cache_test.go

Documentation: google.golang.org/api/idtoken

     1  // Copyright 2020 Google LLC.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package idtoken
     6  
     7  import (
     8  	"net/http"
     9  	"sync"
    10  	"testing"
    11  	"time"
    12  )
    13  
    14  type fakeClock struct {
    15  	mu sync.Mutex
    16  	t  time.Time
    17  }
    18  
    19  func (c *fakeClock) Now() time.Time {
    20  	c.mu.Lock()
    21  	defer c.mu.Unlock()
    22  	return c.t
    23  }
    24  
    25  func (c *fakeClock) Sleep(d time.Duration) {
    26  	c.mu.Lock()
    27  	defer c.mu.Unlock()
    28  	c.t = c.t.Add(d)
    29  }
    30  
    31  func TestCacheHit(t *testing.T) {
    32  	clock := &fakeClock{t: time.Now()}
    33  	dummyResp := &certResponse{
    34  		Keys: []jwk{
    35  			{
    36  				Kid: "123",
    37  			},
    38  		},
    39  	}
    40  	cache := newCachingClient(nil)
    41  	cache.clock = clock.Now
    42  
    43  	// Cache should be empty
    44  	cert, ok := cache.get(googleSACertsURL)
    45  	if ok || cert != nil {
    46  		t.Fatal("cache for SA certs should be empty")
    47  	}
    48  
    49  	// Add an item, but make it expire now
    50  	cache.set(googleSACertsURL, dummyResp, make(http.Header))
    51  	clock.Sleep(time.Nanosecond) // it expires when current time is > expiration, not >=
    52  	cert, ok = cache.get(googleSACertsURL)
    53  	if ok || cert != nil {
    54  		t.Fatal("cache for SA certs should be expired")
    55  	}
    56  
    57  	// Add an item that expires in 1 seconds
    58  	h := make(http.Header)
    59  	h.Set("age", "0")
    60  	h.Set("cache-control", "public, max-age=1, must-revalidate, no-transform")
    61  	cache.set(googleSACertsURL, dummyResp, h)
    62  	cert, ok = cache.get(googleSACertsURL)
    63  	if !ok || cert == nil || cert.Keys[0].Kid != "123" {
    64  		t.Fatal("cache for SA certs have a resp")
    65  	}
    66  	// Wait
    67  	clock.Sleep(2 * time.Second)
    68  	cert, ok = cache.get(googleSACertsURL)
    69  	if ok || cert != nil {
    70  		t.Fatal("cache for SA certs should be expired")
    71  	}
    72  }
    73
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