mirror of https://github.com/status-im/consul.git
520 lines
14 KiB
Go
520 lines
14 KiB
Go
package cache
|
|
|
|
import (
|
|
"fmt"
|
|
"sort"
|
|
"sync"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/stretchr/testify/mock"
|
|
"github.com/stretchr/testify/require"
|
|
)
|
|
|
|
// Test a basic Get with no indexes (and therefore no blocking queries).
|
|
func TestCacheGet_noIndex(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
require := require.New(t)
|
|
|
|
typ := TestType(t)
|
|
defer typ.AssertExpectations(t)
|
|
c := TestCache(t)
|
|
c.RegisterType("t", typ, nil)
|
|
|
|
// Configure the type
|
|
typ.Static(FetchResult{Value: 42}, nil).Times(1)
|
|
|
|
// Get, should fetch
|
|
req := TestRequest(t, RequestInfo{Key: "hello"})
|
|
result, err := c.Get("t", req)
|
|
require.NoError(err)
|
|
require.Equal(42, result)
|
|
|
|
// Get, should not fetch since we already have a satisfying value
|
|
result, err = c.Get("t", req)
|
|
require.NoError(err)
|
|
require.Equal(42, result)
|
|
|
|
// Sleep a tiny bit just to let maybe some background calls happen
|
|
// then verify that we still only got the one call
|
|
time.Sleep(20 * time.Millisecond)
|
|
typ.AssertExpectations(t)
|
|
}
|
|
|
|
// Test a basic Get with no index and a failed fetch.
|
|
func TestCacheGet_initError(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
require := require.New(t)
|
|
|
|
typ := TestType(t)
|
|
defer typ.AssertExpectations(t)
|
|
c := TestCache(t)
|
|
c.RegisterType("t", typ, nil)
|
|
|
|
// Configure the type
|
|
fetcherr := fmt.Errorf("error")
|
|
typ.Static(FetchResult{}, fetcherr).Times(2)
|
|
|
|
// Get, should fetch
|
|
req := TestRequest(t, RequestInfo{Key: "hello"})
|
|
result, err := c.Get("t", req)
|
|
require.Error(err)
|
|
require.Nil(result)
|
|
|
|
// Get, should fetch again since our last fetch was an error
|
|
result, err = c.Get("t", req)
|
|
require.Error(err)
|
|
require.Nil(result)
|
|
|
|
// Sleep a tiny bit just to let maybe some background calls happen
|
|
// then verify that we still only got the one call
|
|
time.Sleep(20 * time.Millisecond)
|
|
typ.AssertExpectations(t)
|
|
}
|
|
|
|
// Test a Get with a request that returns a blank cache key. This should
|
|
// force a backend request and skip the cache entirely.
|
|
func TestCacheGet_blankCacheKey(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
require := require.New(t)
|
|
|
|
typ := TestType(t)
|
|
defer typ.AssertExpectations(t)
|
|
c := TestCache(t)
|
|
c.RegisterType("t", typ, nil)
|
|
|
|
// Configure the type
|
|
typ.Static(FetchResult{Value: 42}, nil).Times(2)
|
|
|
|
// Get, should fetch
|
|
req := TestRequest(t, RequestInfo{Key: ""})
|
|
result, err := c.Get("t", req)
|
|
require.NoError(err)
|
|
require.Equal(42, result)
|
|
|
|
// Get, should not fetch since we already have a satisfying value
|
|
result, err = c.Get("t", req)
|
|
require.NoError(err)
|
|
require.Equal(42, result)
|
|
|
|
// Sleep a tiny bit just to let maybe some background calls happen
|
|
// then verify that we still only got the one call
|
|
time.Sleep(20 * time.Millisecond)
|
|
typ.AssertExpectations(t)
|
|
}
|
|
|
|
// Test that Get blocks on the initial value
|
|
func TestCacheGet_blockingInitSameKey(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
typ := TestType(t)
|
|
defer typ.AssertExpectations(t)
|
|
c := TestCache(t)
|
|
c.RegisterType("t", typ, nil)
|
|
|
|
// Configure the type
|
|
triggerCh := make(chan time.Time)
|
|
typ.Static(FetchResult{Value: 42}, nil).WaitUntil(triggerCh).Times(1)
|
|
|
|
// Perform multiple gets
|
|
getCh1 := TestCacheGetCh(t, c, "t", TestRequest(t, RequestInfo{Key: "hello"}))
|
|
getCh2 := TestCacheGetCh(t, c, "t", TestRequest(t, RequestInfo{Key: "hello"}))
|
|
|
|
// They should block
|
|
select {
|
|
case <-getCh1:
|
|
t.Fatal("should block (ch1)")
|
|
case <-getCh2:
|
|
t.Fatal("should block (ch2)")
|
|
case <-time.After(50 * time.Millisecond):
|
|
}
|
|
|
|
// Trigger it
|
|
close(triggerCh)
|
|
|
|
// Should return
|
|
TestCacheGetChResult(t, getCh1, 42)
|
|
TestCacheGetChResult(t, getCh2, 42)
|
|
}
|
|
|
|
// Test that Get with different cache keys both block on initial value
|
|
// but that the fetches were both properly called.
