let mut device = MockInputDevice::new();
+        device.push_event(InputEvent::KeyDown(Key::Char(i)));
+        server.replace_device_for_test(device);
+        server.signal(1);
+    }
+    assert_eq!(
+        server.handle(InputRequest::PollEvent),
+        InputResponse::Event(InputEvent::KeyDown(Key::Char(8)))
+    );
+}