feat: authsession service

authsession/internal/testkit/projection_publisher.go

@@ -0,0 +1,62 @@
+package testkit
+
+import (
+	"context"
+	"sync"
+
+	"galaxy/authsession/internal/domain/gatewayprojection"
+	"galaxy/authsession/internal/ports"
+)
+
+// RecordingProjectionPublisher is a deterministic
+// GatewaySessionProjectionPublisher double that records every published
+// snapshot.
+type RecordingProjectionPublisher struct {
+	mu sync.Mutex
+
+	// Err is returned directly from PublishSession when set.
+	Err error
+
+	// Errors is an optional FIFO error script consumed before Err. Nil entries
+	// represent successful publish attempts.
+	Errors []error
+
+	published []gatewayprojection.Snapshot
+}
+
+// PublishSession records snapshot and returns the configured error, if any.
+func (p *RecordingProjectionPublisher) PublishSession(ctx context.Context, snapshot gatewayprojection.Snapshot) error {
+	if err := ctx.Err(); err != nil {
+		return err
+	}
+	if err := snapshot.Validate(); err != nil {
+		return err
+	}
+
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	p.published = append(p.published, cloneProjectionSnapshot(snapshot))
+	if len(p.Errors) > 0 {
+		err := p.Errors[0]
+		p.Errors = append([]error(nil), p.Errors[1:]...)
+		return err
+	}
+
+	return p.Err
+}
+
+// PublishedSnapshots returns a stable snapshot of every published projection.
+func (p *RecordingProjectionPublisher) PublishedSnapshots() []gatewayprojection.Snapshot {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	snapshots := make([]gatewayprojection.Snapshot, 0, len(p.published))
+	for _, snapshot := range p.published {
+		snapshots = append(snapshots, cloneProjectionSnapshot(snapshot))
+	}
+
+	return snapshots
+}
+
+var _ ports.GatewaySessionProjectionPublisher = (*RecordingProjectionPublisher)(nil)