AUTH-2587 add config watcher and reload logic for access client forwarder

watcher/file_test.go

@@ -0,0 +1,54 @@
+package watcher
+
+import (
+	"bufio"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+type mockNotifier struct {
+	eventPath string
+}
+
+func (n *mockNotifier) WatcherItemDidChange(path string) {
+	n.eventPath = path
+}
+
+func (n *mockNotifier) WatcherDidError(err error) {
+}
+
+func TestFileChanged(t *testing.T) {
+	filePath := "test_file"
+	f, err := os.Create(filePath)
+	assert.NoError(t, err)
+	defer func() {
+		f.Close()
+		os.Remove(filePath)
+	}()
+
+	service, err := NewFile()
+	assert.NoError(t, err)
+
+	err = service.Add(filePath)
+	assert.NoError(t, err)
+
+	n := &mockNotifier{}
+	go service.Start(n)
+
+	f.Sync()
+
+	w := bufio.NewWriter(f)
+	_, err = w.WriteString("hello Austin, do you like my file watcher?\n")
+	assert.NoError(t, err)
+	err = w.Flush()
+	assert.NoError(t, err)
+
+	// give it time to trigger
+	time.Sleep(10 * time.Millisecond)
+	service.Shutdown()
+
+	assert.Equal(t, filePath, n.eventPath, "notifier didn't get an new file write event")
+}