|
|
func TestCacheGet_blockingInitDiffKeys(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
require := require.New(t)
|
|
|
|
typ := TestType(t)
|
|
defer typ.AssertExpectations(t)
|
|
c := TestCache(t)
|
|
c.RegisterType("t", typ, nil)
|
|
|
|
// Keep track of the keys
|
|
var keysLock sync.Mutex
|
|
var keys []string
|
|
|
|
// Configure the type
|
|
triggerCh := make(chan time.Time)
|
|
typ.Static(FetchResult{Value: 42}, nil).
|
|
WaitUntil(triggerCh).
|
|
Times(2).
|
|
Run(func(args mock.Arguments) {
|
|
keysLock.Lock()
|
|
defer keysLock.Unlock()
|
|
keys = append(keys, args.Get(1).(Request).CacheInfo().Key)
|
|
})
|
|
|
|
// Perform multiple gets
|
|
getCh1 := TestCacheGetCh(t, c, "t", TestRequest(t, RequestInfo{Key: "hello"}))
|
|
getCh2 := TestCacheGetCh(t, c, "t", TestRequest(t, RequestInfo{Key: "goodbye"}))
|
|
|
|
// They should block
|
|
select {
|
|
case <-getCh1:
|
|
t.Fatal("should block (ch1)")
|
|
case <-getCh2:
|
|
t.Fatal("should block (ch2)")
|
|
case <-time.After(50 * time.Millisecond):
|
|
}
|
|
|
|
// Trigger it
|
|
close(triggerCh)
|
|
|
|
// Should return both!
|
|
TestCacheGetChResult(t, getCh1, 42)
|
|
TestCacheGetChResult(t, getCh2, 42)
|
|
|
|
// Verify proper keys
|
|
sort.Strings(keys)
|
|
require.Equal([]string{"goodbye", "hello"}, keys)
|
|
}
|
|
|
|
// Test a get with an index set will wait until an index that is higher
|
|
// is set in the cache.
|
|
func TestCacheGet_blockingIndex(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
typ := TestType(t)
|
|
defer typ.AssertExpectations(t)
|
|
c := TestCache(t)
|
|
c.RegisterType("t", typ, nil)
|
|
|
|
// Configure the type
|
|
triggerCh := make(chan time.Time)
|
|
typ.Static(FetchResult{Value: 1, Index: 4}, nil).Once()
|
|
typ.Static(FetchResult{Value: 12, Index: 5}, nil).Once()
|
|
typ.Static(FetchResult{Value: 42, Index: 6}, nil).WaitUntil(triggerCh)
|
|
|
|
// Fetch should block
|
|
resultCh := TestCacheGetCh(t, c, "t", TestRequest(t, RequestInfo{
|
|
Key: "hello", MinIndex: 5}))
|
|
|
|
// Should block
|
|
select {
|
|
case <-resultCh:
|
|
t.Fatal("should block")
|
|
case <-time.After(50 * time.Millisecond):
|
|
}
|
|
|
|
// Wait a bit
|
|
close(triggerCh)
|
|
|
|
// Should return
|
|
TestCacheGetChResult(t, resultCh, 42)
|
|
}
|
|
|
|
// Test a get with an index set will timeout if the fetch doesn't return
|
|
// anything.
