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Copy pathinteger.go
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473 lines (434 loc) · 16.3 KB
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package conformance
import (
"context"
"encoding/json"
"fmt"
"sync"
"testing"
"time"
"github.com/operatorstack/boatstack/boatstack/kernel"
)
// IntegerDomain is the reference non-software domain.
type IntegerDomain struct {
mu sync.Mutex
value int
executions map[string]int
interruptNextIncrement bool
panicNextIncrement bool
}
func (d *IntegerDomain) Observe(context.Context, string) (kernel.Observation, error) {
d.mu.Lock()
defer d.mu.Unlock()
return kernel.NewObservation(struct {
Value int `json:"value"`
}{d.value})
}
func (d *IntegerDomain) Admissible(_ context.Context, evaluation kernel.Evaluation) (bool, string, error) {
var observed struct {
Value int `json:"value"`
}
if err := json.Unmarshal(evaluation.Observation.Value, &observed); err != nil {
return false, "", err
}
switch evaluation.Transition.Operation {
case "objective.bind":
return evaluation.State.ObjectiveBinding == nil && evaluation.Objective != nil, "objective is not yet bound", nil
case "counter.increment":
return evaluation.Objective != nil && observed.Value < 2, "exact objective is present and value is below target", nil
case "counter.reset":
return observed.Value > 0 || evaluation.State.Recovery != nil, "value is nonzero or recovery remains active", nil
default:
return false, "unknown transition", nil
}
}
func (d *IntegerDomain) Verify(_ context.Context, evaluation kernel.Evaluation, _ kernel.Effect, target kernel.Observation) error {
var before, after struct {
Value int `json:"value"`
}
if err := json.Unmarshal(evaluation.Observation.Value, &before); err != nil {
return err
}
if err := json.Unmarshal(target.Value, &after); err != nil {
return err
}
switch evaluation.Transition.Operation {
case "objective.bind":
if before.Value != after.Value {
return fmt.Errorf("objective binding changed domain state")
}
case "counter.increment":
if after.Value != before.Value+1 {
return fmt.Errorf("increment postcondition failed")
}
case "counter.reset":
if after.Value != 0 {
return fmt.Errorf("reset postcondition failed")
}
}
return nil
}
func (d *IntegerDomain) changeObservation() {
d.mu.Lock()
defer d.mu.Unlock()
d.value++
}
func (d *IntegerDomain) interruptNext() {
d.mu.Lock()
defer d.mu.Unlock()
d.interruptNextIncrement = true
}
func (d *IntegerDomain) panicNext() {
d.mu.Lock()
defer d.mu.Unlock()
d.panicNextIncrement = true
}
func (d *IntegerDomain) effectCounts() map[string]int {
d.mu.Lock()
defer d.mu.Unlock()
copy := make(map[string]int, len(d.executions))
for transition, count := range d.executions {
copy[transition] = count
}
return copy
}
// IntegerOperator applies the reference domain operations.
type IntegerOperator struct{ Domain *IntegerDomain }
func (o IntegerOperator) Execute(_ context.Context, operation kernel.Operation) (kernel.Effect, error) {
o.Domain.mu.Lock()
defer o.Domain.mu.Unlock()
o.Domain.executions[operation.Transition.ID]++
switch operation.Transition.Operation {
case "objective.bind":
case "counter.increment":
o.Domain.value++
if o.Domain.interruptNextIncrement {
o.Domain.interruptNextIncrement = false
return kernel.Effect{}, fmt.Errorf("simulated interrupted operator")
}
if o.Domain.panicNextIncrement {
o.Domain.panicNextIncrement = false
panic("simulated process panic")
}
case "counter.reset":
o.Domain.value = 0
default:
return kernel.Effect{}, fmt.Errorf("unknown operation")
}
facet := "counter.value"
if operation.Transition.Operation == "objective.bind" {
facet = "supervisor.objective"
}
return kernel.Effect{Facts: []kernel.EffectFact{{Facet: facet, Operation: operation.Transition.Operation, Fingerprint: fmt.Sprintf("value-%d", o.Domain.value)}}}, nil
}
// IntegerCapabilities classifies the reference operations.
type IntegerCapabilities struct{}
func (IntegerCapabilities) RequiredCapabilities(transition kernel.Transition) ([]kernel.Capability, error) {
switch transition.Operation {
case "objective.bind":
return []kernel.Capability{"objective.bind"}, nil
case "counter.increment":
return []kernel.Capability{"counter.increment"}, nil
case "counter.reset":
return []kernel.Capability{"counter.reset"}, nil
default:
return nil, fmt.Errorf("unclassified operation %q", transition.Operation)
}
}
// MemoryReceipts records committed receipts for the reference store.
type MemoryReceipts struct {
mu sync.Mutex
values []kernel.Receipt
}
func (r *MemoryReceipts) append(receipt kernel.Receipt) {
r.mu.Lock()
defer r.mu.Unlock()
r.values = append(r.values, receipt)
}
func (r *MemoryReceipts) snapshot() []kernel.Receipt {
r.mu.Lock()
defer r.mu.Unlock()
return append([]kernel.Receipt(nil), r.values...)
