LU-2202: Start unittests during installation or build of pungi

* added section with tests and pytest module to requires
IMPORTANT - build.sh script is commented
* added pyfakefs dependency
* fixed little mock_open issue for runroot test
* bumped version

@BS-TARGET-CL8

Change-Id: I036db225646875eb610736cd26f473850a78447c

pungi.spec

@@ -1,7 +1,7 @@
 %{?python_enable_dependency_generator}
 
 Name:           pungi
-Version:        4.2.9
+Version:        4.2.10
 Release:        1%{?dist}.cloudlinux
 Summary:        Distribution compose tool
 
@@ -10,7 +10,10 @@ URL:            https://pagure.io/pungi
 Source0:        %{name}-%{version}.tar.bz2
 
 BuildRequires:  python3-nose
+BuildRequires:  python3-pytest
 BuildRequires:  python3-mock
+BuildRequires:  python3-pyfakefs
+BuildRequires:  python3-ddt
 BuildRequires:  python3-devel
 BuildRequires:  python3-setuptools
 BuildRequires:  python3-productmd >= 1.23
@@ -115,8 +118,12 @@ rm %{buildroot}%{_bindir}/pungi
 # CLOUDLINUX: We don't need fedmsg stuff
 rm %{buildroot}%{_bindir}/%{name}-fedmsg-notification
 
-#%check
-#nosetests-3 --exe
+%check
+python3 -m pytest
+# master branch part of %check segment. Currently it doesn't work
+# because of pungi-koji requirement in bash tests
+#./tests/data/specs/build.sh
+#cd tests && ./test_compose.sh
 
 %files
 %license COPYING GPL
@@ -150,6 +157,7 @@ rm %{buildroot}%{_bindir}/%{name}-fedmsg-notification
 %{_bindir}/%{name}-compare-depsolving
 %{_bindir}/%{name}-wait-for-signed-ostree-handler
 
+
 %changelog
 * Thu Feb 11 2021 Stepan Oksanichenko <soksanichenko@cloudlinux.com> - 4.2.9-1
 - LNX-133: Create a server for building nightly builds of AlmaLinux

pungi/runroot.py

@@ -93,7 +93,7 @@ class Runroot(kobo.log.LoggingBase):
         log_file = os.path.join(log_dir, "program.log")
         try:
             with open(log_file) as f:
-                for line in f:
+                for line in f.readlines():
                     if "losetup: cannot find an unused loop device" in line:
                         return True
                     if re.match("losetup: .* failed to set up loop device", line):

setup.py

@@ -25,7 +25,7 @@ packages = sorted(packages)
 
 setup(
     name="pungi",
-    version="4.2.9",
+    version="4.2.10",
     description="Distribution compose tool",
     url="https://pagure.io/pungi",
     author="Dennis Gilmore",