fix: nav works for addons with no modules (#357)

addon/components/docs-viewer/x-autogenerated-api-docs/component.js

@@ -58,30 +58,33 @@ export default Component.extend({
     ```
   */
   moduleIndex: computed(function() {
-    let modules = this.get('sections').filter(section => section.type === 'modules')[0].items;
+    let modulesSection = this.get('sections').filter(section => section.type === 'modules')[0];
+
+    if (modulesSection) {
+      let modules = modulesSection.items;
 
-    /*
+      /*
       Intermediate data structure:
 
       ```
       {
-       '@ember-cli-addon-docs': {
-         'keyboard-config': {},
-         'router': {},
-         'utils': {
-           'compile-markdown': {}
-         }
-       }
+        '@ember-cli-addon-docs': {
+          'keyboard-config': {},
+          'router': {},
+          'utils': {
+            'compile-markdown': {}
+          }
+        }
       };
       ```
-    */
-    let index = {};
-    modules.forEach(module => {
-      let parts = module.id.split('/');
-      _set(index, parts, {});
-    });
+      */
+      let index = {};
+      modules.forEach(module => {
+        let parts = module.id.split('/');
+        _set(index, parts, {});
+      });
 
-    let transform = (obj, id) => Object.keys(obj)
+      let transform = (obj, id) => Object.keys(obj)
       .map(key => {
         let node = {
           name: key
@@ -96,7 +99,8 @@ export default Component.extend({
         return node;
       });
 
-    return transform(index)[0];
+      return transform(index)[0];
+    }
   })
 
 });

addon/components/docs-viewer/x-autogenerated-api-docs/template.hbs

@@ -9,8 +9,10 @@
     {{/each}}
   {{/each}}
 
-  {{docs-viewer/x-section 'Modules'}}
+  {{#if this.moduleIndex}}
+    {{docs-viewer/x-section 'Modules'}}
 
-  {{docs-viewer/x-autogenerated-api-docs/module-nav node=this.moduleIndex root=root}}
+    {{docs-viewer/x-autogenerated-api-docs/module-nav node=this.moduleIndex root=root}}
+  {{/if}}
 
 {{/if}}

test-apps/new-addon/addon/components/some-component.js

@@ -0,0 +1,12 @@
+import Component from '@ember/component';
+
+/**
+  An autodocumented component.
+
+  @class SomeComponent
+  @public
+*/
+export default Component.extend({
+
+
+});

test-apps/new-addon/package.json

@@ -24,6 +24,7 @@
   },
   "devDependencies": {
     "ember-cli-addon-docs": "*",
+    "ember-cli-addon-docs-yuidoc": "*",
     "broccoli-asset-rev": "*",
     "ember-cli": "*",
     "ember-cli-dependency-checker": "*",

test-apps/new-addon/tests/acceptance/sanity-checks-test.js

@@ -27,4 +27,10 @@ module('Acceptance | sanity checks test', function(hooks) {
       backgroundColor: 'rgb(40, 44, 52)'
     });
   });
+
+  test('the docs route & viewer render', async function(assert) {
+    await visit('/docs');
+
+    assert.dom().includesText('Overview');
+  });
 });

test-apps/new-addon/tests/dummy/app/templates/docs.hbs

@@ -0,0 +1,10 @@
+{{#docs-viewer as |viewer|}}
+  {{#viewer.nav as |nav|}}
+    {{nav.section 'Introduction'}}
+    {{nav.item 'Overview' 'docs.index'}}
+  {{/viewer.nav}}
+
+  {{#viewer.main}}
+    {{outlet}}
+  {{/viewer.main}}
+{{/docs-viewer}}

test-apps/new-addon/tests/dummy/app/templates/docs/index.md

@@ -0,0 +1,3 @@
+# Overview
+
+Hello, world.