authorize: use query instead of sync for databroker data (#3377)

pkg/storage/cache_test.go

@@ -0,0 +1,73 @@
+package storage
+
+import (
+	"context"
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestLocalCache(t *testing.T) {
+	ctx, clearTimeout := context.WithTimeout(context.Background(), time.Second*10)
+	defer clearTimeout()
+
+	callCount := 0
+	update := func(ctx context.Context) ([]byte, error) {
+		callCount++
+		return []byte("v1"), nil
+	}
+	c := NewLocalCache()
+	v, err := c.GetOrUpdate(ctx, []byte("k1"), update)
+	assert.NoError(t, err)
+	assert.Equal(t, []byte("v1"), v)
+	assert.Equal(t, 1, callCount)
+
+	v, err = c.GetOrUpdate(ctx, []byte("k1"), update)
+	assert.NoError(t, err)
+	assert.Equal(t, []byte("v1"), v)
+	assert.Equal(t, 1, callCount)
+
+	c.Invalidate([]byte("k1"))
+
+	v, err = c.GetOrUpdate(ctx, []byte("k1"), update)
+	assert.NoError(t, err)
+	assert.Equal(t, []byte("v1"), v)
+	assert.Equal(t, 2, callCount)
+}
+
+func TestGlobalCache(t *testing.T) {
+	ctx, clearTimeout := context.WithTimeout(context.Background(), time.Second*10)
+	defer clearTimeout()
+
+	callCount := 0
+	update := func(ctx context.Context) ([]byte, error) {
+		callCount++
+		return []byte("v1"), nil
+	}
+	c := NewGlobalCache(time.Millisecond * 100)
+	v, err := c.GetOrUpdate(ctx, []byte("k1"), update)
+	assert.NoError(t, err)
+	assert.Equal(t, []byte("v1"), v)
+	assert.Equal(t, 1, callCount)
+
+	v, err = c.GetOrUpdate(ctx, []byte("k1"), update)
+	assert.NoError(t, err)
+	assert.Equal(t, []byte("v1"), v)
+	assert.Equal(t, 1, callCount)
+
+	c.Invalidate([]byte("k1"))
+
+	v, err = c.GetOrUpdate(ctx, []byte("k1"), update)
+	assert.NoError(t, err)
+	assert.Equal(t, []byte("v1"), v)
+	assert.Equal(t, 2, callCount)
+
+	assert.Eventually(t, func() bool {
+		_, err := c.GetOrUpdate(ctx, []byte("k1"), func(ctx context.Context) ([]byte, error) {
+			return nil, fmt.Errorf("ERROR")
+		})
+		return err != nil
+	}, time.Second, time.Millisecond*10, "should honor TTL")
+}