Reset master to testing content

internal/atspi/flatpak_process_test.go

@@ -0,0 +1,54 @@
+// Copyright (c) 2026 Storm Dragon
+// Authors: Storm Dragon, Angus Kola
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package atspi
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestFlatpakProcessInstanceBoundaries(t *testing.T) {
+	root := t.TempDir()
+	write := func(pid int, data string) {
+		t.Helper()
+		dir := filepath.Join(root, fmt.Sprint(pid), "root")
+		if err := os.MkdirAll(dir, 0700); err != nil {
+			t.Fatal(err)
+		}
+		if err := os.WriteFile(filepath.Join(dir, ".flatpak-info"), []byte(data), 0600); err != nil {
+			t.Fatal(err)
+		}
+	}
+	metadata := "[Application]\nname=org.example.App\n[Instance]\ninstance-id=123\n"
+	write(100, metadata)
+	for _, test := range []struct {
+		name, data string
+		want       bool
+	}{
+		{"same instance", metadata, true},
+		{"other instance of same app", strings.ReplaceAll(metadata, "123", "456"), false},
+		{"other app", strings.ReplaceAll(metadata, "org.example.App", "org.example.Other"), false},
+		{"app ID alone", "[Application]\nname=org.example.App\n", false},
+		{"instance ID alone", "[Instance]\ninstance-id=123\n", false},
+		{"wrong section", "[Application]\nname=org.example.App\ninstance-id=123\n", false},
+		{"empty metadata", "", false},
+		{"malformed metadata", metadata + "broken", false},
+		{"duplicate identity", metadata + "instance-id=456\n", false},
+		{"oversized metadata", metadata + strings.Repeat("#", 65536), false},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			write(200, test.data)
+			if got := sameFlatpakInstance(root, 100, 200); got != test.want {
+				t.Fatalf("same instance = %v; want %v", got, test.want)
+			}
+		})
+	}
+	if sameFlatpakInstance(root, 100, 300) || sameFlatpakInstance(root, 300, 400) || sameFlatpakInstance(root, 0, 0) {
+		t.Fatal("missing process or unknown identity matched")
+	}
+}