test storing frame cache size

fragment.go

@@ -44,7 +44,7 @@ const (
 	// HashBlockSize is the number of bitmaps in a merkle hash block.
 	HashBlockSize = 100
 
-	// Percentage of the ThresholdLength size to resort the cache at
+	// ThresholdBufferPct is the percentage of the ThresholdLength size to resort the cache at
 	ThresholdBufferPct = 0.9
 )
 

frame_test.go

@@ -126,3 +126,24 @@ func (f *Frame) MustSetBit(view string, bitmapID, profileID uint64, t *time.Time
 	}
 	return changed
 }
+
+// Ensure frame can set its cache
+func TestFrame_SetCacheSize(t *testing.T) {
+	f := MustOpenFrame()
+	defer f.Close()
+	cacheSize := 100
+
+	// Set & retrieve frame cache size.
+	if err := f.SetRankedCacheSize(cacheSize); err != nil {
+		t.Fatal(err)
+	} else if q := f.RankedCacheSize(); q != cacheSize {
+		t.Fatalf("unexpected frame cache size: %d", q)
+	}
+
+	// Reload frame and verify that it is persisted.
+	if err := f.Reopen(); err != nil {
+		t.Fatal(err)
+	} else if q := f.RankedCacheSize(); q != cacheSize {
+		t.Fatalf("unexpected frame cache size (reopen): %d", q)
+	}
+}