[OE-core] [PATCH] oeqa/selftest/wic: add test case for sparse images

Joshua Lock joshua.lock at collabora.co.uk
Thu Dec 17 16:09:15 UTC 2015


Add a testcase to build a directdisk image and check that the
used disk size is less than the apparent size, as wic now
assembles images as sparse files.

Signed-off-by: Joshua Lock <joshua.lock at collabora.co.uk>
---
 meta/lib/oeqa/selftest/wic.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/meta/lib/oeqa/selftest/wic.py b/meta/lib/oeqa/selftest/wic.py
index 55f6f82..e85363c 100644
--- a/meta/lib/oeqa/selftest/wic.py
+++ b/meta/lib/oeqa/selftest/wic.py
@@ -264,3 +264,15 @@ class Wic(oeSelfTest):
         self.assertEqual(0, runCmd("wic create %s -e core-image-minimal" \
                                    % image).status)
         self.assertEqual(1, len(glob(self.resultdir + "%s-*direct" % image)))
+
+    def test_sparseness(self):
+        """Test that assembled images are sparse; apparent size > disk usage"""
+        self.assertEqual(0, runCmd("wic create directdisk "
+                                   "--image-name core-image-minimal").status)
+        images = glob(self.resultdir + "directdisk-*.direct")
+        self.assertEqual(1, len(images))
+
+        path = images.pop()
+        used = int(runCmd("du %s | awk '{print $1}'" % path).output)
+        apparent = int(runCmd("du --apparent-size %s | awk '{print $1}'" % path).output)
+        self.assertLess(used, apparent)
-- 
2.5.0




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