After commit c018f5fd29 Fenrir is being switched over to go. If you do not want to be part of the testing process, please switch to master.

internal/console/input_watcher_linux_test.go

@@ -0,0 +1,116 @@
+// Fenrir console screen reader.
+// Copyright (c) 2026 Storm Dragon
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by the Free
+// Software Foundation, either version 3 of the License, or (at your option)
+// any later version.
+//
+// This program is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+// more details.
+//
+// You should have received a copy of the GNU General Public License along with
+// this program. If not, see <https://www.gnu.org/licenses/gpl-3.0.html>.
+
+//go:build linux && cgo
+
+package console
+
+import (
+	"os"
+	"syscall"
+	"testing"
+	"time"
+)
+
+func TestInputWatcherReadinessRearmAndHotplug(t *testing.T) {
+	watcher, err := newReadinessWatcher(syscall.EPOLLIN)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer watcher.close()
+	for device := 0; device < 2; device++ {
+		readEnd, writeEnd, err := os.Pipe()
+		if err != nil {
+			t.Fatal(err)
+		}
+		t.Cleanup(func() { readEnd.Close(); writeEnd.Close() })
+		if err := watcher.add(int(readEnd.Fd())); err != nil {
+			t.Fatal(err)
+		}
+		for press := 0; press < 2; press++ {
+			if _, err := writeEnd.Write([]byte{1}); err != nil {
+				t.Fatal(err)
+			}
+			select {
+			case err := <-watcher.events:
+				if err != nil {
+					t.Fatal(err)
+				}
+			case <-time.After(time.Second):
+				t.Fatal("input did not wake epoll")
+			}
+			var data [1]byte
+			if _, err := readEnd.Read(data[:]); err != nil {
+				t.Fatal(err)
+			}
+			if err := watcher.arm(int(readEnd.Fd())); err != nil {
+				t.Fatal(err)
+			}
+		}
+		readEnd.Close()
+		writeEnd.Close()
+	}
+}
+
+func TestInputWatcherIdleShutdown(t *testing.T) {
+	watcher, err := newReadinessWatcher(syscall.EPOLLIN)
+	if err != nil {
+		t.Fatal(err)
+	}
+	closed := make(chan error, 1)
+	go func() { closed <- watcher.close() }()
+	select {
+	case err := <-closed:
+		if err != nil {
+			t.Fatal(err)
+		}
+	case <-time.After(time.Second):
+		t.Fatal("idle watcher failed to wake on shutdown")
+	}
+}
+
+func BenchmarkInputReadiness(b *testing.B) {
+	watcher, err := newReadinessWatcher(syscall.EPOLLIN)
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer watcher.close()
+	readEnd, writeEnd, err := os.Pipe()
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer readEnd.Close()
+	defer writeEnd.Close()
+	if err := watcher.add(int(readEnd.Fd())); err != nil {
+		b.Fatal(err)
+	}
+	var data [1]byte
+	for b.Loop() {
+		if _, err := writeEnd.Write(data[:]); err != nil {
+			b.Fatal(err)
+		}
+		if err := <-watcher.events; err != nil {
+			b.Fatal(err)
+		}
+		if _, err := readEnd.Read(data[:]); err != nil {
+			b.Fatal(err)
+		}
+		if err := watcher.arm(int(readEnd.Fd())); err != nil {
+			b.Fatal(err)
+		}
+	}
+}