[OE-core][PATCH] wic: Fix --extra-space argument handling

["Joshua Watt" <JPEWhacker@gmail.com>]

467f84e12b ("wic: Add --offset argument for partitions") broke the
--extra-space argument handling in wic. Fix the option and add a unit
test for the argument.

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
---
 meta/lib/oeqa/selftest/cases/wic.py | 15 +++++++++++++++
 scripts/lib/wic/ksparser.py         |  2 +-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/meta/lib/oeqa/selftest/cases/wic.py b/meta/lib/oeqa/selftest/cases/wic.py
index 9e7be6168e..8b58285c32 100644
--- a/meta/lib/oeqa/selftest/cases/wic.py
+++ b/meta/lib/oeqa/selftest/cases/wic.py
@@ -908,6 +908,21 @@ class Wic2(WicTestCase):
             p, _ = self._get_wic_partitions(tempf.name, ignore_status=True)
             self.assertNotEqual(p.status, 0, "wic exited successfully when an error was expected:\n%s" % p.output)
 
+    def test_extra_space(self):
+        native_sysroot = get_bb_var("RECIPE_SYSROOT_NATIVE", "wic-tools")
+
+        with NamedTemporaryFile("w", suffix=".wks") as tempf:
+            tempf.write("bootloader --ptable gpt\n" \
+                        "part /     --source rootfs --ondisk hda --extra-space 200M --fstype=ext4\n")
+            tempf.flush()
+
+            _, partlns = self._get_wic_partitions(tempf.name, native_sysroot)
+            self.assertEqual(len(partlns), 1)
+            size = partlns[0].split(':')[3]
+            self.assertRegex(size, r'^[0-9]+kiB$')
+            size = int(size[:-3])
+            self.assertGreaterEqual(size, 204800)
+
     @only_for_arch(['i586', 'i686', 'x86_64'])
     def test_rawcopy_plugin_qemu(self):
         """Test rawcopy plugin in qemu"""
diff --git a/scripts/lib/wic/ksparser.py b/scripts/lib/wic/ksparser.py
index 05ae292ef5..3453d9cb9d 100644
--- a/scripts/lib/wic/ksparser.py
+++ b/scripts/lib/wic/ksparser.py
@@ -145,7 +145,7 @@ class KickStart():
         part.add_argument('--exclude-path', nargs='+')
         part.add_argument('--include-path', nargs='+', action='append')
         part.add_argument('--change-directory')
-        part.add_argument("--extra-space", type=sizetype)
+        part.add_argument("--extra-space", type=sizetype("M"))
         part.add_argument('--fsoptions', dest='fsopts')
         part.add_argument('--fstype', default='vfat',
                           choices=('ext2', 'ext3', 'ext4', 'btrfs',
-- 
2.26.2