Don't fail on addons without any API items

.npmignore

@@ -22,3 +22,5 @@ testem.js
 .node_modules.ember-try/
 bower.json.ember-try
 package.json.ember-try
+
+/test-apps

.travis.yml

@@ -37,6 +37,8 @@ jobs:
       script: yarn test:browser
     - env: NAME=node tests
       script: yarn test:node
+    - env: NAME=test-apps tests
+      script: yarn test:test-apps
 
     - stage: floating dependencies
       env: NAME=browser tests
@@ -45,6 +47,9 @@ jobs:
     - env: NAME=node tests
       install: yarn install --no-lockfile --non-interactive
       script: yarn test:node
+    - env: NAME=test-apps tests
+      install: yarn install --no-lockfile --non-interactive
+      script: yarn test:test-apps
 
     - stage: versioned tests
       env: EMBER_TRY_SCENARIO=ember-lts-2.8

lib/broccoli/search-indexer.js

@@ -84,7 +84,9 @@ module.exports = class SearchIndexCompiler extends Writer {
 
   *buildApiItemDocuments(filePath) {
     let projectVersionDoc = fs.readJsonSync(filePath, 'utf-8');
-    for (let item of projectVersionDoc.included) {
+    let apiItems = projectVersionDoc.included || [];
+
+    for (let item of apiItems) {
       if (item.type === 'module') {
         yield this.buildModuleDocument(item);
       } else if (item.type === 'component') {

package.json

@@ -18,8 +18,10 @@
     "lint:js": "eslint .",
     "start": "ember serve",
     "test": "ember try:each",
+    "test:browser": "ember test --test-port=0",
     "test:node": "qunit tests-node",
-    "test:browser": "ember test"
+    "test:test-apps": "cd test-apps/new-addon && yarn test",
+    "prepare": "./scripts/link-them.sh"
   },
   "dependencies": {
     "@glimmer/syntax": "^0.30.5",

scripts/link-them.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+# Copied from https://github.com/ef4/ember-auto-import/blob/master/scripts/link-them.sh
+
+set -e
+
+# All packages get a node_modules directory and a .bin link
+for package in "new-addon"; do
+    mkdir -p ./test-apps/$package/node_modules
+    pushd ./test-apps/$package/node_modules > /dev/null
+    rm -rf .bin
+    ln -s ../../../node_modules/.bin .bin
+    popd > /dev/null
+done
+
+# These packages get to depend on ember-cli-addon-docs
+for package in "new-addon"; do
+    pushd ./test-apps/$package/node_modules > /dev/null
+    rm -rf ./ember-cli-addon-docs
+    ln -s ../../.. ./ember-cli-addon-docs
+    popd > /dev/null
+done