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|
package internal
import (
"bytes"
"errors"
"os"
"testing"
bpf "github.com/aquasecurity/libbpfgo"
)
func TestSetupBPFModuleErrorWrapsStage(t *testing.T) {
cause := errors.New("boom")
err := setupBPFModuleError("load object", cause)
if err == nil {
t.Fatalf("expected wrapped error")
}
if got, want := err.Error(), "setup BPF module: load object: boom"; got != want {
t.Fatalf("wrapped error = %q, want %q", got, want)
}
if !errors.Is(err, cause) {
t.Fatalf("expected wrapped error to retain original cause")
}
}
func TestSetupBPFModuleErrorNil(t *testing.T) {
if err := setupBPFModuleError("attach probes", nil); err != nil {
t.Fatalf("expected nil error passthrough, got %v", err)
}
}
func TestLoadBPFModuleUsesEmbeddedObjectByDefault(t *testing.T) {
origFile := newBPFModuleFromFile
origBuffer := newBPFModuleFromBuffer
origOverride, hadOverride := os.LookupEnv(bpfObjectOverrideEnv)
t.Cleanup(func() {
newBPFModuleFromFile = origFile
newBPFModuleFromBuffer = origBuffer
if hadOverride {
os.Setenv(bpfObjectOverrideEnv, origOverride)
return
}
os.Unsetenv(bpfObjectOverrideEnv)
})
os.Unsetenv(bpfObjectOverrideEnv)
wantErr := errors.New("buffer load failed")
newBPFModuleFromFile = func(string) (*bpf.Module, error) {
t.Fatal("expected embedded loader, not file loader")
return nil, nil
}
var gotBytes []byte
var gotName string
newBPFModuleFromBuffer = func(data []byte, name string) (*bpf.Module, error) {
gotBytes = append([]byte(nil), data...)
gotName = name
return nil, wantErr
}
module, stage, err := loadBPFModule()
if module != nil {
t.Fatalf("expected nil module from stubbed loader, got %v", module)
}
if got, want := stage, "load embedded module"; got != want {
t.Fatalf("stage = %q, want %q", got, want)
}
if !errors.Is(err, wantErr) {
t.Fatalf("expected embedded loader error, got %v", err)
}
if !bytes.Equal(gotBytes, embeddedBPFObject) {
t.Fatalf("embedded loader received unexpected object bytes")
}
if got, want := gotName, embeddedBPFObjectName; got != want {
t.Fatalf("embedded loader name = %q, want %q", got, want)
}
}
func TestLoadBPFModuleUsesOverridePathWhenConfigured(t *testing.T) {
origFile := newBPFModuleFromFile
origBuffer := newBPFModuleFromBuffer
origOverride, hadOverride := os.LookupEnv(bpfObjectOverrideEnv)
t.Cleanup(func() {
newBPFModuleFromFile = origFile
newBPFModuleFromBuffer = origBuffer
if hadOverride {
os.Setenv(bpfObjectOverrideEnv, origOverride)
return
}
os.Unsetenv(bpfObjectOverrideEnv)
})
overridePath := "/tmp/custom-ior.bpf.o"
if err := os.Setenv(bpfObjectOverrideEnv, overridePath); err != nil {
t.Fatalf("set override env: %v", err)
}
wantErr := errors.New("file load failed")
newBPFModuleFromBuffer = func([]byte, string) (*bpf.Module, error) {
t.Fatal("expected file loader, not embedded loader")
return nil, nil
}
var gotPath string
newBPFModuleFromFile = func(path string) (*bpf.Module, error) {
gotPath = path
return nil, wantErr
}
module, stage, err := loadBPFModule()
if module != nil {
t.Fatalf("expected nil module from stubbed loader, got %v", module)
}
if got, want := stage, "load module from override file"; got != want {
t.Fatalf("stage = %q, want %q", got, want)
}
if !errors.Is(err, wantErr) {
t.Fatalf("expected override loader error, got %v", err)
}
if got, want := gotPath, overridePath; got != want {
t.Fatalf("override path = %q, want %q", got, want)
}
}
|
