Ping

Test with/without  usrmege feature passed.

With usrmerge:

NOTE: test_dnf_installroot (dnf.DnfRepoTest)
DEBUG: Checking if 'DISTRO_FEATURES' value contains 'usrmerge' to skip the test
NOTE:  ... skipped 'Test run when not enable usrmerge'
Test run when not enable usrmerge
NOTE: test_dnf_installroot_usrmerge (dnf.DnfRepoTest)
DEBUG: Checking if 'DISTRO_FEATURES' value contains 'usrmerge' to run the test
DEBUG: [Running]$ ssh -l root -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -o LogLevel=ERROR 192.168.7.16 export PATH=/usr/sbin:/sbin:/usr/bin:/bin; mkdir -p /home/root/chroot/test/etc
....

Without usrmerge:

NOTE: test_dnf_installroot (dnf.DnfRepoTest)
DEBUG: Checking if 'DISTRO_FEATURES' value contains 'usrmerge' to skip the test
DEBUG: [Running]$ ssh -l root -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -o LogLevel=ERROR 192.168.7.10 export PATH=/usr/sbin:/sbin:/usr/bin:/bin; mkdir -p /home/root/chroot/test/etc
DEBUG: time: 1567404974.8490767, endtime: 1567406474.8424258
DEBUG: [Command returned '0' after 0.13 seconds]
DEBUG: Command: mkdir -p /home/root/chroot/test/etc
Output: 
...

NOTE:  ... ok
NOTE: test_dnf_installroot_usrmerge (dnf.DnfRepoTest)
DEBUG: Checking if 'DISTRO_FEATURES' value contains 'usrmerge' to run the test
NOTE:  ... skipped 'Test run when enable usrmege'
Test run when enable usrmege

From: Changqing Li <changqing.li@windriver.com>

Signed-off-by: Changqing Li <changqing.li@windriver.com>
---
 meta/lib/oeqa/runtime/cases/dnf.py | 34 +++++++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/meta/lib/oeqa/runtime/cases/dnf.py b/meta/lib/oeqa/runtime/cases/dnf.py
index 629b9af..80cc86a 100644
--- a/meta/lib/oeqa/runtime/cases/dnf.py
+++ b/meta/lib/oeqa/runtime/cases/dnf.py
@@ -9,7 +9,7 @@ from oeqa.utils.httpserver import HTTPService
 
 from oeqa.runtime.case import OERuntimeTestCase
 from oeqa.core.decorator.depends import OETestDepends
-from oeqa.core.decorator.data import skipIfNotDataVar, skipIfNotFeature
+from oeqa.core.decorator.data import skipIfNotDataVar, skipIfNotFeature, skipIfInDataVar, skipIfNotInDataVar
 from oeqa.runtime.decorator.package import OEHasPackage
 
 class DnfTest(OERuntimeTestCase):
@@ -116,6 +116,7 @@ class DnfRepoTest(DnfTest):
         self.dnf_with_repo('reinstall -y run-postinsts-dev')
 
     @OETestDepends(['dnf.DnfRepoTest.test_dnf_makecache'])
+    @skipIfInDataVar('DISTRO_FEATURES', 'usrmerge', 'Test run when not enable usrmerge')
     def test_dnf_installroot(self):
         rootpath = '/home/root/chroot/test'
         #Copy necessary files to avoid errors with not yet installed tools on
@@ -141,6 +142,37 @@ class DnfRepoTest(DnfTest):
         self.assertEqual(0, status, output)
 
     @OETestDepends(['dnf.DnfRepoTest.test_dnf_makecache'])
+    @skipIfNotInDataVar('DISTRO_FEATURES', 'usrmerge', 'Test run when enable usrmege')
+    def test_dnf_installroot_usrmerge(self):
+        rootpath = '/home/root/chroot/test'
+        #Copy necessary files to avoid errors with not yet installed tools on
+        #installroot directory.
+        self.target.run('mkdir -p %s/etc' % rootpath, 1500)
+        self.target.run('mkdir -p %s/usr/bin %s/usr/sbin' % (rootpath, rootpath), 1500)
+        self.target.run('ln -sf -r %s/usr/bin %s/bin'  % (rootpath, rootpath), 1500)
+        self.target.run('ln -sf -r %s/usr/sbin %s/sbin'  % (rootpath, rootpath), 1500)
+        self.target.run('mkdir -p %s/dev' % rootpath, 1500)
+        #Handle different architectures lib dirs
+        self.target.run('mkdir -p %s/usr/lib' % rootpath, 1500)
+        self.target.run('mkdir -p %s/usr/libx32' % rootpath, 1500)
+        self.target.run('mkdir -p %s/usr/lib64' % rootpath, 1500)
+        self.target.run('cp /lib/libtinfo.so.5 %s/usr/lib' % rootpath, 1500)
+        self.target.run('cp /libx32/libtinfo.so.5 %s/usr/libx32' % rootpath, 1500)
+        self.target.run('cp /lib64/libtinfo.so.5 %s/usr/lib64' % rootpath, 1500)
+        self.target.run('ln -sf -r %s/lib %s/usr/lib' % (rootpath,rootpath), 1500)
+        self.target.run('ln -sf -r %s/libx32 %s/usr/libx32' % (rootpath,rootpath), 1500)
+        self.target.run('ln -sf -r %s/lib64 %s/usr/lib64' % (rootpath,rootpath), 1500)
+        self.target.run('cp -r /etc/rpm %s/etc' % rootpath, 1500)
+        self.target.run('cp -r /etc/dnf %s/etc' % rootpath, 1500)
+        self.target.run('cp /bin/sh %s/bin' % rootpath, 1500)
+        self.target.run('mount -o bind /dev %s/dev/' % rootpath, 1500)
+        self.dnf_with_repo('install --installroot=%s -v -y --rpmverbosity=debug busybox run-postinsts' % rootpath)
+        status, output = self.target.run('test -e %s/var/cache/dnf' % rootpath, 1500)
+        self.assertEqual(0, status, output)
+        status, output = self.target.run('test -e %s/bin/busybox' % rootpath, 1500)
+        self.assertEqual(0, status, output)
+
+    @OETestDepends(['dnf.DnfRepoTest.test_dnf_makecache'])
     def test_dnf_exclude(self):
         excludepkg = 'curl-dev'
         self.dnf_with_repo('install -y curl*')

-- 
BRs

Sandy(Li Changqing)