1 files changed, 86 insertions, 0 deletions
diff --git a/resources/page/pages_cache_test.go b/resources/page/pages_cache_test.go
new file mode 100644
index 000000000..b83283408
--- /dev/null
+++ b/resources/page/pages_cache_test.go
@@ -0,0 +1,86 @@
+// Copyright 2019 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 page
+
+import (
+	"strconv"
+	"sync"
+	"sync/atomic"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPageCache(t *testing.T) {
+	t.Parallel()
+	c1 := newPageCache()
+
+	changeFirst := func(p Pages) {
+		p[0].(*testPage).description = "changed"
+	}
+
+	var o1 uint64
+	var o2 uint64
+
+	var wg sync.WaitGroup
+
+	var l1 sync.Mutex
+	var l2 sync.Mutex
+
+	var testPageSets []Pages
+
+	for i := 0; i < 50; i++ {
+		testPageSets = append(testPageSets, createSortTestPages(i+1))
+	}
+
+	for j := 0; j < 100; j++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			for k, pages := range testPageSets {
+				l1.Lock()
+				p, c := c1.get("k1", nil, pages)
+				assert.Equal(t, !atomic.CompareAndSwapUint64(&o1, uint64(k), uint64(k+1)), c)
+				l1.Unlock()
+				p2, c2 := c1.get("k1", nil, p)
+				assert.True(t, c2)
+				assert.True(t, pagesEqual(p, p2))
+				assert.True(t, pagesEqual(p, pages))
+				assert.NotNil(t, p)
+
+				l2.Lock()
+				p3, c3 := c1.get("k2", changeFirst, pages)
+				assert.Equal(t, !atomic.CompareAndSwapUint64(&o2, uint64(k), uint64(k+1)), c3)
+				l2.Unlock()
+				assert.NotNil(t, p3)
+				assert.Equal(t, p3[0].(*testPage).description, "changed")
+			}
+		}()
+	}
+	wg.Wait()
+}
+
+func BenchmarkPageCache(b *testing.B) {
+	cache := newPageCache()
+	pages := make(Pages, 30)
+	for i := 0; i < 30; i++ {
+		pages[i] = &testPage{title: "p" + strconv.Itoa(i)}
+	}
+	key := "key"
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		cache.getP(key, nil, pages)
+	}
+}