mesh-controller/cmd/mesh-controller/take_preview_test.go

package main

import (
	"strings"
	"testing"

	"github.com/novox/mesh-controller/internal/catalogue"
	"github.com/novox/mesh-controller/internal/inventory"
)

// What the forge's take compares, as a machine would report it.
func aForgeComparison() comparison {
	return comparison{reported: inventory.Adoption{
		Firewall: "ufw",
		Held: []inventory.Held{
			{ID: "forge.server", Module: "forge", Kind: "container", Target: "forge", Facts: map[string]any{
				"image": "forge:1.27.3", "image_created": "2026-09-17T10:00:00Z",
				"declared_image": "forge:1.22.6", "declared_image_created": "2026-08-20T10:00:00Z", "downgrade": true,
				"networks": map[string]any{"predecessor_default": []any{"office", "db"}},
				"ports":    []any{"3000/tcp>0.0.0.0:3000"}, "declared_ports": []any{"3000:3000"},
			}},
			{ID: "forge.config", Module: "forge", Kind: "file", Target: "/etc/forge/app.ini", Kept: "/var/lib/mesh/kept/app.ini",
				Facts: map[string]any{"differs": true, "difference": []any{"- private scope: local", "+ upstream: public"}}},
			{ID: "other.server", Module: "other", Kind: "container", Target: "other"},
		},
		Reachable: []inventory.Reach{
			{Protocol: "tcp", Address: "0.0.0.0", Port: 3000, By: "forge", Published: true, ContainerPort: 3000},
			{Protocol: "tcp", Address: "0.0.0.0", Port: 22, By: "sshd"},
		},
	}}
}

// A take is a comparison (novox/hq ADR 0163): the preview puts what runs beside what the module
// declares, and an older image or a differing file refuses unless named.
func TestATakePreviewsTheComparisonAndRefusesWhatIsNotNamed(t *testing.T) {
	c := aForgeComparison()
	preview, refusals, saw := comparisonOf("forge", c, takeOptions{})
	for _, want := range []string{"runs forge:1.27.3 (made 2026-09-17)", "declares forge:1.22.6 (made 2026-08-20)", "DOWNGRADE",
		"on the network predecessor_default with office, db", "will not once it moves to the module's own network",
		"publishes 3000/tcp>0.0.0.0:3000; the module declares 3000:3000",
		// How far the port reaches now, as the machine reported it (rule 1).
		"reachable now at 0.0.0.0:3000 (tcp, container port 3000), behind the found firewall (ufw)",
		"- private scope: local", "original kept at /var/lib/mesh/kept/app.ini"} {
		if !strings.Contains(preview, want) {
			t.Errorf("the preview lacks %q:\n%s", want, preview)
		}
	}
	if strings.Contains(preview, "other") {
		t.Errorf("another module's held things are in the preview:\n%s", preview)
	}
	if len(refusals) != 2 || !strings.Contains(refusals[0], "--downgrade") || !strings.Contains(refusals[1], "--replace /etc/forge/app.ini") {
		t.Fatalf("the downgrade and the differing file refuse, each naming its override: %v", refusals)
	}
	if len(saw) != 12 {
		t.Fatalf("the preview's digest is %q", saw)
	}
	// Named, they pass.
	if _, refusals, _ := comparisonOf("forge", c, takeOptions{Downgrade: true, Replace: map[string]bool{"/etc/forge/app.ini": true}}); len(refusals) != 0 {
		t.Fatalf("named differences still refused: %v", refusals)
	}
	if _, refusals, _ := comparisonOf("forge", c, takeOptions{Downgrade: true, Replace: map[string]bool{"*": true}}); len(refusals) != 0 {
		t.Fatalf("replace * did not cover the file: %v", refusals)
	}
	// A held thing with no facts yet — a host older than this — refuses nothing and says what it can.
	if preview, refusals, _ := comparisonOf("other", c, takeOptions{}); len(refusals) != 0 || !strings.Contains(preview, "container other") {
		t.Fatalf("a factless hold: %q %v", preview, refusals)
	}
	// The digest is of what the preview says: a fact changing changes it.
	c.reported.Held[0].Facts["image"] = "forge:1.27.4"
	if _, _, again := comparisonOf("forge", c, takeOptions{}); again == saw {
		t.Fatal("the found image changed and the digest did not")
	}
}

