Function TestPanicweb

stack/context_test.go:2045–2105

TestPanicweb implements the parsing of panicweb output. panicweb is a separate binary from the rest of panic because importing the "net" package causes a background thread to be started, which breaks "panic asleep".

(t *testing.T)

// "net" package causes a background thread to be started, which breaks "panic
// asleep".
func TestPanicweb(t *testing.T) {
	t.Parallel()
	if runtime.GOARCH == "ppc64" || runtime.GOARCH == "ppc64le" {
		t.Skip("https://github.com/maruel/panicparse/issues/66")
	}
	prefix := bytes.Buffer{}
	s, suffix, err := ScanSnapshot(bytes.NewReader(internaltest.PanicwebOutput()), &prefix, defaultOpts())
	if err != io.EOF {
		t.Fatal(err)
	}
	if s == nil {
		t.Fatal("snapshot is nil")
	}
	compareString(t, "panic: Here's a snapshot of a normal web server.\n\n", prefix.String())
	compareString(t, "", string(suffix))
	if s.RemoteGOROOT != "" {
		t.Fatalf("unexpected RemoteGOROOT: %q", s.RemoteGOROOT)
	}
	if !s.guessPaths() {
		t.Error("expected success")
	}
	if s.RemoteGOROOT != strings.Replace(runtime.GOROOT(), "\\", "/", -1) {
		t.Fatalf("RemoteGOROOT mismatch; want:%q got:%q", runtime.GOROOT(), s.RemoteGOROOT)
	}
	if got := len(s.Goroutines); got < 30 {
		t.Fatalf("unexpected Goroutines; want at least 30, got %d", got)
	}
	// The goal here is not to find the exact match since it'll change across
	// OSes and Go versions, but to find some of the expected signatures.
	pwebDir := pathJoin(getPanicParseDir(t), "cmd", "panicweb")
	// Reduce the goroutines and categorize the signatures.
	var types []panicwebSignatureType
	for _, b := range s.Aggregate(AnyPointer).Buckets {
		types = append(types, identifyPanicwebSignature(t, b, pwebDir))
	}
	// Count the expected types.
	if v := pstCount(types, pstUnknown); v != 0 {
		t.Fatalf("found %d unknown signatures", v)
	}
	if v := pstCount(types, pstMain); v != 1 {
		t.Fatalf("found %d pstMain signatures", v)
	}
	if v := pstCount(types, pstURL1handler); v != 1 && v != 2 {
		t.Fatalf("found %d URL1Handler signatures", v)
	}
	if v := pstCount(types, pstURL2handler); v != 1 && v != 2 {
		t.Fatalf("found %d URL2Handler signatures", v)
	}
	if v := pstCount(types, pstClient); v == 0 {
		t.Fatalf("found %d client signatures", v)
	}
	if v := pstCount(types, pstServe); v != 1 {
		t.Fatalf("found %d serve signatures", v)
	}
	if v := pstCount(types, pstColorable); v != 1 {
		t.Fatalf("found %d colorable signatures", v)
	}
	if v := pstCount(types, pstStdlib); v < 3 {