Node acceptance tests, round 2

Author: dfreeman

.eslintrc.js

@@ -34,7 +34,7 @@ module.exports = {
       plugins: ['node'],
       rules: Object.assign({}, require('eslint-plugin-node').configs.recommended.rules, {
         // add your custom rules and overrides for node files here
-        'ember/avoid-leaking-state-in-ember-objects': 'off',
+        'ember/avoid-leaking-state-in-ember-objects': 'off'
       }),
     },
 
@@ -53,6 +53,9 @@ module.exports = {
       env: {
         mocha: true,
       },
+      rules: {
+        'node/no-unpublished-require': 'off'
+      }
     },
   ],
 };

node-tests/acceptance/build-test.js

@@ -0,0 +1,80 @@
+'use strict';
+
+const co = require('co');
+const SkeletonApp = require('../helpers/skeleton-app');
+const chai = require('ember-cli-blueprint-test-helpers/chai');
+const esprima = require('esprima');
+const expect = chai.expect;
+
+describe('Acceptance: build', function() {
+  this.timeout(30 * 1000);
+
+  beforeEach(function() {
+    this.app = new SkeletonApp();
+  });
+
+  afterEach(function() {
+    this.app.teardown();
+  });
+
+  it('builds and rebuilds files', co.wrap(function*() {
+    this.app.writeFile('app/app.ts', `
+      export function add(a: number, b: number) {
+        return a + b;
+      }
+    `);
+
+    let server = this.app.serve();
+
+    yield server.waitForBuild();
+
+    expectModuleBody(this.app, 'skeleton-app/app', `
+      exports.add = add;
+      function add(a, b) {
+        return a + b;
+      }
+    `);
+
+    this.app.writeFile('app/app.ts', `
+      export const foo: string = 'hello';
+    `);
+
+    yield server.waitForBuild();
+
+    expectModuleBody(this.app, 'skeleton-app/app', `
+      var foo = exports.foo = 'hello';
+    `);
+  }));
+});
+
+function extractModuleBody(script, moduleName) {
+  let parsed = esprima.parseScript(script);
+  let definition = parsed.body
+    .filter(stmt => stmt.type === 'ExpressionStatement')
+    .map(stmt => stmt.expression)
+    .find(expr =>
+        expr.type === 'CallExpression' &&
+        expr.callee.type === 'Identifier' &&
+        expr.callee.name === 'define' &&
+        expr.arguments &&
+        expr.arguments[0] &&
+        expr.arguments[0].type === 'Literal' &&
+        expr.arguments[0].value === moduleName);
+
+  let moduleDef = definition.arguments[2].body;
+
+  // Strip `'use strict'`
+  moduleDef.body.shift();
+
+  // Strip `__esModule` definition
+  moduleDef.body.shift();
+
+  return moduleDef;
+}
+
+function expectModuleBody(app, name, body) {
+  let src = app.readFile('dist/assets/skeleton-app.js');
+  let actual = extractModuleBody(src, name);
+  let expected = esprima.parseScript(body);
+  expect(actual.body).to.deep.equal(expected.body);
+}

node-tests/fixtures/skeleton-app/app/index.html

@@ -0,0 +1,9 @@
+/* eslint-env node */
+'use strict';
+
+module.exports = function(environment) {
+  return {
+    environment,
+    modulePrefix: 'skeleton-app'
+  };
+};

node-tests/fixtures/skeleton-app/app/styles/.gitkeep

@@ -0,0 +1,7 @@
+'use strict';
+
+const EmberApp = require('ember-cli/lib/broccoli/ember-app');
+
+module.exports = function(defaults) {
+  return new EmberApp(defaults, {}).toTree();
+};

node-tests/fixtures/skeleton-app/config/environment.js

@@ -0,0 +1,14 @@
+{
+  "name": "skeleton-app",
+  "devDependencies": {
+    "ember-cli": "*",
+    "ember-cli-htmlbars": "*",
+    "ember-cli-babel": "*",
+    "ember-source": "*",
+    "loader.js": "*",
+    "typescript": "*"
+  },
+  "ember-addon": {
+    "paths": [".."]
+  }
+}

node-tests/fixtures/skeleton-app/ember-cli-build.js

@@ -0,0 +1,15 @@
+{
+  "compilerOptions": {
+    "target": "ES6",
+    "allowJs": false,
+    "moduleResolution": "node",
+    "noEmitOnError": true,
+    "baseUrl": ".",
+    "paths": {
+      "skeleton-app/*": ["app/*"]
+    }
+  },
+  "include": [
+    "app"
+  ]
+}

node-tests/fixtures/skeleton-app/package.json

@@ -0,0 +1,79 @@
+'use strict';
+
+const fs = require('fs-extra');
+const mktemp = require('mktemp');
+const execa = require('execa');
+const EventEmitter = require('events').EventEmitter;
+
+module.exports = class SkeletonApp {
+  constructor() {
+    this._watched = null;
+    this.appDir = mktemp.createDirSync('test-skeleton-app-XXXXXX');
+    fs.copySync(`${__dirname}/../fixtures/skeleton-app`, this.appDir);
+  }
+
+  build() {
+    return this._ember(['build']);
+  }
+
+  serve() {
+    if (this._watched) {
+      throw new Error('Already serving');
+    }
+
+    return this._watched = new WatchedBuild(this._ember(['serve']));
+  }
+
+  writeFile(path, contents) {
+    fs.writeFileSync(`${this.appDir}/${path}`, contents, 'utf-8');
+  }
+
+  readFile(path) {
+    return fs.readFileSync(`${this.appDir}/${path}`, 'utf-8');
+  }
+
+  teardown() {
+    if (this._watched) {
+      this._watched.kill();
+    }
+
+    // Windows doesn't necessarily kill the process immediately, so
+    // leave a little time before trying to remove the directory.
+    setTimeout(() => {
+      try {
+        fs.removeSync(this.appDir);
+      } catch (error) {
+        // eslint-disable-next-line no-console
+        console.warn(`Warning: unable to remove skeleton-app tmpdir ${this.appDir} (${error.code})`);
+      }
+    }, 250);
+  }
+
+  _ember(args) {
+    let ember = require.resolve('ember-cli/bin/ember');
+    return execa('node', [ember].concat(args), { cwd: this.appDir });
+  }
+}
+
+class WatchedBuild extends EventEmitter {
+  constructor(ember) {
+    super();
+    this._ember = ember;
+    this._ember.stdout.on('data', (data) => {
+      let output = data.toString();
+      if (output.includes('Build successful')) {
+        this.emit('rebuild-complete');
+      }
+    });
+  }
+
+  waitForBuild() {
+    return new Promise((resolve) => {
+      this.once('rebuild-complete', resolve);
+    });
+  }
+
+  kill() {
+    this._ember.kill();
+  }
+}

node-tests/fixtures/skeleton-app/tsconfig.json

@@ -65,6 +65,7 @@
     "@types/node": "^9.6.5",
     "@types/qunit": "^2.0.31",
     "broccoli-asset-rev": "^2.6.0",
+    "co": "^4.6.0",
     "ember-cli": "~2.18.2",
     "ember-cli-app-version": "^3.1.3",
     "ember-cli-babel": "^6.6.0",
@@ -88,7 +89,9 @@
     "eslint": "^4.17.0",
     "eslint-plugin-ember": "^5.0.3",
     "eslint-plugin-node": "^6.0.0",
+    "esprima": "^4.0.0",
     "loader.js": "^4.2.3",
+    "mktemp": "^0.4.0",
     "mocha": "^5.0.0",
     "testdouble": "^3.5.0",
     "typescript": "^2.7.2"