fix(suggestions) handle null data (#144)

Fixes #124

__tests__/__snapshots__/autosuggest.test.js.snap

@@ -51,6 +51,14 @@ exports[`Autosuggest can display section header 1`] = `
 </div>
 `;
 
+exports[`Autosuggest can handle null data 1`] = `
+<div id="autosuggest"><input type="text" autocomplete="off" role="combobox" aria-autocomplete="list" aria-owns="autosuggest__results" aria-activedescendant="" aria-haspopup="false" aria-expanded="false" id="autosuggest__input" placeholder="Type 'G'">
+  <div class="autosuggest__results-container">
+    <!---->
+  </div>
+</div>
+`;
+
 exports[`Autosuggest can modify input type attribute 1`] = `
 <div id="autosuggest"><input type="search" autocomplete="off" role="combobox" aria-autocomplete="list" aria-owns="autosuggest__results" aria-activedescendant="" aria-haspopup="false" aria-expanded="false" id="autosuggest__input" placeholder="Type 'G'">
   <div class="autosuggest__results-container">

__tests__/autosuggest.test.js

@@ -703,4 +703,18 @@ describe("Autosuggest", () => {
     wrapper.setData({ ph: 'Please type here...' })
     expect(input.attributes("placeholder")).toBe('Please type here...')
   });
+
+  it("can handle null data", async () => {
+    const props = {...defaultProps, suggestions: [{ data: null }]};
+
+    const wrapper = shallowMount(Autosuggest, {
+      propsData: props
+    });
+
+    const renderer = createRenderer();
+    renderer.renderToString(wrapper.vm, (err, str) => {
+      if (err) throw new Error(err);
+      expect(str).toMatchSnapshot();
+    });
+  });
 });

src/Autosuggest.vue

@@ -282,6 +282,7 @@ export default {
         // For each section, make sure we calculate the size
         // based on how many are rendered, which maxes out at
         // the limit but can be less than the limit.
+        if (!section) return acc
         const { limit, data } = section
         return acc + (data.length >= limit ? limit : data.length)
       }, 0)