WeKnora deployment source with the reviewed wiki identity, summary and recovery fixes

internal/models/requestbudget/graph_test.go

@@ -0,0 +1,98 @@
+package requestbudget
+
+import (
+	"context"
+	"errors"
+	"net/http"
+	"net/http/httptest"
+	"sync/atomic"
+	"testing"
+	"time"
+)
+
+func TestGraphExecutionRefusesFourthSendAndScopeChanges(t *testing.T) {
+	for _, mismatch := range []string{"limit", "model", "phase"} {
+		t.Run(mismatch, func(t *testing.T) {
+			ctx, guard, cancel, err := BindGraphExecution(context.Background(), "spent-receipt", "model")
+			if err != nil {
+				t.Fatal(err)
+			}
+			defer cancel()
+			ctx = WithModel(ctx, "model")
+			if mismatch == "model" {
+				ctx = WithModel(ctx, "changed")
+			}
+			if mismatch == "phase" {
+				ctx = WithPhase(ctx, "changed")
+			}
+			sends := 0
+			transport := Transport{Base: roundTripFunc(func(*http.Request) (*http.Response, error) {
+				sends++
+				return nil, errors.New("provider failure")
+			})}
+			for i := 0; i < 4; i++ {
+				req, _ := http.NewRequestWithContext(ctx, http.MethodPost, "http://local.test", nil)
+				_, _ = transport.RoundTrip(req)
+			}
+			want := 0
+			if mismatch == "limit" {
+				want = 3
+			}
+			if sends != want || guard.Reservations() != want || !errors.Is(guard.Check(ctx), ErrStopped) {
+				t.Fatalf("sends=%d reserved=%d stop=%v", sends, guard.Reservations(), guard.Check(ctx))
+			}
+		})
+	}
+}
+
+func TestGraphExecutionCancelsBlockedHTTPAtInheritedDeadline(t *testing.T) {
+	var sends atomic.Int32
+	arrived := make(chan struct{})
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		sends.Add(1)
+		close(arrived)
+		<-r.Context().Done()
+	}))
+	defer server.Close()
+	parent, parentCancel := context.WithTimeout(context.Background(), 300*time.Millisecond)
+	defer parentCancel()
+	ctx, guard, cancel, err := BindGraphExecution(parent, "spent-receipt", "model")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer cancel()
+	wantDeadline, _ := parent.Deadline()
+	if deadline, _ := ctx.Deadline(); !deadline.Equal(wantDeadline) {
+		t.Fatal("deadline was replenished")
+	}
+	req, _ := http.NewRequestWithContext(WithModel(ctx, "model"), http.MethodGet, server.URL, nil)
+	started := time.Now()
+	_, err = (&http.Client{Transport: Transport{}}).Do(req)
+	if !errors.Is(err, context.DeadlineExceeded) || time.Since(started) > 2*time.Second {
+		t.Fatalf("blocked send did not cancel at deadline: %v", err)
+	}
+	select {
+	case <-arrived:
+	default:
+		t.Fatal("request never reached local server")
+	}
+	if sends.Load() != 1 || guard.Reservations() != 1 {
+		t.Fatal("blocked send was not counted")
+	}
+}
+
+func TestGraphExecutionLastAllowedResponseRemainsUsable(t *testing.T) {
+	ctx, guard, cancel, err := BindGraphExecution(context.Background(), "spent-receipt", "model")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer cancel()
+	for i := 0; i < GraphMaxSends; i++ {
+		if err := guard.Reserve(ctx, "model", GraphPhase); err != nil {
+			t.Fatal(err)
+		}
+	}
+	if err := guard.Check(ctx); err != nil {
+		t.Fatalf("third valid response rejected: %v", err)
+	}
+}