mesh-sdk/go/process/call_test.go

package process

import (
	"context"
	"encoding/json"
	"strings"
	"testing"
	"time"

	"github.com/nats-io/nats.go"

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

// 1191/AC3: given a module tool key <module>.<tool>, when called, then the subject is
// mesh.mod.<module>.call.<tool>.<token> with the same fallback (mesh.mod.<module>.tool.<tool>).
func TestCallSubjectsForAModuleTool(t *testing.T) {
	called, fallback, err := callSubjects("mesh-mail.send", "novox~mesh-mail~send")
	if err != nil {
		t.Fatal(err)
	}
	if called != "mesh.mod.mesh-mail.call.send.novox~mesh-mail~send" {
		t.Errorf("called: %q", called)
	}
	if fallback != "mesh.mod.mesh-mail.tool.send" {
		t.Errorf("fallback: %q", fallback)
	}
}

// 1191/AC1's subject (the seat form): seat:<seat>.<verb> calls mesh.seat.<seat>.call.<verb>.<token>,
// falling back to mesh.seat.<seat>.tool.<verb>.
func TestCallSubjectsForASeatVerb(t *testing.T) {
	called, fallback, err := callSubjects("seat:operator-channel.tell", "novox~mesh-mail~send")
	if err != nil {
		t.Fatal(err)
	}
	if called != "mesh.seat.operator-channel.call.tell.novox~mesh-mail~send" {
		t.Errorf("called: %q", called)
	}
	if fallback != "mesh.seat.operator-channel.tool.tell" {
		t.Errorf("fallback: %q", fallback)
	}
}

func TestCallSubjectsRefusesAKeyNamingNeither(t *testing.T) {
	for _, key := range []string{"", "nodot", "seat:", "seat:noverb", "."} {
		if _, _, err := callSubjects(key, "token"); err == nil {
			t.Errorf("callSubjects(%q) was accepted", key)
		}
	}
}

// 1470/AC1: key mesh-build-go.fetch, node ace, caller ace.mesh-delivery-builder.
func TestCallSubjectsOnANodeForAModuleTool(t *testing.T) {
	c := &Conn{account: Account{User: "ace.mesh-delivery-builder"}}
	called, fallback, err := callSubjectsOn("mesh-build-go.fetch", "ace", c.callerToken())
	if err != nil {
		t.Fatal(err)
	}
	if called != "mesh.mod.mesh-build-go.call.fetch.ace.ace~mesh-delivery-builder" {
		t.Errorf("called: %q", called)
	}
	if fallback != "mesh.mod.mesh-build-go.tool.fetch.ace" {
		t.Errorf("fallback: %q", fallback)
	}
}

// 1470/AC2: seat:node-files.read on g14.
func TestCallSubjectsOnANodeForASeatVerb(t *testing.T) {
	called, fallback, err := callSubjectsOn("seat:node-files.read", "g14", "tok")
	if err != nil {
		t.Fatal(err)
	}
	if called != "mesh.seat.node-files.call.read.g14.tok" || fallback != "mesh.seat.node-files.tool.read.g14" {
		t.Errorf("called %q, fallback %q", called, fallback)
	}
	// Issue 774 notes 84-87: the machine named in the key after '@' is the same subject, never a token holding '@'.
	called, fallback, err = callSubjects("seat:node-files.read@g14", "tok")
	if err != nil || called != "mesh.seat.node-files.call.read.g14.tok" || fallback != "mesh.seat.node-files.tool.read.g14" {
		t.Errorf("@g14: called %q, fallback %q, %v", called, fallback, err)
	}
	if _, _, err := callSubjectsOn("seat:node-files.read@ace", "g14", "tok"); err == nil {
		t.Error("a key naming ace was asked of g14")
	}
}

// 1470/AC3: a node that is not one token is refused before anything is published (the Conn has no
// connection, so only the name check can answer with this error).
func TestCallOnRefusesANodeThatIsNotOneToken(t *testing.T) {
	c := &Conn{}
	for _, node := range []string{"", "a.b", "*", ">", "a b", "a\tb", "a@b"} {
		if _, err := c.CallOn(node, "mesh-build-go.fetch", nil); err == nil || !strings.Contains(err.Error(), "not a node name") {
			t.Errorf("CallOn(%q) = %v, want the refusal of the name", node, err)
		}
	}
	// Issue 774 notes 84-87: Call refuses a malformed key the same way, before anything is published.
	for _, key := range []string{"seat:node-service-manager.stop@novox-be.lan", "seat:a.b@x@y", "seat:a.*", "a.b@"} {
		if _, err := c.Call(key, nil); err == nil {
			t.Errorf("Call(%q) was published", key)
		}
	}
}

// The review of 2026-10-30 (issue 774): a callee's own answer is delivered, whatever its words, and is never asked
// again during a blackout; only the transport's no responders is.
func TestACallIsAskedAgainOnlyWhenItReachedNoOne(t *testing.T) {
	t.Cleanup(busretry.Waits(10*time.Second, time.Millisecond, 2*time.Millisecond))
	for _, row := range []struct {
		name   string
		answer []error // per ask; the last repeats
		asks   int
		kept   bool // CallKept (novox/hq ADR 0668; issue 1966)
	}{
		{"a callee answers jetstream not enabled: asked once", []error{answered("jetstream not enabled")}, 1, false},
		{"a callee answers no responders in its words: asked once", []error{answered("nats: no responders available for request")}, 1, false},
		{"no responders on either subject, then an answer", []error{nats.ErrNoResponders, nats.ErrNoResponders, nil}, 3, false},
		{"a timeout may have been delivered: Call asks once", []error{context.DeadlineExceeded, nil}, 1, false},
		{"kept: no responders on a bus that answers (a callee restarting), then an answer", []error{nats.ErrNoResponders, nats.ErrNoResponders, nil}, 3, true},
		{"kept: a timeout, then an answer", []error{context.DeadlineExceeded, nil}, 2, true},
		{"kept: a callee's answer is asked once", []error{answered("nats: timeout")}, 1, true},
	} {
		asks := 0
		request := func(string, []byte) (json.RawMessage, error) {
			e := row.answer[min(asks, len(row.answer)-1)]
			asks++
			return json.RawMessage(`{}`), e
		}
		var err error
		if row.kept {
			_, err = callKeptWith(request, "called", "fallback", nil)
		} else {
			_, err = callWith(request, func() bool { return true }, "called", "fallback", nil)
		}
		if asks != row.asks {
			t.Errorf("%s: asked %d times (%v), want %d", row.name, asks, err, row.asks)
		}
	}
}

// A-107: AnswerSeat reads the caller from a call's last token (dots written `~`), "" for anything that is not a
// bus user's name; and it refuses what it cannot serve before subscribing.
func TestUserOfTokenAndAnswerSeatRefusals(t *testing.T) {
	for token, want := range map[string]string{"novox~mesh-delivery-builder": "novox.mesh-delivery-builder", "person~jo": "person.jo",
		"plain": "plain", "": "", "a b": "", "a*": "", "~": ""} {
		if got := userOfToken(token); got != want {
			t.Errorf("userOfToken(%q) = %q, want %q", token, got, want)
		}
	}
	c := &Conn{}
	ok := func(string, json.RawMessage) (any, error) { return nil, nil }
	for name, verbs := range map[string]map[string]SeatHandler{"none": nil, "nil handler": {"v": nil}, "bad verb": {"a b": ok}, "wildcard": {"*": ok}} {
		if _, err := c.AnswerSeat("seat", verbs); err == nil {
			t.Errorf("AnswerSeat accepted %s", name)
		}
	}
}