Say a waiting provider in the operator's words, and which state it is when a consumer is held (issue 405 review)

cmd/mesh-controller/module_health.go

@@ -239,9 +239,14 @@ func judgeModuleHealth(ctx context.Context, inv *inventory.Inventory, k *conditi
 		}
 		o := moduleUnhealthyObservation(m, node, unhealthy[m])
 		if hold != nil {
-			if p, held := hold.heldUnder(node, m, unhealthy[m]); held {
-				// Held under the provider's condition: nothing of its own, and the provider's says it waits.
-				heldOn[o.Key()] = p.Module + " on " + p.Node
+			if by, held := hold.heldWith(node, m, unhealthy[m]); held {
+				// Held under the provider's condition: nothing of its own, and the provider's says it waits. The
+				// clearing line says which the provider is: unhealthy, or waiting for the operator (issue 405).
+				p := by.provider
+				heldOn[o.Key()] = p.Module + " on " + p.Node + ", which is unhealthy"
+				if len(by.waits) > 0 {
+					heldOn[o.Key()] = p.Module + " on " + p.Node + ", which waits for you"
+				}
 				providers[p] = true
 				continue
 			}
@@ -249,8 +254,8 @@ func judgeModuleHealth(ctx context.Context, inv *inventory.Inventory, k *conditi
 			// A provider that waits for the operator for a part this finding cannot be matched to does not hold it
 			// (novox/hq issue 405): raised as its own, and saying the provider waits, so neither is hidden.
 			if p, waiting := hold.waitingUncovered(node, m, unhealthy[m]); waiting {
-				o.Said += fmt.Sprintf("; its provider %s on %s waits for the operator, for a part not known to be "+
-					"the one %s needs, so this is said as its own", p.Module, p.Node, m)
+				o.Said += fmt.Sprintf("; %s on %s waits for you, but not for anything %s is known to need, so %s's "+
+					"fault is said on its own", p.Module, p.Node, m, m)
 			}
 		}
 		seen[o.Key()] = true
@@ -282,7 +287,7 @@ func judgeModuleHealth(ctx context.Context, inv *inventory.Inventory, k *conditi
 			why = fmt.Sprintf("%s says %s no longer waits for the operator", node, module)
 		}
 		if on, held := heldOn[key]; held {
-			why = fmt.Sprintf("what %s finds on %s waits on %s, which is unhealthy or waits for the operator: held under its condition", module, node, on)
+			why = fmt.Sprintf("what %s finds on %s waits on %s: held under its condition", module, node, on)
 		}
 		// **A condition that became the other kind** is not "working again" (issue 318 review): its clearing
 		// line says what it became.

cmd/mesh-controller/waiting_provider_test.go

@@ -216,7 +216,7 @@ func TestAConsumerOfAnotherPartIsRaisedOnItsOwn(t *testing.T) {
 	if consumer == nil || conditionOf(open, needsOperatorKey("db", "anchor")) == nil {
 		t.Fatalf("raised %v; want shop's own unhealthy beside db's needs-operator", openKeysOf(open))
 	}
-	if said := consumer.Evidence[0].Said; !strings.Contains(said, "its provider db on anchor waits for the operator") {
+	if said := consumer.Evidence[0].Said; !strings.Contains(said, "db on anchor waits for you, but not for anything shop is known to need, so shop's fault is said on its own") {
 		t.Fatalf("the consumer's condition does not say its provider waits: %s", said)
 	}
 }
@@ -326,3 +326,50 @@ func openKeysOf(cs []conditions.Condition) []string {
 	}
 	return out
 }
+
+// A consumer raised on its own, whose provider then waits for the operator for the part it needs, is cleared saying
+// which the provider is: it waits for you, not that it is unhealthy (novox/hq issue 405 review).
+func TestAConsumerHeldOnceItsProviderWaitsSaysWhichItIs(t *testing.T) {
+	k, _ := withConditionsInMemory(t)
+	ctx := t.Context()
+	start := time.Now().Add(-time.Second)
+	healthy := waitingDatabase()
+	healthy.State, healthy.Waits = link.StateHealthy, nil
+	healths := shopFailingBeside(healthy)
+	was := readHoldingFor
+	t.Cleanup(func() { readHoldingFor = was })
+	readHoldingFor = func(_ context.Context, _ *inventory.Inventory, open []conditions.Condition) (*holding, error) {
+		return holdingOf(open, healths, shopOnTheDatabase), nil
+	}
+	shop := map[string][]inventory.ResourceHealth{"shop": {failingConsumer("shop")}}
+	for look := 1; look <= 2; look++ {
+		if err := judgeModuleHealth(ctx, nil, k, "laptop", shop, map[string]int{"shop": look}, time.Now()); err != nil {
+			t.Fatal(err)
+		}
+	}
+	if open, _ := k.Open(ctx); conditionOf(open, moduleUnhealthyKey("shop", "laptop")) == nil {
+		t.Fatalf("shop beside a healthy provider is not raised: %v", openKeysOf(open))
+	}
+	healths = shopFailingBeside(waitingDatabase())
+	if err := judgeModuleHealth(ctx, nil, k, "laptop", shop, map[string]int{"shop": 3}, time.Now()); err != nil {
+		t.Fatal(err)
+	}
+	var why string
+	for deadline := time.Now().Add(2 * time.Second); why == "" && time.Now().Before(deadline); {
+		events, err := k.HistorySince(ctx, start)
+		if err != nil {
+			t.Fatal(err)
+		}
+		for _, e := range events {
+			if e.Key == moduleUnhealthyKey("shop", "laptop") && e.Change == conditions.ChangeCleared {
+				why = e.Why
+			}
+		}
+		if why == "" {
+			time.Sleep(10 * time.Millisecond)
+		}
+	}
+	if !strings.Contains(why, "waits on db on anchor, which waits for you") {
+		t.Fatalf("shop's clearing says %q; want it to say db on anchor waits for you", why)
+	}
+}