fix(CTooltip): tooltip shows up on title update

Author: xidedix

src/directives/CTooltip.js

@@ -48,12 +48,10 @@ export default {
             </div>`
   },
   update(el, binding, vnode) {
-    if (binding.value.content !== binding.oldValue.content  && el === vnode.elm) {
-      el._c_tooltip.hide()
+    if ((binding.value.content !== binding.oldValue.content)  && el === vnode.elm) {
       vnode.context.$nextTick(() => {
         const title = binding.value.content
         el._c_tooltip.updateTitleContent(title)
-        el._c_tooltip.show()
       })
     }
   }

src/directives/tests/CTooltip.spec.js

@@ -46,7 +46,8 @@ const generateWrapper = (config) => {
       directives: { CTooltip },
       data () {
         return {
-          button: true
+          button: true,
+          title: 'tooltip 1'
         }
       },
       mounted () {
@@ -85,6 +86,23 @@ describe(ComponentName, () => {
     expect(tooltipWrapper.find('.tooltip-old').isVisible()).toBe(true)
   })
 
+  it('should update title content', done => {
+    // todo
+    const updatedContent = 'Updated tooltip';
+    const wrapper = tooltipWrapper.find('button')
+    const instance = wrapper.element._c_tooltip;
+    expect(
+      tooltipWrapper.find('.tooltip-old .tooltip-old-inner').element.textContent
+    ).toBe('tooltip');
+    instance.updateTitleContent(updatedContent);
+    instance.show();
+    expect(
+      tooltipWrapper.find('.tooltip-old .tooltip-old-inner').element.textContent
+    ).toBe(updatedContent);
+    instance.hide();
+    done();
+  });
+
   it('destroys correctly', (done) => {
     setTimeout(() => {
       expect(tooltipWrapper.find('.btn').exists()).not.toBe(true)