1 files changed, 27 insertions, 0 deletions
diff --git a/pkg/sentry/fs/ext/disklayout/extent_test.go b/pkg/sentry/fs/ext/disklayout/extent_test.go
new file mode 100644
index 000000000..b0fad9b71
--- /dev/null
+++ b/pkg/sentry/fs/ext/disklayout/extent_test.go
@@ -0,0 +1,27 @@
+// Copyright 2019 The gVisor Authors.
+//
+// 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 disklayout
+
+import (
+	"testing"
+)
+
+// TestExtentSize tests that the extent structs are of the correct
+// size.
+func TestExtentSize(t *testing.T) {
+	assertSize(t, ExtentHeader{}, ExtentStructsSize)
+	assertSize(t, ExtentIdx{}, ExtentStructsSize)
+	assertSize(t, Extent{}, ExtentStructsSize)
+}