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|
package probemanager
import (
"errors"
"testing"
)
type fakeLink struct {
destroyed int
err error
}
func (l *fakeLink) Destroy() error {
l.destroyed++
return l.err
}
type fakeProgram struct {
tracepoint string
link *fakeLink
err error
}
func (p *fakeProgram) AttachTracepoint(_, name string) (Link, error) {
p.tracepoint = name
if p.err != nil {
return nil, p.err
}
if p.link == nil {
p.link = &fakeLink{}
}
return p.link, nil
}
type fakeAttacher struct {
programs map[string]*fakeProgram
errs map[string]error
}
func (a *fakeAttacher) GetProgram(name string) (Program, error) {
if err, ok := a.errs[name]; ok {
return nil, err
}
p, ok := a.programs[name]
if !ok {
return nil, errors.New("missing program")
}
return p, nil
}
func TestManagerAttachAllToggleAndCounts(t *testing.T) {
attacher := &fakeAttacher{
programs: map[string]*fakeProgram{
"handle_sys_enter_read": {},
"handle_sys_exit_read": {},
"handle_sys_enter_write": {},
"handle_sys_exit_write": {},
},
errs: map[string]error{},
}
mgr := NewManager(attacher)
err := mgr.AttachAll(func(tp string) bool { return tp == "sys_enter_read" || tp == "sys_exit_read" }, []string{
"sys_enter_read", "sys_exit_read", "sys_enter_write", "sys_exit_write",
})
if err != nil {
t.Fatalf("AttachAll returned error: %v", err)
}
active, total := mgr.ActiveCount()
if active != 1 || total != 2 {
t.Fatalf("unexpected counts active=%d total=%d", active, total)
}
states := mgr.States()
if len(states) != 2 {
t.Fatalf("expected 2 states, got %d", len(states))
}
if states[0].Syscall != "read" || !states[0].Active {
t.Fatalf("expected read active first, got %+v", states[0])
}
if states[1].Syscall != "write" || states[1].Active {
t.Fatalf("expected write inactive second, got %+v", states[1])
}
if err := mgr.Toggle("write"); err != nil {
t.Fatalf("Toggle(write) returned error: %v", err)
}
active, total = mgr.ActiveCount()
if active != 2 || total != 2 {
t.Fatalf("unexpected counts after toggle active=%d total=%d", active, total)
}
}
func TestManagerDetachDestroysLinks(t *testing.T) {
enter := &fakeLink{}
exit := &fakeLink{}
attacher := &fakeAttacher{
programs: map[string]*fakeProgram{
"handle_sys_enter_close": {link: enter},
"handle_sys_exit_close": {link: exit},
},
errs: map[string]error{},
}
mgr := NewManager(attacher)
if err := mgr.AttachAll(nil, []string{"sys_enter_close", "sys_exit_close"}); err != nil {
t.Fatalf("AttachAll returned error: %v", err)
}
if err := mgr.Detach("close"); err != nil {
t.Fatalf("Detach returned error: %v", err)
}
if enter.destroyed != 1 || exit.destroyed != 1 {
t.Fatalf("expected both links destroyed once, got enter=%d exit=%d", enter.destroyed, exit.destroyed)
}
}
func TestManagerDetachFailureKeepsActiveStateForUndetachedLink(t *testing.T) {
enter := &fakeLink{err: errors.New("destroy failed")}
exit := &fakeLink{}
attacher := &fakeAttacher{
programs: map[string]*fakeProgram{
"handle_sys_enter_close": {link: enter},
"handle_sys_exit_close": {link: exit},
},
errs: map[string]error{},
}
mgr := NewManager(attacher)
if err := mgr.AttachAll(nil, []string{"sys_enter_close", "sys_exit_close"}); err != nil {
t.Fatalf("AttachAll returned error: %v", err)
}
err := mgr.Detach("close")
if err == nil {
t.Fatalf("expected detach error")
}
states := mgr.States()
if len(states) != 1 {
t.Fatalf("expected one state, got %+v", states)
}
if !states[0].Active {
t.Fatalf("expected probe to remain active when one link failed to detach")
}
if states[0].Error == "" {
t.Fatalf("expected error to be recorded after detach failure")
}
}
func TestManagerClosePreventsFurtherOperations(t *testing.T) {
attacher := &fakeAttacher{
programs: map[string]*fakeProgram{
"handle_sys_enter_open": {},
"handle_sys_exit_open": {},
},
errs: map[string]error{},
}
mgr := NewManager(attacher)
if err := mgr.AttachAll(nil, []string{"sys_enter_open", "sys_exit_open"}); err != nil {
t.Fatalf("AttachAll returned error: %v", err)
}
if err := mgr.Close(); err != nil {
t.Fatalf("Close returned error: %v", err)
}
if err := mgr.Toggle("open"); err == nil {
t.Fatalf("expected Toggle to fail after Close")
}
}
func TestManagerAttachAllReturnsProgramError(t *testing.T) {
attacher := &fakeAttacher{
programs: map[string]*fakeProgram{},
errs: map[string]error{
"handle_sys_enter_read": errors.New("boom"),
},
}
mgr := NewManager(attacher)
err := mgr.AttachAll(nil, []string{"sys_enter_read", "sys_exit_read"})
if err == nil {
t.Fatalf("expected attach error")
}
states := mgr.States()
if len(states) != 1 || states[0].Error == "" {
t.Fatalf("expected state to capture attach error, got %+v", states)
}
}
func TestManagerAttachAllPicksUpNewTracepointsOnLaterCall(t *testing.T) {
attacher := &fakeAttacher{
programs: map[string]*fakeProgram{
"handle_sys_enter_read": {},
"handle_sys_exit_read": {},
"handle_sys_enter_write": {},
"handle_sys_exit_write": {},
},
errs: map[string]error{},
}
mgr := NewManager(attacher)
if err := mgr.AttachAll(nil, []string{"sys_enter_read", "sys_exit_read"}); err != nil {
t.Fatalf("AttachAll(read) returned error: %v", err)
}
states := mgr.States()
if len(states) != 1 || states[0].Syscall != "read" {
t.Fatalf("expected only read after first call, got %+v", states)
}
if err := mgr.AttachAll(nil, []string{"sys_enter_read", "sys_exit_read", "sys_enter_write", "sys_exit_write"}); err != nil {
t.Fatalf("AttachAll(read+write) returned error: %v", err)
}
states = mgr.States()
if len(states) != 2 {
t.Fatalf("expected new syscall to appear after second call, got %+v", states)
}
if states[0].Syscall != "read" || states[1].Syscall != "write" {
t.Fatalf("unexpected syscall ordering/content: %+v", states)
}
}
func TestManagerIsActiveReflectsCurrentState(t *testing.T) {
attacher := &fakeAttacher{
programs: map[string]*fakeProgram{
"handle_sys_enter_read": {},
"handle_sys_exit_read": {},
},
errs: map[string]error{},
}
mgr := NewManager(attacher)
if err := mgr.AttachAll(nil, []string{"sys_enter_read", "sys_exit_read"}); err != nil {
t.Fatalf("AttachAll returned error: %v", err)
}
if !mgr.IsActive("read") {
t.Fatalf("expected read to be active")
}
if err := mgr.Detach("read"); err != nil {
t.Fatalf("Detach returned error: %v", err)
}
if mgr.IsActive("read") {
t.Fatalf("expected read to be inactive after detach")
}
if mgr.IsActive("does_not_exist") {
t.Fatalf("expected unknown syscall to be inactive")
}
}
|
