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package namespace
import (
"os"
"testing"
"time"
)
type mockFileInfo struct {
name string
}
func (m *mockFileInfo) Name() string { return m.name }
func (m *mockFileInfo) Size() int64 { return 0 }
func (m *mockFileInfo) Mode() os.FileMode { return 0 }
func (m *mockFileInfo) ModTime() time.Time { return time.Now() }
func (m *mockFileInfo) IsDir() bool { return false }
func (m *mockFileInfo) Sys() any { return nil }
type mockFS struct {
files map[string][]byte
canOpen map[string]bool
}
func (m *mockFS) Stat(name string) (os.FileInfo, error) {
if _, ok := m.files[name]; ok {
return &mockFileInfo{name: name}, nil
}
return nil, os.ErrNotExist
}
func (m *mockFS) MkdirAll(path string, perm os.FileMode) error { return nil }
func (m *mockFS) CreateTemp(dir, pattern string) (*os.File, error) { return nil, nil }
func (m *mockFS) MkdirTemp(dir, pattern string) (string, error) { return "", nil }
func (m *mockFS) Remove(name string) error { return nil }
func (m *mockFS) ReadFile(name string) ([]byte, error) {
if data, ok := m.files[name]; ok {
return data, nil
}
return nil, os.ErrNotExist
}
func (m *mockFS) Open(name string) (*os.File, error) {
if m.canOpen[name] {
f, _ := os.CreateTemp("", "mock-file")
return f, nil
}
return nil, os.ErrPermission
}
func TestCheckSystemRequirements(t *testing.T) {
tests := []struct {
name string
files map[string][]byte
canOpen map[string]bool
wantErr bool
}{
{
name: "all requirements met",
files: map[string][]byte{
"/dev/net/tun": {},
},
canOpen: map[string]bool{
"/dev/net/tun": true,
},
wantErr: false,
},
{
name: "tun device missing",
files: map[string][]byte{},
canOpen: map[string]bool{},
wantErr: true,
},
{
name: "tun device not accessible",
files: map[string][]byte{
"/dev/net/tun": {},
},
canOpen: map[string]bool{
"/dev/net/tun": false,
},
wantErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
fs := &mockFS{files: tt.files, canOpen: tt.canOpen}
p := NewPreflight(fs)
err := p.CheckSystemRequirements()
if (err != nil) != tt.wantErr {
t.Errorf("CheckSystemRequirements() error = %v, wantErr %v", err, tt.wantErr)
}
})
}
}
func TestRunHealthCheck(t *testing.T) {
tests := []struct {
name string
files map[string][]byte
canOpen map[string]bool
uid int
username string
wantPass map[string]bool
}{
{
name: "healthy non-root user on Debian",
files: map[string][]byte{
"/dev/net/tun": {},
"/proc/sys/kernel/unprivileged_userns_clone": []byte("1"),
"/proc/sys/user/max_user_namespaces": []byte("1024"),
"/etc/subuid": []byte("james:100000:60000"),
},
canOpen: map[string]bool{
"/dev/net/tun": true,
},
uid: 1000,
username: "james",
wantPass: map[string]bool{
"TUN Device Accessibility": true,
"Unprivileged User Namespaces (Debian/Ubuntu)": true,
"User Namespace Limit": true,
"SubUID/SubGID Mappings": true,
},
},
{
name: "healthy root user",
files: map[string][]byte{
"/dev/net/tun": {},
},
canOpen: map[string]bool{
"/dev/net/tun": true,
},
uid: 0,
username: "root",
wantPass: map[string]bool{
"TUN Device Accessibility": true,
"SubUID/SubGID Mappings": true, // Should be bypassed
},
},
{
name: "broken config",
files: map[string][]byte{
"/dev/net/tun": {},
"/proc/sys/kernel/unprivileged_userns_clone": []byte("0"),
"/proc/sys/user/max_user_namespaces": []byte("0"),
"/etc/subuid": []byte("someone-else:100000:60000"),
},
canOpen: map[string]bool{
"/dev/net/tun": true,
},
uid: 1000,
username: "james",
wantPass: map[string]bool{
"TUN Device Accessibility": true,
"Unprivileged User Namespaces (Debian/Ubuntu)": false,
"User Namespace Limit": false,
"SubUID/SubGID Mappings": false,
},
},
{
name: "non-debian healthy",
files: map[string][]byte{
"/dev/net/tun": {},
"/proc/sys/user/max_user_namespaces": []byte("1024"),
"/etc/subuid": []byte("james:100000:60000"),
},
canOpen: map[string]bool{
"/dev/net/tun": true,
},
uid: 1000,
username: "james",
wantPass: map[string]bool{
"TUN Device Accessibility": true,
"Unprivileged User Namespaces (Debian/Ubuntu)": true, // Not applicable is considered passed
"User Namespace Limit": true,
"SubUID/SubGID Mappings": true,
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
fs := &mockFS{files: tt.files, canOpen: tt.canOpen}
p := NewPreflight(fs)
results := p.RunHealthCheck(tt.uid, tt.username)
for _, res := range results {
if pass, ok := tt.wantPass[res.Name]; ok {
if res.Passed != pass {
t.Errorf("Requirement %s: passed = %v, want %v (Msg: %s)", res.Name, res.Passed, pass, res.Message)
}
}
}
})
}
}
|
