mesh-config: the whole test waits on the module's views subscriptions, never a second's sleep

Claude-Session: https://claude.ai/code/session_01JG73KJNrH5EgFXMKKYSrig

modules/mesh-config/cmd/mesh-config/whole_integration_test.go

@@ -38,6 +38,7 @@ import (
 	"git.novox.be/novox/mesh-sdk/go/health"
 	"git.novox.be/novox/mesh-sdk/go/process"
 	"git.novox.be/novox/mesh-sdk/go/testbus"
+	"git.novox.be/novox/mesh-sdk/go/views"
 )
 
 type wire struct {
@@ -506,6 +507,22 @@ func (p *player) get(state, key string) ([]byte, bool) {
 	return e.Value(), true
 }
 
+// hearsTheViews waits until the module subscribed to every owner's views family it follows: a change said before that
+// would reach it only as a gap. Waited on, never slept for.
+func (p *player) hearsTheViews() {
+	p.t.Helper()
+	eventually(p.t, "the module subscribed to every views family it follows", func() bool {
+		p.mu.Lock()
+		defer p.mu.Unlock()
+		for _, f := range followed {
+			if !slices.Contains(p.subs, f.Owner+"."+views.EventName(f.State)) {
+				return false
+			}
+		}
+		return true
+	})
+}
+
 // viewsReady waits until every first view of the module is answered (config_first_views).
 func (p *player) viewsReady() {
 	p.t.Helper()
@@ -664,7 +681,7 @@ func TestConfigWholeRenamesAndRetiresAgainstTheBus(t *testing.T) {
 	if _, err := p.call(ResyncTool, nil); err != nil {
 		t.Fatal(err)
 	}
-	time.Sleep(time.Second) // the watches start after the first call
+	p.hearsTheViews()
 	set := func(module, key string, value any) {
 		t.Helper()
 		if _, err := p.call(Seat+"."+Verb, map[string]any{"action": "set", "module": module, "node": "g14", "key": key,
@@ -710,17 +727,15 @@ func TestConfigWholeRenamesAndRetiresAgainstTheBus(t *testing.T) {
 
 	// The module restarted inside the window keeps it, and says renamed no more.
 	said := p.publishedCount(EventRenamed)
-	cancelOld := p.ctx
-	_ = cancelOld
 	p2 := start(t, bin, js, router, haves, nil)
 	p2.viewsReady()
 	if _, err := p2.call(ResyncTool, nil); err != nil {
 		t.Fatal(err)
 	}
-	time.Sleep(time.Second)
-	if v, ok := resolvedValue(p2, "g14", "player", "volume"); !ok || v != "8" {
-		t.Errorf("after the restart the old name answers %q (%v), want 8", v, ok)
-	}
+	eventually(t, "after the restart the old name answers 8", func() bool {
+		v, ok := resolvedValue(p2, "g14", "player", "volume")
+		return ok && v == "8"
+	})
 	if n := p2.publishedCount(EventRenamed); n != 0 || said != 1 {
 		t.Errorf("renamed was said %d times before the restart and %d after", said, n)
 	}