selftest: add new test case test_wic_ls

Tested 'wic ls' functionality:
 - list of image partitions
 - list of directory content of vfat partition

(From OE-Core rev: 3b271f6a40d7ef93fff9700dd8ac98bddd92d581)

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/selftest/cases/wic.py

@@ -791,3 +791,23 @@ part /etc --source rootfs --ondisk mmcblk0 --fstype=ext4 --exclude-path bin/ --r
                 # 8 blocks is 4K (physical sector size)
                 self.assertEqual(dest_stat.st_blocks, 8)
             os.unlink(dest)
+
+    def test_wic_ls(self):
+        """Test listing image content using 'wic ls'"""
+        self.assertEqual(0, runCmd("wic create wictestdisk "
+                                   "--image-name=core-image-minimal "
+                                   "-D -o %s" % self.resultdir).status)
+        images = glob(self.resultdir + "wictestdisk-*.direct")
+        self.assertEqual(1, len(images))
+
+        sysroot = get_bb_var('RECIPE_SYSROOT_NATIVE', 'wic-tools')
+
+        # list partitions
+        result = runCmd("wic ls %s -n %s" % (images[0], sysroot))
+        self.assertEqual(0, result.status)
+        self.assertEqual(3, len(result.output.split('\n')))
+
+        # list directory content of the first partition
+        result = runCmd("wic ls %s:1/ -n %s" % (images[0], sysroot))
+        self.assertEqual(0, result.status)
+        self.assertEqual(6, len(result.output.split('\n')))