|
|
func TestCacheGet_blockingIndexTimeout(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
typ := TestType(t)
|
|
defer typ.AssertExpectations(t)
|
|
c := TestCache(t)
|
|
c.RegisterType("t", typ, nil)
|
|
|
|
// Configure the type
|
|
triggerCh := make(chan time.Time)
|
|
typ.Static(FetchResult{Value: 1, Index: 4}, nil).Once()
|
|
typ.Static(FetchResult{Value: 12, Index: 5}, nil).Once()
|
|
typ.Static(FetchResult{Value: 42, Index: 6}, nil).WaitUntil(triggerCh)
|
|
|
|
// Fetch should block
|
|
resultCh := TestCacheGetCh(t, c, "t", TestRequest(t, RequestInfo{
|
|
Key: "hello", MinIndex: 5, Timeout: 200 * time.Millisecond}))
|
|
|
|
// Should block
|
|
select {
|
|
case <-resultCh:
|
|
t.Fatal("should block")
|
|
case <-time.After(50 * time.Millisecond):
|
|
}
|
|
|
|
// Should return after more of the timeout
|
|
select {
|
|
case result := <-resultCh:
|
|
require.Equal(t, 12, result)
|
|
case <-time.After(300 * time.Millisecond):
|
|
t.Fatal("should've returned")
|
|
}
|
|
}
|
|
|
|
// Test that if a Type returns an empty value on Fetch that the previous
|
|
// value is preserved.
|
|
func TestCacheGet_emptyFetchResult(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
require := require.New(t)
|
|
|
|
typ := TestType(t)
|
|
defer typ.AssertExpectations(t)
|
|
c := TestCache(t)
|
|
c.RegisterType("t", typ, nil)
|
|
|
|
// Configure the type
|
|
typ.Static(FetchResult{Value: 42, Index: 1}, nil).Times(1)
|
|
typ.Static(FetchResult{Value: nil}, nil)
|
|
|
|
// Get, should fetch
|
|
req := TestRequest(t, RequestInfo{Key: "hello"})
|
|
result, err := c.Get("t", req)
|
|
require.NoError(err)
|
|
require.Equal(42, result)
|
|
|
|
// Get, should not fetch since we already have a satisfying value
|
|
req = TestRequest(t, RequestInfo{
|
|
Key: "hello", MinIndex: 1, Timeout: 100 * time.Millisecond})
|
|
result, err = c.Get("t", req)
|
|
require.NoError(err)
|
|
require.Equal(42, result)
|
|
|
|
// Sleep a tiny bit just to let maybe some background calls happen
|
|
// then verify that we still only got the one call
|
|
time.Sleep(20 * time.Millisecond)
|
|
typ.AssertExpectations(t)
|
|
}
|
|
|
|
// Test that a type registered with a periodic refresh will perform
|
|
// that refresh after the timer is up.
|
|
func TestCacheGet_periodicRefresh(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
typ := TestType(t)
|
|
defer typ.AssertExpectations(t)
|
|
c := TestCache(t)
|
|
c.RegisterType("t", typ, &RegisterOptions{
|
|
Refresh: true,
|
|
RefreshTimer: 100 * time.Millisecond,
|
|
RefreshTimeout: 5 * time.Minute,
|
|
})
|
|
|
|
// This is a bit weird, but we do this to ensure that the final
|
|
// call to the Fetch (if it happens, depends on timing) just blocks.
