Add spec for #check_plugin_version_from_changelog

Author: rastating

spec/wordpress/fingerprint_spec.rb

@@ -96,6 +96,65 @@
     end
   end
 
+  describe '#check_plugin_version_from_changelog' do
+    let(:body) do
+      '== Change Log ==
+
+      = 1.2 =
+      * 1.2 notes
+
+      = 1.1 =
+      * 1.1 notes
+
+      = 1.0 =
+      * First release.'
+    end
+
+    context 'when all versions of the plugin are vulnerable' do
+      it 'returns :vulnerable' do
+        expect(subject.check_plugin_version_from_changelog('a', 'a')).to eq :vulnerable
+      end
+    end
+
+    context 'when all versions after a specific version are vulnerable' do
+      it 'returns :vulnerable if the version is later than introduced' do
+        introduced = '1.0'
+        state = subject.check_plugin_version_from_changelog('a', 'a', nil, introduced)
+        expect(state).to eq :vulnerable
+      end
+
+      it 'returns :safe if the version is earlier than introduced' do
+        introduced = '1.3'
+        state = subject.check_plugin_version_from_changelog('a', 'a', nil, introduced)
+        expect(state).to eq :safe
+      end
+
+      it 'returns :vulnerable if the version is the same as introduced' do
+        introduced = '1.2'
+        state = subject.check_plugin_version_from_changelog('a', 'a', nil, introduced)
+        expect(state).to eq :vulnerable
+      end
+    end
+
+    context 'when a specifc range of versions are vulnerable' do
+      it 'returns :vulnerable if the version is in the vulnerable range' do
+        state = subject.check_plugin_version_from_changelog('a', 'a', '2.0', '1.0')
+        expect(state).to eq :vulnerable
+
+        state = subject.check_plugin_version_from_changelog('a', 'a', '2.0', '1.2')
+        expect(state).to eq :vulnerable
+      end
+
+      it 'returns :safe if the version is outside the vulnerable range' do
+        state = subject.check_plugin_version_from_changelog('a', 'a', nil, '1.3')
+        expect(state).to eq :safe
+
+        state = subject.check_plugin_version_from_changelog('a', 'a', '1.2', '1.0')
+        expect(state).to eq :safe
+      end
+    end
+  end
+
   describe '#check_theme_version_from_readme' do
     let(:body) do
       'Requires at least: 3.1