Started to add a test

spec/integrations/vicmd_partial_accept_spec.rb

@@ -0,0 +1,19 @@
+describe 'a vicmd mode partial-accept widget' do
+  let(:widget) { 'vi-forward-word-end' }
+
+  context 'in vicmd mode' do
+#    -> do
+#      let(:before_sourcing) do
+#        session.
+#      end
+#    end
+
+    it 'moves the cursor through suggestion as expected' do
+      session.run_command("bindkey s vi-cmd-mode")
+      with_history('foobar foo') do
+        session.send_string('fo').send_keys('s').send_keys('e')
+        wait_for { session.content }.to eq('foobar')
+      end
+    end
+  end
+end