feat: defined the dependency on prettier

closes #3

Author: travi

src/canary-test.js

@@ -0,0 +1,11 @@
+import {assert} from 'chai';
+
+import scaffold from './scaffolder';
+
+suite('scaffolder', () => {
+  test('that prettier is scaffolded', async () => {
+    const {devDependencies} = await scaffold();
+
+    assert.deepEqual(devDependencies, ['prettier']);
+  });
+});

src/scaffolder-test.js

@@ -1,3 +1,3 @@
 export default function () {
-  return undefined;
+  return {devDependencies: ['prettier']};
 }

src/scaffolder.js

@@ -2,3 +2,4 @@ Feature: Scaffolder
 
   Scenario: Scaffold
     When the project is scaffolded
+    Then the dependencies are defined

test/integration/features/scaffolder.feature

@@ -19,5 +19,5 @@ When('the project is scaffolded', async function () {
     node_modules: stubbedNodeModules
   });
 
-  await scaffold({projectRoot: process.cwd()});
+  this.scaffoldResult = await scaffold({projectRoot: process.cwd()});
 });

test/integration/features/step_definitions/common-steps.mjs

@@ -0,0 +1,8 @@
+import {Then} from '@cucumber/cucumber';
+import {assert} from 'chai';
+
+Then('the dependencies are defined', async function () {
+  const {devDependencies} = this.scaffoldResult;
+
+  assert.include(devDependencies, 'prettier');
+});