text: // Copyright 2016 The Go Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style
  // license that can be found in the LICENSE file.
  
  package autocert
  
  import (
  	"context"
  	"io/ioutil"
  	"os"
  	"path/filepath"
  	"reflect"
  	"testing"
  )
  
  // make sure DirCache satisfies Cache interface
  var _ Cache = DirCache("/")
  
  func TestDirCache(t *testing.T) {
  	dir, err := ioutil.TempDir("", "autocert")
  	if err != nil {
  		t.Fatal(err)
  	}
  	defer os.RemoveAll(dir)
  	dir = filepath.Join(dir, "certs") // a nonexistent dir
  	cache := DirCache(dir)
  	ctx := context.Background()
  
  	// test cache miss
  	if _, err := cache.Get(ctx, "nonexistent"); err != ErrCacheMiss {
  		t.Errorf("get: %v; want ErrCacheMiss", err)
  	}
  
  	// test put/get
  	b1 := []byte{1}
  	if err := cache.Put(ctx, "dummy", b1); err != nil {
  		t.Fatalf("put: %v", err)
  	}
  	b2, err := cache.Get(ctx, "dummy")
  	if err != nil {
  		t.Fatalf("get: %v", err)
  	}
  	if !reflect.DeepEqual(b1, b2) {
  		t.Errorf("b1 = %v; want %v", b1, b2)
  	}
  	name := filepath.Join(dir, "dummy")
  	if _, err := os.Stat(name); err != nil {
  		t.Error(err)
  	}
  
  	// test delete
  	if err := cache.Delete(ctx, "dummy"); err != nil {
  		t.Fatalf("delete: %v", err)
  	}
  	if _, err := cache.Get(ctx, "dummy"); err != ErrCacheMiss {
  		t.Errorf("get: %v; want ErrCacheMiss", err)
  	}
  }
  