jschoubben
d68e241724
ADR 0593 §7: the composer with its refusals leaves mesh-sdk, so mesh-sdk carries no composition rule. The catalogue functions only the node-engine's composition reaches (Resolve, Resolution's Compose, Declaration, DataItems, LeftOut, Rules and the rest, the settings, placeholder and template refusals, the rendering helpers) are copied with their tests into internal/compose/resolution; a method of a mesh-sdk shape becomes a function taking it first. The composition calls its own copies, and the captured catalogue its tests read lives here now, shared by mesh-compose's tests. Claude-Session: https://claude.ai/code/session_01NcbgfJ9Gum47zkFKWRaovL
50 lines
2.0 KiB
Go
50 lines
2.0 KiB
Go
package resolution
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import (
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"strings"
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"testing"
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mcat "git.novox.be/novox/mesh-sdk/go/catalogue"
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)
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// The mesh's bus is one per mesh, read from the catalogue beside this checkout.
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//
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// **This is step 2's claim, and it is checked here rather than in a bed** (novox/hq ADR 0116):
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// adoption puts the NATS server into the `mesh-broker` seat on a mesh that is already running,
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// and the property that matters is that a second one anywhere is refused *when it is assigned*,
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// not discovered later as two servers holding different halves of the mesh's traffic. A second
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// bus is not a degraded mesh; it is two meshes that both believe they are the one.
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func TestASecondMeshBusAnywhereIsRefusedByName(t *testing.T) {
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nats := catalogueManifest(t, "nats")
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if _, err := Resolve(shelf(nats), []string{"nats"}, workstation(), mcat.World{}); err != nil {
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t.Fatalf("the bus alone does not resolve: %v", err)
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}
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elsewhere := mcat.World{Held: []mcat.Held{{Claim: "mesh-broker", Scope: mcat.ScopeMesh,
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Node: "anchor", Module: "nats"}}}
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other := workstation()
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other.Name = "laptop"
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_, err := Resolve(shelf(nats), []string{"nats"}, other, elsewhere)
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if err == nil {
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t.Fatal("a second bus was accepted on another machine")
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}
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if !strings.Contains(err.Error(), "mesh-broker") || !strings.Contains(err.Error(), "one per mesh") {
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t.Fatalf("refused without naming the seat: %v", err)
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}
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}
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// The seat is the server's role, not the product's name (novox/hq ADR 0079). A different
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// implementation of the bus claims the same seat, and the mesh refuses it for the same reason —
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// which is the property that lets the bus be replaced at all.
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func TestTheSeatRefusesADifferentBusToo(t *testing.T) {
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nats := catalogueManifest(t, "nats")
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held := mcat.World{Held: []mcat.Held{{Claim: "mesh-broker", Scope: mcat.ScopeMesh,
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Node: "anchor", Module: "some-other-broker"}}}
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other := workstation()
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other.Name = "laptop"
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if _, err := Resolve(shelf(nats), []string{"nats"}, other, held); err == nil {
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t.Fatal("the seat admitted a second holder because the module's name differed")
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}
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}
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