package steprun

import (
	"errors"
	"testing"

	"git.novox.be/novox/mesh-sdk/go/buscalls"
)

type fakeOutputs struct{ m map[string][]byte }

func (f fakeOutputs) Put(name string, data []byte, _ string) (buscalls.ObjectInfo, error) {
	f.m[name] = data
	return buscalls.ObjectInfo{}, nil
}
func (f fakeOutputs) Get(name string) (buscalls.ObjectData, error) {
	d, ok := f.m[name]
	if !ok {
		return buscalls.ObjectData{}, errors.New("object not found")
	}
	return buscalls.ObjectData{Data: d}, nil
}

// Design 47 G A-254: what a holder keeps through KeepOutputIn it reads again through ReadOutputFrom; with no store both refuse by name.
func TestOutputsKeptAreRead(t *testing.T) {
	st := fakeOutputs{m: map[string][]byte{}}
	if err := KeepOutputIn(st)("output.a1", []byte("x")); err != nil {
		t.Fatal(err)
	}
	if got, err := ReadOutputFrom(st)("output.a1"); err != nil || string(got) != "x" {
		t.Fatalf("read %q, %v", got, err)
	}
	if _, err := ReadOutputFrom(st)("output.none"); err == nil {
		t.Fatal("an absent answer was read")
	}
	if KeepOutputIn(nil)("o", nil) == nil {
		t.Fatal("no store kept an answer")
	}
	if _, err := ReadOutputFrom(nil)("o"); err == nil {
		t.Fatal("no store read an answer")
	}
}