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|
package internal
import (
"context"
"fmt"
"ior/internal/event"
"ior/internal/types"
"syscall"
"testing"
)
type testData struct {
rawTracepoints [][]byte // All the raw tracepoints sent to the event loop
validates []func(t *testing.T, ev *event.Pair) // Validation functions to be called on the event loop output
}
func TestEventloop(t *testing.T) {
testTable := map[string]testData{
"OpenEventTest1": makeOpenEventTestData1(t),
"OpenEventTest2": makeOpenEventTestData2(t),
}
ctx, cancel := context.WithCancel(context.Background())
inCh := make(chan []byte)
outCh := make(chan *event.Pair)
defer func() {
cancel()
close(inCh)
close(outCh)
}()
ev := newEventLoop()
ev.printCb = func(ev *event.Pair) { outCh <- ev }
go ev.run(ctx, inCh)
for testName, td := range testTable {
t.Run(testName, func(t *testing.T) {
go func() {
for _, raw := range td.rawTracepoints {
t.Log("Sending raw tracepoint", raw, "simulating BPF sending this")
inCh <- raw
}
}()
for _, validate := range td.validates {
ep := <-outCh
t.Log("Received", ep)
validate(t, ep)
}
select {
case x := <-outCh:
t.Errorf("Expected no more events but got '%v'", x)
default:
}
})
}
}
func makeOpenEventTestData1(t *testing.T) (td testData) {
enterEv, enterEvBytes := makeEnterOpenEvent(t)
td.rawTracepoints = append(td.rawTracepoints, enterEvBytes)
_, exitEvBytes := makeExitOpenEvent(t)
td.rawTracepoints = append(td.rawTracepoints, exitEvBytes)
td.validates = append(td.validates, func(t *testing.T, ep *event.Pair) {
if !enterEv.Equals(ep.EnterEv) {
t.Errorf("Expected '%v' but got '%v'", enterEv, ep.EnterEv)
return
}
filenameA := ep.FileName()
filenameB := types.StringValue(enterEv.Filename[:])
if filenameA != filenameB {
t.Errorf("Expected file name '%v' but got '%v'", filenameB, filenameA)
return
}
comm := types.StringValue(enterEv.Comm[:])
if ep.Comm != comm {
t.Errorf("Expected comm name '%v' but got '%v'", comm, ep.Comm)
return
}
t.Log(fmt.Sprintf("Event pair '%v' appears fine", ep))
})
return td
}
func makeOpenEventTestData2(t *testing.T) (td testData) {
// Almost the same, but with duplicates
td1 := makeOpenEventTestData1(t)
td.rawTracepoints = append(td.rawTracepoints, td1.rawTracepoints[1]) // Will be ignored by the event loop
td.rawTracepoints = append(td.rawTracepoints, td1.rawTracepoints[0]) // Will be used by the event loop
td.rawTracepoints = append(td.rawTracepoints, td1.rawTracepoints[0]) // Will be ignored by the event loop
td.rawTracepoints = append(td.rawTracepoints, td1.rawTracepoints[1]) // Will be used by the event loop
td.rawTracepoints = append(td.rawTracepoints, td1.rawTracepoints[1]) // Will be ignored by the event loop
td.validates = td1.validates
return td
}
func makeEnterOpenEvent(t *testing.T) (types.OpenEvent, []byte) {
ev := types.OpenEvent{
EventType: types.ENTER_OPEN_EVENT,
TraceId: types.SYS_ENTER_OPENAT,
Time: 123456789,
Pid: 10,
Tid: 11,
Flags: syscall.O_RDWR,
Filename: [types.MAX_FILENAME_LENGTH]byte{},
Comm: [types.MAX_PROGNAME_LENGTH]byte{},
}
copy(ev.Filename[:], "testfile.txt")
copy(ev.Comm[:], "testcomm")
bytes, err := ev.Bytes()
if err != nil {
t.Error(err)
}
return ev, bytes
}
func makeExitOpenEvent(t *testing.T) (types.RetEvent, []byte) {
ev := types.RetEvent{
EventType: types.EXIT_OPEN_EVENT,
TraceId: types.SYS_EXIT_OPENAT,
Time: 123456789,
Ret: 42,
Pid: 10,
Tid: 11,
}
bytes, err := ev.Bytes()
if err != nil {
t.Error(err)
}
return ev, bytes
}
|
