test: entitlement stubs, sync task progress, middleware

4 tests: nil Core allows all, SyncTask progress 0→0.5→1.0,
middleware passthrough, zero-remote-height edge case.

Follows TestFilename_Function_{Good,Bad,Ugly} convention.

Co-Authored-By: Charon <charon@lethean.io>

entitlement_test.go

@@ -0,0 +1,71 @@
+// Copyright (c) 2017-2026 Lethean (https://lt.hn)
+//
+// Licensed under the European Union Public Licence (EUPL) version 1.2.
+// SPDX-License-Identifier: EUPL-1.2
+
+package blockchain
+
+import (
+	"context"
+	"testing"
+
+	"dappco.re/go/core"
+)
+
+func TestEntitlement_CheckEntitlement_Good_NilCore(t *testing.T) {
+	// nil Core = standalone mode, always allowed
+	if !CheckEntitlement(nil, "blockchain.getinfo") {
+		t.Error("nil Core should allow all actions")
+	}
+}
+
+func TestEntitlement_SyncTask_Good(t *testing.T) {
+	task := NewSyncTask()
+
+	if task.IsRunning() {
+		t.Error("new task should not be running")
+	}
+	if task.IsDone() {
+		t.Error("new task should not be done")
+	}
+	if task.Progress() != 0 {
+		t.Errorf("new task progress: got %f, want 0", task.Progress())
+	}
+
+	task.UpdateHeight(5000, 10000)
+	p := task.Progress()
+	if p != 0.5 {
+		t.Errorf("progress at 5000/10000: got %f, want 0.5", p)
+	}
+
+	task.UpdateHeight(10000, 10000)
+	if task.Progress() != 1.0 {
+		t.Errorf("progress at 10000/10000: got %f, want 1.0", task.Progress())
+	}
+}
+
+func TestEntitlement_Middleware_Good(t *testing.T) {
+	called := false
+	handler := func(ctx context.Context, opts core.Options) core.Result {
+		called = true
+		return core.Result{OK: true}
+	}
+
+	wrapped := EntitlementMiddleware(nil, handler)
+	result := wrapped(context.Background(), core.Options{})
+
+	if !called {
+		t.Error("handler was not called")
+	}
+	if !result.OK {
+		t.Error("result should be OK")
+	}
+}
+
+func TestEntitlement_SyncTask_Ugly_ZeroRemote(t *testing.T) {
+	task := NewSyncTask()
+	task.UpdateHeight(100, 0)
+	if task.Progress() != 0 {
+		t.Error("zero remote height should return 0 progress")
+	}
+}