1 files changed, 138 insertions, 0 deletions
diff --git a/cache/partitioned_lazy_cache_test.go b/cache/partitioned_lazy_cache_test.go
new file mode 100644
index 000000000..ba8b6a454
--- /dev/null
+++ b/cache/partitioned_lazy_cache_test.go
@@ -0,0 +1,138 @@
+// Copyright 2017-present The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cache
+
+import (
+	"errors"
+	"sync"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestNewPartitionedLazyCache(t *testing.T) {
+	t.Parallel()
+
+	assert := require.New(t)
+
+	p1 := Partition{
+		Key: "p1",
+		Load: func() (map[string]interface{}, error) {
+			return map[string]interface{}{
+				"p1_1":   "p1v1",
+				"p1_2":   "p1v2",
+				"p1_nil": nil,
+			}, nil
+		},
+	}
+
+	p2 := Partition{
+		Key: "p2",
+		Load: func() (map[string]interface{}, error) {
+			return map[string]interface{}{
+				"p2_1": "p2v1",
+				"p2_2": "p2v2",
+				"p2_3": "p2v3",
+			}, nil
+		},
+	}
+
+	cache := NewPartitionedLazyCache(p1, p2)
+
+	v, err := cache.Get("p1", "p1_1")
+	assert.NoError(err)
+	assert.Equal("p1v1", v)
+
+	v, err = cache.Get("p1", "p2_1")
+	assert.NoError(err)
+	assert.Nil(v)
+
+	v, err = cache.Get("p1", "p1_nil")
+	assert.NoError(err)
+	assert.Nil(v)
+
+	v, err = cache.Get("p2", "p2_3")
+	assert.NoError(err)
+	assert.Equal("p2v3", v)
+
+	v, err = cache.Get("doesnotexist", "p1_1")
+	assert.NoError(err)
+	assert.Nil(v)
+
+	v, err = cache.Get("p1", "doesnotexist")
+	assert.NoError(err)
+	assert.Nil(v)
+
+	errorP := Partition{
+		Key: "p3",
+		Load: func() (map[string]interface{}, error) {
+			return nil, errors.New("Failed")
+		},
+	}
+
+	cache = NewPartitionedLazyCache(errorP)
+
+	v, err = cache.Get("p1", "doesnotexist")
+	assert.NoError(err)
+	assert.Nil(v)
+
+	_, err = cache.Get("p3", "doesnotexist")
+	assert.Error(err)
+
+}
+
+func TestConcurrentPartitionedLazyCache(t *testing.T) {
+	t.Parallel()
+
+	assert := require.New(t)
+
+	var wg sync.WaitGroup
+
+	p1 := Partition{
+		Key: "p1",
+		Load: func() (map[string]interface{}, error) {
+			return map[string]interface{}{
+				"p1_1":   "p1v1",
+				"p1_2":   "p1v2",
+				"p1_nil": nil,
+			}, nil
+		},
+	}
+
+	p2 := Partition{
+		Key: "p2",
+		Load: func() (map[string]interface{}, error) {
+			return map[string]interface{}{
+				"p2_1": "p2v1",
+				"p2_2": "p2v2",
+				"p2_3": "p2v3",
+			}, nil
+		},
+	}
+
+	cache := NewPartitionedLazyCache(p1, p2)
+
+	for i := 0; i < 100; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			for j := 0; j < 10; j++ {
+				v, err := cache.Get("p1", "p1_1")
+				assert.NoError(err)
+				assert.Equal("p1v1", v)
+			}
+		}()
+	}
+	wg.Wait()
+}