jschoubben
769dcf16e3
A seat's event kept apart from its family (the node-engine seat's running, kept last per subject; mesh-delivery's owed, a stream with an age and a cap) had no helper: EventHub binds only the shared events stream, and dev-G-engine and dev-G-forge each met it. process.SeatStreamName is the bus's name of a contract's Stream<E> (SEAT_<seat>_<event>), one rule for its maker and its hearers; Account.SeatEventConsumerConfig the module's durable as the maker makes it (last per subject where the event is kept so); Account.HearSeatEvents binds and pulls it, making nothing. Builds: design 47 G §260, §24, §39, §146, §153, §199 Claude-Session: https://claude.ai/code/session_01JG73KEq4zoDfM9WtYpcQgZ
53 lines
2.0 KiB
Go
53 lines
2.0 KiB
Go
package process
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import (
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"testing"
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"github.com/nats-io/nats.go/jetstream"
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)
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func TestTheHubMatchesSubjectsAndRefusesOverlappingPatterns(t *testing.T) {
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for _, c := range []struct {
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a, b string
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match, overlap bool
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}{
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{"mesh.mod.*.event.views.*", "mesh.mod.o.event.views.x", true, true},
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{"mesh.mod.p.event.>", "mesh.mod.p.event", false, false},
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{"mesh.mod.p.event.a", "mesh.mod.q.event.a", false, false},
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{"mesh.mod.p.event.>", "mesh.mod.*.event.a", false, true},
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{"mesh.mod.p.event.a", "mesh.mod.p.event.a.b", false, false},
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} {
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if got := subjectMatches(c.a, c.b); got != c.match && c.match {
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t.Errorf("%s should match %s", c.a, c.b)
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}
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if got := subjectsOverlap(c.a, c.b); got != c.overlap {
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t.Errorf("overlap(%s, %s) = %v", c.a, c.b, got)
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}
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}
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h := NewEventHub(nil)
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nop := func(jetstream.Msg) {}
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if err := h.Handle("mesh.mod.p.event.>", nop); err != nil {
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t.Fatal(err)
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}
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if err := h.Handle("mesh.mod.*.event.a", nop); err == nil {
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t.Fatal("an overlapping pattern was accepted")
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}
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if err := h.Handle("mesh.mod.q.event.>", nop); err != nil {
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t.Fatal(err)
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}
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// W1.12: a seat's event kept in a stream of its own is heard on one bus name and one durable, the maker's and the
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// hearer's alike; an event kept last per subject is delivered from the last of each subject.
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a := Account{Node: "ace", Module: "mesh-grants"}
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if got := SeatStreamName("node-engine.running"); got != "SEAT_node-engine_running" {
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t.Errorf("the bus's name of node-engine.running is %q", got)
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}
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cfg := a.SeatEventConsumerConfig([]string{"mesh.seat.node-engine.event.running.>"}, true)
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if cfg.Durable != "ace_mesh-grants" || cfg.DeliverPolicy != jetstream.DeliverLastPerSubjectPolicy ||
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cfg.AckPolicy != jetstream.AckExplicitPolicy || len(cfg.FilterSubjects) != 1 {
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t.Errorf("the durable on a stream kept last per subject: %+v", cfg)
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}
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if cfg := a.SeatEventConsumerConfig(nil, false); cfg.DeliverPolicy != jetstream.DeliverAllPolicy {
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t.Errorf("the durable on a stream kept with an age starts from its first message, got %v", cfg.DeliverPolicy)
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}
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}
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