Drop `BR: rubygem(json_pure)`.

rubygem-multi_json.spec

@@ -15,7 +15,6 @@ BuildRequires: ruby(release)
 BuildRequires: rubygems-devel >= 1.3.5
 BuildRequires: ruby
 BuildRequires: rubygem(rspec)
-BuildRequires: rubygem(json_pure)
 BuildArch: noarch
 # OkJson is allowed to be bundled:
 # https://fedorahosted.org/fpc/ticket/113
@@ -55,18 +54,23 @@ cp -a .%{gem_dir}/* \
 pushd .%{gem_instdir}
 ln -s %{_builddir}/spec spec
 
+# json_pures is not available on Fedora.
+sed -i "/require.*json\/pure/ s/^/#/" spec/multi_json_spec.rb
+sed -i "s/JsonPure/OkJson/" spec/multi_json_spec.rb
+sed -i "s/json_pure/ok_json/" spec/multi_json_spec.rb
 # oj is not available on Fedora.
 sed -i "/expect(MultiJson.adapter.to_s).to eq('MultiJson::Adapters::Oj')/ s/Oj/JsonGem/" spec/multi_json_spec.rb
 
 # Execute main test suite.
 SKIP_ADAPTERS=jr_jackson rspec spec/{multi_json,options_cache}_spec.rb
 
-#rm spec/{oj,yajl}_adapter_spec.rb
+# json_pure adapter does not support skipping :/
+mv spec/json_pure_adapter_spec.rb{,.disable}
 
 # Adapters have to be tested separately, but disable test of engines
 # unsupported on Fedora (they may cause test suite to fail).
 for adapter in spec/*_adapter_spec.rb; do
-  SKIP_ADAPTERS=gson,jr_jackson,nsjsonserialization,oj,yajl rspec $adapter
+  SKIP_ADAPTERS=json_pure,gson,jr_jackson,nsjsonserialization,oj,yajl rspec $adapter
 done
 
 popd
@@ -88,6 +92,7 @@ popd
 * Fri Nov 06 2020 Vít Ondruch <vondruch@redhat.com> - 1.15.0-1
 - Update to MultiJSON 1.15.0.
   Resolves: rhbz#1855521
+- Drop `BR: rubygem(json_pure)`.
 
 * Wed Jul 29 2020 Fedora Release Engineering <releng@fedoraproject.org> - 1.14.1-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild