mesh-sdk/go/catalogue/bound_test.go

package catalogue

import (
	"encoding/json"
	"strings"
	"testing"
)

// A consumer of a provision that keeps its data stays bound where its data is (novox/hq ADR 0232,
// issue 273).
//
// The incident, exactly: a machine runs its own store and five consumers of it; the mesh's store seat
// is held by the store on another machine. Issue 258's rule — the seat's holder elsewhere answers
// before this machine's own provider — re-bound all five to the holder, each was made a fresh, empty
// database there, and nothing said so.

func TestAnOfferSaysWhetherItKeepsConsumerData(t *testing.T) {
	var o Offer
	if err := json.Unmarshal([]byte(`{"name":"wildcard-resolution","scope":"mesh","keeps-consumer-data":false}`), &o); err != nil {
		t.Fatal(err)
	}
	if o.KeepsConsumerData == nil || *o.KeepsConsumerData {
		t.Fatalf("read %+v", o)
	}
	out, err := json.Marshal(o)
	if err != nil || !strings.Contains(string(out), `"keeps-consumer-data":false`) {
		t.Fatalf("wrote %s, %v", out, err)
	}
	yes, no := true, false
	granting := Manifest{Module: "g", Provides: []Offer{{Name: "p", Scope: ScopeMesh}}, Grants: map[string]string{"p": "/g"}}
	if !granting.KeepsConsumerData("p") {
		t.Error("a provider granting each consumer a credential keeps what it writes, unsaid")
	}
	if (Manifest{Module: "r", Provides: []Offer{{Name: "p", Scope: ScopeMesh}}}).KeepsConsumerData("p") {
		t.Error("a provider granting nothing keeps nothing, unsaid")
	}
	granting.Provides[0].KeepsConsumerData = &no
	if granting.KeepsConsumerData("p") {
		t.Error("what an offer says, it gets")
	}
	said := Manifest{Module: "s", Provides: []Offer{{Name: "p", Scope: ScopeMesh, KeepsConsumerData: &yes}}}
	if !said.KeepsConsumerData("p") || !KeepsConsumerData(map[string]Manifest{"s": said, "r": {Module: "r",
		Provides: []Offer{{Name: "p", Scope: ScopeMesh, KeepsConsumerData: &no}}}}, "p") {
		t.Error("a name any provider says keeps data keeps data")
	}
}