|
|
triggerCh := make(chan time.Time)
|
|
defer close(triggerCh)
|
|
|
|
// Configure the type
|
|
typ.Static(FetchResult{Value: 1, Index: 4}, nil).Once()
|
|
typ.Static(FetchResult{Value: 12, Index: 5}, nil).Once()
|
|
typ.Static(FetchResult{Value: 12, Index: 5}, nil).WaitUntil(triggerCh)
|
|
|
|
// Fetch should block
|
|
resultCh := TestCacheGetCh(t, c, "t", TestRequest(t, RequestInfo{Key: "hello"}))
|
|
TestCacheGetChResult(t, resultCh, 1)
|
|
|
|
// Fetch again almost immediately should return old result
|
|
time.Sleep(5 * time.Millisecond)
|
|
resultCh = TestCacheGetCh(t, c, "t", TestRequest(t, RequestInfo{Key: "hello"}))
|
|
TestCacheGetChResult(t, resultCh, 1)
|
|
|
|
// Wait for the timer
|
|
time.Sleep(200 * time.Millisecond)
|
|
resultCh = TestCacheGetCh(t, c, "t", TestRequest(t, RequestInfo{Key: "hello"}))
|
|
TestCacheGetChResult(t, resultCh, 12)
|
|
}
|
|
|
|
// Test that the backend fetch sets the proper timeout.
|
|
func TestCacheGet_fetchTimeout(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
require := require.New(t)
|
|
|
|
typ := TestType(t)
|
|
defer typ.AssertExpectations(t)
|
|
c := TestCache(t)
|
|
|
|
// Register the type with a timeout
|
|
timeout := 10 * time.Minute
|
|
c.RegisterType("t", typ, &RegisterOptions{
|
|
RefreshTimeout: timeout,
|
|
})
|
|
|
|
// Configure the type
|
|
var actual time.Duration
|
|
typ.Static(FetchResult{Value: 42}, nil).Times(1).Run(func(args mock.Arguments) {
|
|
opts := args.Get(0).(FetchOptions)
|
|
actual = opts.Timeout
|
|
})
|
|
|
|
// Get, should fetch
|
|
req := TestRequest(t, RequestInfo{Key: "hello"})
|
|
result, err := c.Get("t", req)
|
|
require.NoError(err)
|
|
require.Equal(42, result)
|
|
|
|
// Test the timeout
|
|
require.Equal(timeout, actual)
|
|
}
|
|
|
|
// Test that entries expire
|
|
func TestCacheGet_expire(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
require := require.New(t)
|
|
|
|
typ := TestType(t)
|
|
defer typ.AssertExpectations(t)
|
|
c := TestCache(t)
|
|
|
|
// Register the type with a timeout
|
|
c.RegisterType("t", typ, &RegisterOptions{
|
|
LastGetTTL: 400 * time.Millisecond,
|
|
})
|
|
|
|
// Configure the type
|
|
typ.Static(FetchResult{Value: 42}, nil).Times(2)
|
|
|
|
// Get, should fetch
|
|
req := TestRequest(t, RequestInfo{Key: "hello"})
|
|
result, err := c.Get("t", req)
|
|
require.NoError(err)
|
|
require.Equal(42, result)
|
|
|
|
// Get, should not fetch, verified via the mock assertions above
|
|
hits := c.Hits()
|
|
req = TestRequest(t, RequestInfo{Key: "hello"})
|
|
result, err = c.Get("t", req)
|
|
require.NoError(err)
|
|
require.Equal(42, result)
|
|
require.Equal(hits+1, c.Hits())
|
|
|
|
// Sleep for the expiry
|
|
time.Sleep(500 * time.Millisecond)
|
|
|
|
// Get, should fetch
|
|
req = TestRequest(t, RequestInfo{Key: "hello"})
|
|
result, err = c.Get("t", req)
|
|
require.NoError(err)
|
|
require.Equal(42, result)
|
|
|
|
// Sleep a tiny bit just to let maybe some background calls happen
|
|
// then verify that we still only got the one call
|
|
time.Sleep(20 * time.Millisecond)
|
|
typ.AssertExpectations(t)
|
|
}
|
|
|
|
// Test that entries reset their TTL on Get
|
|
func TestCacheGet_expireResetGet(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
require := require.New(t)
|
|
|
|
typ := TestType(t)
|
|
defer typ.AssertExpectations(t)
|
|
c := TestCache(t)
|
|
|
|
// Register the type with a timeout
|
|
c.RegisterType("t", typ, &RegisterOptions{
|
|
LastGetTTL: 150 * time.Millisecond,
|
|
})
|
|
|
|
// Configure the type
|
|
typ.Static(FetchResult{Value: 42}, nil).Times(2)
|
|
|
|
// Get, should fetch
|
|
req := TestRequest(t, RequestInfo{Key: "hello"})
|
|
result, err := c.Get("t", req)
|
|
require.NoError(err)
|
|
require.Equal(42, result)
|
|
|
|
// Fetch multiple times, where the total time is well beyond
|
|
// the TTL. We should not trigger any fetches during this time.