// A secret the mesh minted for a service whose data was found refuses: the running service already
// has a value (rule 2). Accepted, it is carried in; `--mint` says the service shall take the new one.
func TestAMintedSecretForFoundDataRefusesUnlessAcceptedOrMinted(t *testing.T) {
	c := aForgeComparison()
	c.secrets = []inventory.SecretState{
		{Name: "admin", Origin: inventory.OriginMade},
		{Name: "postgres-database", Origin: inventory.OriginMade, Provider: "anchor"},
		{Name: "broker", Origin: inventory.OriginAccepted},
	}
	preview, refusals, _ := comparisonOf("forge", c, takeOptions{Downgrade: true, Replace: map[string]bool{"*": true}})
	for _, want := range []string{
		"own secret admin: MINTED by the mesh and not accepted",
		"secret from anchor postgres-database: MINTED by the mesh and not accepted",
		"own secret broker: accepted from a person, carried in as it is",
	} {
		if !strings.Contains(preview, want) {
			t.Errorf("the preview lacks %q:\n%s", want, preview)
		}
	}
	if len(refusals) != 2 {
		t.Fatalf("two minted secrets refuse: %v", refusals)
	}
	if !strings.Contains(refusals[0], "`secret accept <node> forge admin`") || !strings.Contains(refusals[0], "`--mint admin`") {
		t.Errorf("the own secret's refusal names accepting it and minting it: %s", refusals[0])
	}
	if !strings.Contains(refusals[1], "`secret accept <node> forge postgres-database --provider anchor`") {
		t.Errorf("the required secret's refusal names its provider: %s", refusals[1])
	}
	preview, refusals, _ = comparisonOf("forge", c, takeOptions{Downgrade: true, Replace: map[string]bool{"*": true},
		Mint: map[string]bool{"admin": true, "postgres-database": true}})
	if len(refusals) != 0 || !strings.Contains(preview, "admin: minted by the mesh; the service takes the new value, as --mint said") {
		t.Fatalf("--mint did not pass the minted secrets: %v\n%s", refusals, preview)
	}
	// With no found data — only a file held — the service has no value of its own, and a minted
	// secret is simply said.
	c.reported.Held = c.reported.Held[1:2]
	if _, refusals, _ := comparisonOf("forge", c, takeOptions{Replace: map[string]bool{"*": true}}); len(refusals) != 0 {
		t.Fatalf("a minted secret refused with no data found: %v", refusals)
	}
}

// A found network a per-machine setting keeps is named in the preview (rule 4), and the module's
// settings are said with where each came from, composed or not (rules 1 and 6).
func TestTheKeptNetworkAndTheSettingsAreInThePreview(t *testing.T) {
	c := aForgeComparison()
	c.keeps = map[string][]string{"forge.server": {"predecessor_default"}}
	c.layers = []catalogue.Layer{
		{From: catalogue.MeshWideLayer, Values: map[string]any{"site": "x"}},
		{From: "anchor", Values: map[string]any{catalogue.NetworksSetting: map[string]any{"server": []any{"predecessor_default"}}}},
	}
	preview, _, _ := comparisonOf("forge", c, takeOptions{Downgrade: true, Replace: map[string]bool{"*": true}})
	for _, want := range []string{
		"on the network predecessor_default with office, db — kept by this machine's setting, so they still reach it by name once taken",
		"settings from the mesh: site",
		"settings from anchor: networks",
	} {
		if !strings.Contains(preview, want) {
			t.Errorf("the preview lacks %q:\n%s", want, preview)
		}
	}
	if strings.Contains(preview, "will not once it moves") {
		t.Errorf("a kept network is still said to be lost:\n%s", preview)
	}
	c.settingsRefused = "forge: ports is a { port: machine-port } map"
	preview, _, _ = comparisonOf("forge", c, takeOptions{Downgrade: true, Replace: map[string]bool{"*": true}})
	if !strings.Contains(preview, "SETTINGS DO NOT COMPOSE with the module's definition, so the push leaves it out: forge: ports") {
		t.Errorf("settings that cannot compose are not said:\n%s", preview)
	}
}