}
// MemoryStateStore is a revision-CAS reference Store.
type MemoryStateStore struct {
mu sync.Mutex
state kernel.ControlState
receipts *MemoryReceipts
commitFailures int
commitCount int
}
func (s *MemoryStateStore) Load(context.Context, string) (kernel.ControlState, error) {
s.mu.Lock()
defer s.mu.Unlock()
return cloneState(s.state), nil
}
func (s *MemoryStateStore) BeginEffect(_ context.Context, revision uint64, target kernel.ControlState) error {
s.mu.Lock()
defer s.mu.Unlock()
if s.state.Revision != revision {
return fmt.Errorf("stale revision")
}
s.state = cloneState(target)
return nil
}
func (s *MemoryStateStore) CommitTransition(_ context.Context, revision uint64, target kernel.ControlState, receipt kernel.Receipt) error {
s.mu.Lock()
defer s.mu.Unlock()
if s.commitFailures > 0 {
s.commitFailures--
return fmt.Errorf("simulated atomic transaction failure")
}
if s.state.Revision != revision {
return fmt.Errorf("stale revision")
}
s.state = cloneState(target)
s.commitCount++
s.receipts.append(receipt)
return nil
}
func (s *MemoryStateStore) snapshot() (kernel.ControlState, int) {
s.mu.Lock()
defer s.mu.Unlock()
return cloneState(s.state), s.commitCount
}
func (s *MemoryStateStore) failNextCommit() {
s.mu.Lock()
defer s.mu.Unlock()
s.commitFailures++
}
func (s *MemoryStateStore) retarget(instanceID string) {
s.mu.Lock()
defer s.mu.Unlock()
s.state.InstanceID = instanceID
}
func (s *MemoryStateStore) bumpRevision() {
s.mu.Lock()
defer s.mu.Unlock()
s.state.Revision++
}
func (s *MemoryStateStore) retargetProgram(program kernel.ProgramIdentity) {
s.mu.Lock()
defer s.mu.Unlock()
s.state.Program = program
}
func (s *MemoryStateStore) rebind(objective kernel.Objective) {
s.mu.Lock()
defer s.mu.Unlock()
binding, err := kernel.BindObjective(objective)
if err != nil {
panic(err)
}
s.state.ObjectiveBinding = &binding
}
// MemoryLocker serializes one control instance.
type MemoryLocker struct{ mu sync.Mutex }
func (l *MemoryLocker) Acquire(context.Context, string) (kernel.Lock, error) {
l.mu.Lock()
return memoryLock{mu: &l.mu}, nil
}
type memoryLock struct{ mu *sync.Mutex }
func (l memoryLock) Unlock() error {
l.mu.Unlock()
return nil
}
// FixedClock returns one deterministic, test-controlled time.
type FixedClock struct {
mu sync.Mutex
Time time.Time
}
func (c *FixedClock) Now() time.Time {
c.mu.Lock()
defer c.mu.Unlock()
return c.Time
}
func (c *FixedClock) advance(duration time.Duration) {
c.mu.Lock()
defer c.mu.Unlock()
c.Time = c.Time.Add(duration)
}
// IntegerProgram compiles the reference control program.
