snapshot of https://github.com/casbin/casbin.git (master, 2026-09-15; blobs > 131072B omitted)

watcher_test.go

@@ -0,0 +1,94 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+package casbin
+
+import "testing"
+
+type SampleWatcher struct {
+	callback func(string)
+}
+
+func (w *SampleWatcher) Close() {
+}
+
+func (w *SampleWatcher) SetUpdateCallback(callback func(string)) error {
+	w.callback = callback
+	return nil
+}
+
+func (w *SampleWatcher) Update() error {
+	if w.callback != nil {
+		w.callback("")
+	}
+	return nil
+}
+
+func TestSetWatcher(t *testing.T) {
+	e, err := NewEnforcer("examples/rbac_model.conf", "examples/rbac_policy.csv")
+	if err != nil {
+		t.Fatal(err)
+	}
+	sampleWatcher := &SampleWatcher{}
+	err = e.SetWatcher(sampleWatcher)
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = e.SavePolicy() // calls watcher.Update()
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestSelfModify(t *testing.T) {
+	e, err := NewEnforcer("examples/rbac_model.conf", "examples/rbac_policy.csv")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	sampleWatcher := &SampleWatcher{}
+	err = e.SetWatcher(sampleWatcher)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var called int
+
+	called = -1
+	_ = e.watcher.SetUpdateCallback(func(s string) {
+		called = 1
+	})
+	_, err = e.AddPolicy("eva", "data", "read") // calls watcher.Update()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if called != 1 {
+		t.Fatal("callback should be called")
+	}
+
+	called = -1
+	_ = e.watcher.SetUpdateCallback(func(s string) {
+		called = 1
+	})
+	_, err = e.SelfAddPolicy("p", "p", []string{"eva", "data", "write"}) // calls watcher.Update()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if called != -1 {
+		t.Fatal("callback should not be called")
+	}
+}