oe-selftest: Build wic runtime requirements and images before testing

Some native tools (syslinux, parted, mtools, etc) are required
by wic to produce images. Unit tests fail if the tools are
not available.

Baked tools and image-core-minimal used by wic before running tests.

[YOCTO #7730]

(From OE-Core rev: 379c9bb7ffae5b40c5450e968cdde600b6edd3f3)

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

meta/lib/oeqa/selftest/wic.py

@@ -29,13 +29,19 @@ from glob import glob
 from shutil import rmtree
 
 from oeqa.selftest.base import oeSelfTest
-from oeqa.utils.commands import runCmd
+from oeqa.utils.commands import runCmd, bitbake
 
 class Wic(oeSelfTest):
     """Wic test class."""
 
     resultdir = "/var/tmp/wic/build/"
 
+    @classmethod
+    def setUpClass(cls):
+        """Build wic runtime dependencies and images used in the tests."""
+        bitbake('syslinux syslinux-native parted-native '
+                'dosfstools-native mtools-native core-image-minimal')
+
     def setUp(self):
         """This code is executed before each test method."""
         rmtree(self.resultdir, ignore_errors=True)