|
|
for i := 0; i < 5; i++ {
|
|
// Sleep a bit
|
|
time.Sleep(50 * time.Millisecond)
|
|
|
|
// Get, should not fetch
|
|
req = TestRequest(t, RequestInfo{Key: "hello"})
|
|
result, err = c.Get("t", req)
|
|
require.NoError(err)
|
|
require.Equal(42, result)
|
|
}
|
|
|
|
time.Sleep(200 * time.Millisecond)
|
|
|
|
// Get, should fetch
|
|
req = TestRequest(t, RequestInfo{Key: "hello"})
|
|
result, err = c.Get("t", req)
|
|
require.NoError(err)
|
|
require.Equal(42, result)
|
|
|
|
// Sleep a tiny bit just to let maybe some background calls happen
|
|
// then verify that we still only got the one call
|
|
time.Sleep(20 * time.Millisecond)
|
|
typ.AssertExpectations(t)
|
|
}
|
|
|
|
// Test that Get partitions the caches based on DC so two equivalent requests
|
|
// to different datacenters are automatically cached even if their keys are
|
|
// the same.
|
|
func TestCacheGet_partitionDC(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
c := TestCache(t)
|
|
c.RegisterType("t", &testPartitionType{}, nil)
|
|
|
|
// Perform multiple gets
|
|
getCh1 := TestCacheGetCh(t, c, "t", TestRequest(t, RequestInfo{
|
|
Datacenter: "dc1", Key: "hello"}))
|
|
getCh2 := TestCacheGetCh(t, c, "t", TestRequest(t, RequestInfo{
|
|
Datacenter: "dc9", Key: "hello"}))
|
|
|
|
// Should return both!
|
|
TestCacheGetChResult(t, getCh1, "dc1")
|
|
TestCacheGetChResult(t, getCh2, "dc9")
|
|
}
|
|
|
|
// Test that Get partitions the caches based on token so two equivalent requests
|
|
// with different ACL tokens do not return the same result.
|
|
func TestCacheGet_partitionToken(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
c := TestCache(t)
|
|
c.RegisterType("t", &testPartitionType{}, nil)
|
|
|
|
// Perform multiple gets
|
|
getCh1 := TestCacheGetCh(t, c, "t", TestRequest(t, RequestInfo{
|
|
Token: "", Key: "hello"}))
|
|
getCh2 := TestCacheGetCh(t, c, "t", TestRequest(t, RequestInfo{
|
|
Token: "foo", Key: "hello"}))
|
|
|
|
// Should return both!
|
|
TestCacheGetChResult(t, getCh1, "")
|
|
TestCacheGetChResult(t, getCh2, "foo")
|
|
}
|
|
|
|
// testPartitionType implements Type for testing that simply returns a value
|
|
// comprised of the request DC and ACL token, used for testing cache
|
|
// partitioning.
|
|
type testPartitionType struct{}
|
|
|
|
func (t *testPartitionType) Fetch(opts FetchOptions, r Request) (FetchResult, error) {
|
|
info := r.CacheInfo()
|
|
return FetchResult{
|
|
Value: fmt.Sprintf("%s%s", info.Datacenter, info.Token),
|
|
}, nil
|
|
}
|