func IntegerProgram() (kernel.Program, error) {
return kernel.CompileProgram("integer-control", "1.0.0", "kernel-v1", "unbound", []string{"two"}, []kernel.Transition{
{ID: "objective.bind", SourceModes: []string{"unbound"}, TargetMode: "zero", ObjectiveScope: kernel.ObjectiveNone, ObjectiveMutation: kernel.BindObjectiveMutation, RequiredCapabilities: []kernel.Capability{"objective.bind"}, OwnedFacets: []string{"supervisor.objective"}, Operation: "objective.bind", Priority: 5},
{ID: "counter.increment-first", SourceModes: []string{"zero"}, TargetMode: "one", ObjectiveScope: kernel.ObjectiveBoundExact, ObjectiveMutation: kernel.PreserveObjective, RequiredCapabilities: []kernel.Capability{"counter.increment"}, OwnedFacets: []string{"counter.value"}, Operation: "counter.increment", Priority: 10},
{ID: "counter.increment-second", SourceModes: []string{"one"}, TargetMode: "two", ObjectiveScope: kernel.ObjectiveBoundExact, ObjectiveMutation: kernel.PreserveObjective, RequiredCapabilities: []kernel.Capability{"counter.increment"}, OwnedFacets: []string{"counter.value"}, Operation: "counter.increment", Priority: 10},
{ID: "counter.reset", SourceModes: []string{"one", "two"}, TargetMode: "zero", ObjectiveScope: kernel.ObjectiveOptionalPreserve, ObjectiveMutation: kernel.PreserveObjective, RequiredCapabilities: []kernel.Capability{"counter.reset"}, OwnedFacets: []string{"counter.value"}, Operation: "counter.reset", Priority: 20},
{ID: "objective.recover", SourceModes: []string{"unbound"}, TargetMode: "unbound", ObjectiveScope: kernel.ObjectiveOptionalPreserve, ObjectiveMutation: kernel.PreserveObjective, RequiredCapabilities: []kernel.Capability{"counter.reset"}, OwnedFacets: []string{"counter.value"}, Operation: "counter.reset", Priority: 1, Recovers: []string{"objective.bind"}},
{ID: "counter.recover", SourceModes: []string{"zero", "one", "two"}, TargetMode: "zero", ObjectiveScope: kernel.ObjectiveOptionalPreserve, ObjectiveMutation: kernel.PreserveObjective, RequiredCapabilities: []kernel.Capability{"counter.reset"}, OwnedFacets: []string{"counter.value"}, Operation: "counter.reset", Priority: 1, Recovers: []string{"counter.increment-first", "counter.increment-second", "counter.reset"}},
})
}
// IntegerFixture returns the reusable reference conformance suite.
func IntegerFixture() KernelConformance {
return newIntegerFixture(SetupUnbound)
}
func newIntegerFixture(setup Setup) KernelConformance {
if !setup.valid() {
panic(invalidSetup(setup))
}
program, err := IntegerProgram()
if err != nil {
panic(err)
}
objective, err := kernel.NewObjective("reach-two", 1, map[string]int{"value": 2})
if err != nil {
panic(err)
}
revised, err := kernel.NewObjective("reach-two", 2, map[string]int{"value": 3})
if err != nil {
panic(err)
}
conflicting, err := kernel.NewObjective("other", 1, map[string]int{"value": 0})
if err != nil {
panic(err)
}
alternateTransitions := append([]kernel.Transition(nil), program.Transitions...)
for index := range alternateTransitions {
if alternateTransitions[index].ID == "counter.increment-first" {
alternateTransitions[index].TargetMode = "two"
}
}
alternateProgram, err := kernel.CompileProgram(program.ID, program.Version, program.RuntimeCompatibility, program.InitialMode, program.MarkedModes, alternateTransitions)
if err != nil {
panic(err)
}
state := kernel.ControlState{InstanceID: "counter-fixture", Program: program.Identity(), Mode: "unbound", Revision: 1}
value := 0
switch setup {
case SetupConcurrentSameBase:
binding, bindErr := kernel.BindObjective(objective)
if bindErr != nil {
panic(bindErr)
}
state.Mode, state.ObjectiveBinding = "zero", &binding
case SetupMaintenanceAbsent:
state.Mode, value = "one", 1
case SetupMaintenanceBound:
binding, bindErr := kernel.BindObjective(objective)
if bindErr != nil {
panic(bindErr)
}
state.Mode, state.ObjectiveBinding, value = "one", &binding, 1
}
now := time.Date(2026, 8, 12, 10, 0, 0, 0, time.UTC)
authority := kernel.Authority{Receipts: []kernel.AuthorityReceipt{{ID: "human-counter", Subject: "fixture", Fingerprint: "fixture-authority", Capabilities: []kernel.Capability{"counter.audit", "counter.increment", "counter.reset", "objective.bind"}, IssuedAt: now.Add(-time.Minute), ExpiresAt: now.Add(24 * time.Hour)}}}
domain := &IntegerDomain{value: value, executions: map[string]int{}}
receipts := &MemoryReceipts{}
store := &MemoryStateStore{state: state, receipts: receipts}
