diff --git a/.gitignore b/.gitignore
index e69de29..68c4241 100644
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1,8 @@
+/results_*
+/*.src.rpm
+
+/assertj-core-2.2.0.tar.gz
+/assertj-core-3.8.0.tar.gz
+/assertj-core-3.15.0.tar.gz
+/assertj-core-3.16.1.tar.gz
+/assertj-core-3.17.0.tar.gz
diff --git a/assertj-core.spec b/assertj-core.spec
new file mode 100644
index 0000000..0339584
--- /dev/null
+++ b/assertj-core.spec
@@ -0,0 +1,134 @@
+%bcond_with memoryfilesystem
+
+Name:           assertj-core
+Version:        3.17.0
+Release:        1%{?dist}
+Summary:        Library of assertions similar to fest-assert
+License:        ASL 2.0
+
+URL:            https://joel-costigliola.github.io/assertj/
+Source0:        https://github.com/joel-costigliola/assertj-core/archive/assertj-core-%{version}.tar.gz
+
+BuildArch:      noarch
+
+BuildRequires:  maven-local
+BuildRequires:  mvn(junit:junit)
+BuildRequires:  mvn(net.bytebuddy:byte-buddy)
+BuildRequires:  mvn(org.hamcrest:hamcrest)
+BuildRequires:  mvn(org.junit.jupiter:junit-jupiter-api)
+BuildRequires:  mvn(org.opentest4j:opentest4j)
+
+%if %{with memoryfilesystem}
+BuildRequires:  mvn(com.github.marschall:memoryfilesystem)
+%endif
+
+%description
+A rich and intuitive set of strongly-typed assertions to use for unit testing
+(either with JUnit or TestNG).
+
+
+%package javadoc
+Summary:        API documentation for %{name}
+
+%description javadoc
+This package provides API documentation for %{name}.
+
+
+%prep
+%setup -q -n %{name}-%{name}-%{version}
+
+# remove dependency on parent POM and inject groupId instead
+%pom_remove_parent
+%pom_xpath_inject "pom:project" "<groupId>org.assertj</groupId>"
+
+# remove plugins that are unnecessary for RPM builds
+%pom_remove_plugin :bnd-maven-plugin
+%pom_remove_plugin :bnd-resolver-maven-plugin
+%pom_remove_plugin :jacoco-maven-plugin
+%pom_remove_plugin :maven-antrun-plugin
+%pom_remove_plugin :maven-dependency-plugin
+%pom_remove_plugin :maven-enforcer-plugin
+%pom_remove_plugin :maven-jar-plugin
+%pom_remove_plugin :maven-javadoc-plugin
+%pom_remove_plugin :maven-shade-plugin
+%pom_remove_plugin :yuicompressor-maven-plugin
+%pom_xpath_remove pom:project/pom:profiles
+
+%if %{without memoryfilesystem}
+%pom_remove_dep :memoryfilesystem
+rm -r src/test/java/org/assertj/core/internal/{Paths*.java,paths}
+%endif
+
+
+%build
+# dependencies for tests are not packaged for fedora:
+# - nl.jqno.equalsverifier:equalsverifier
+%mvn_build -f -- -Dproject.build.sourceEncoding=UTF-8
+
+
+%install
+%mvn_install
+
+
+%files -f .mfiles
+%doc README.md CONTRIBUTING.md
+%license LICENSE.txt
+
+%files javadoc -f .mfiles-javadoc
+%doc CONTRIBUTING.md
+%license LICENSE.txt
+
+
+%changelog
+* Sun Aug 23 2020 Fabio Valentini <decathorpe@gmail.com> - 3.17.0-1
+- Update to version 3.17.0.
+
+* Mon Jul 27 2020 Fedora Release Engineering <releng@fedoraproject.org> - 3.16.1-5
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild
+
+* Tue Jul 21 2020 Markku Korkeala <markku.korkeala@iki.fi> - 3.16.1-4
+- Remove profiles from pom.xml.
+
+* Fri Jul 10 2020 Jiri Vanek <jvanek@redhat.com> - 3.16.1-3
+- Rebuilt for JDK-11, see https://fedoraproject.org/wiki/Changes/Java11
+
+* Wed May 13 2020 Fabio Valentini <decathorpe@gmail.com> - 3.16.1-2
+- Fix artifact generation by removing antrun plugin again.
+
+* Tue May 12 2020 Fabio Valentini <decathorpe@gmail.com> - 3.16.1-1
+- Update to version 3.16.1.
+
+* Tue Jan 28 2020 Fedora Release Engineering <releng@fedoraproject.org> - 3.8.0-7
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_32_Mass_Rebuild
+
+* Fri Sep 13 2019 Fabio Valentini <decathorpe@gmail.com> - 3.8.0-6
+- Remove dependency on memoryfilesystem.
+
+* Wed Jul 24 2019 Fedora Release Engineering <releng@fedoraproject.org> - 3.8.0-5
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild
+
+* Thu Jan 31 2019 Fedora Release Engineering <releng@fedoraproject.org> - 3.8.0-4
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild
+
+* Thu Jul 12 2018 Fedora Release Engineering <releng@fedoraproject.org> - 3.8.0-3
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild
+
+* Wed Feb 07 2018 Fedora Release Engineering <releng@fedoraproject.org> - 3.8.0-2
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild
+
+* Fri Jul 28 2017 Mat Booth <mat.booth@redhat.com> - 3.8.0-1
+- Update to latest version of assertj
+- Disable tests due to missing deps in Fedora
+
+* Wed Jul 26 2017 Fedora Release Engineering <releng@fedoraproject.org> - 2.2.0-4
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Mass_Rebuild
+
+* Mon Feb 06 2017 Michael Simacek <msimacek@redhat.com> - 2.2.0-3
+- Add conditional for memoryfilesystem
+
+* Wed Feb 03 2016 Fedora Release Engineering <releng@fedoraproject.org> - 2.2.0-2
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_24_Mass_Rebuild
+
+* Wed Sep 02 2015 Roman Mohr <roman@fenkhuber.at> - 2.2.0-1
+- Initial packaging
+
diff --git a/sources b/sources
new file mode 100644
index 0000000..9da6b1d
--- /dev/null
+++ b/sources
@@ -0,0 +1 @@
+SHA512 (assertj-core-3.17.0.tar.gz) = 03a6448ed8c1110c6883df808c8fb9d9912c61edebfb573d3d96fc22a78a8267be4220f96c741d651277beb0a14b8f3ee08d6bddb550e8895ca8fae9c3e32c67