clock := &FixedClock{Time: now}
fixture := KernelConformance{
Domain: domain,
Operator: IntegerOperator{Domain: domain},
CapabilityClassifier: IntegerCapabilities{},
Store: store,
Locker: &MemoryLocker{},
Clock: clock,
Program: program,
}
fixture.Scenario = Scenario{
InstanceID: state.InstanceID,
Objective: objective,
RevisedObjective: revised,
ConflictingObjective: conflicting,
AlternateProgram: alternateProgram,
Authority: authority,
BindTransition: "objective.bind",
AdvanceTransitions: []string{"counter.increment-first", "counter.increment-second"},
MaintenanceTransition: "counter.reset",
RecoveryTransition: "counter.recover",
RecoveryCapability: "counter.reset",
ExtraCapability: "counter.audit",
ChangeObservation: domain.changeObservation,
RebindObjective: store.rebind,
BumpStateRevision: store.bumpRevision,
RetargetProgram: store.retargetProgram,
AdvanceClock: clock.advance,
IndependentLocker: func() kernel.Locker { return &MemoryLocker{} },
VerifyCommitted: func(before, after Snapshot, receipt kernel.Receipt) error {
return verifyIntegerCommitted(program, before, after, receipt)
},
InterruptNextOperator: domain.interruptNext,
PanicNextOperator: domain.panicNext,
FailNextCommit: store.failNextCommit,
RetargetInstance: store.retarget,
Snapshot: func() Snapshot {
current, commits := store.snapshot()
observation, observeErr := domain.Observe(context.Background(), current.InstanceID)
if observeErr != nil {
panic(observeErr)
}
return Snapshot{State: current, Observation: observation, Effects: domain.effectCounts(), Receipts: receipts.snapshot(), CommitCount: commits}
},
}
fixture.New = func(_ testing.TB, requested Setup) KernelConformance {
return newIntegerFixture(requested)
}
if setup == SetupBound {
runtime, runtimeErr := kernel.NewRuntime(program, fixture.Domain, fixture.Operator, fixture.CapabilityClassifier, fixture.Store, fixture.Locker, fixture.Clock)
if runtimeErr != nil {
panic(runtimeErr)
}
for _, transition := range []string{fixture.Scenario.BindTransition, fixture.Scenario.AdvanceTransitions[0], fixture.Scenario.MaintenanceTransition} {
request := kernel.ResolveRequest{InstanceID: state.InstanceID, Objective: &objective, Authority: authority, Requested: transition}
resolution, resolveErr := runtime.Resolve(context.Background(), request)
if resolveErr != nil || resolution.Prescription == nil {
panic(fmt.Sprintf("seed bound fixture %s: decision=%#v error=%v", transition, resolution.Decision, resolveErr))
}
if _, applyErr := runtime.Apply(context.Background(), kernel.ApplyRequest{ResolveRequest: request, Prescription: *resolution.Prescription}); applyErr != nil {
panic(applyErr)
}
}
}
return fixture
}
func verifyIntegerCommitted(program kernel.Program, before, after Snapshot, receipt kernel.Receipt) error {
var prior, result struct {
Value int `json:"value"`
}
if err := json.Unmarshal(before.Observation.Value, &prior); err != nil {
return err
}
if err := json.Unmarshal(after.Observation.Value, &result); err != nil {
return err
}
transition, ok := program.Transition(receipt.TransitionID)
if !ok {
return fmt.Errorf("unknown transition %q", receipt.TransitionID)
}
facet := "counter.value"
if transition.Operation == "objective.bind" {
facet = "supervisor.objective"
}
expectedFact := kernel.EffectFact{Facet: facet, Operation: transition.Operation, Fingerprint: fmt.Sprintf("value-%d", result.Value)}
if len(receipt.Effects) != 1 || receipt.Effects[0] != expectedFact {
return fmt.Errorf("receipt effect facts %#v differ from independent evidence %#v", receipt.Effects, expectedFact)
}
switch transition.Operation {
case "objective.bind":
if result.Value != prior.Value {
return fmt.Errorf("objective binding changed value from %d to %d", prior.Value, result.Value)
}
case "counter.increment":
if result.Value != prior.Value+1 {
return fmt.Errorf("increment changed value from %d to %d", prior.Value, result.Value)
}
case "counter.reset":
if result.Value != 0 {
return fmt.Errorf("reset left value at %d", result.Value)
}
default:
return fmt.Errorf("unsupported operation %q", transition.Operation)
}
return nil
}
func cloneState(state kernel.ControlState) kernel.ControlState {
copy := state
if state.ObjectiveBinding != nil {
binding := *state.ObjectiveBinding
copy.ObjectiveBinding = &binding
}
if state.Recovery != nil {
recovery := *state.Recovery
copy.Recovery = &recovery
}
return copy
}