From 592dca91969f2c1389752d4d09857fa74c9c82fb Mon Sep 17 00:00:00 2001
From: Sam Zhou <sam@developersam.com>
Date: Mon, 22 Jun 2020 05:32:22 -0400
Subject: [PATCH] chore(v2): Implement a simple E2E testing mechanism for
 `docusausus start` (#2950)

* chore(v2): Implement a simple E2E testing mechanism for `docusausus start`

* Detect compiler errors
---
 .github/workflows/e2e-test.yml            |  4 ++++
 packages/docusaurus/src/commands/start.ts | 10 ++++++++++
 2 files changed, 14 insertions(+)

diff --git a/.github/workflows/e2e-test.yml b/.github/workflows/e2e-test.yml
index 3e8d666633..5c84da46cc 100644
--- a/.github/workflows/e2e-test.yml
+++ b/.github/workflows/e2e-test.yml
@@ -26,6 +26,10 @@ jobs:
         run: yarn
       - name: Setup test-website project against master release
         run: yarn test:build:v2
+      - name: Start test-website project
+        run: cd test-website && yarn start --no-open
+        env:
+          E2E_TEST: true
       - name: Build test-website project
         run: cd test-website && yarn build
         env:
diff --git a/packages/docusaurus/src/commands/start.ts b/packages/docusaurus/src/commands/start.ts
index 2c34ab05b2..b3433cfe74 100644
--- a/packages/docusaurus/src/commands/start.ts
+++ b/packages/docusaurus/src/commands/start.ts
@@ -165,6 +165,16 @@ export default async function start(
     ...config.devServer,
   };
   const compiler = webpack(config);
+  if (process.env.E2E_TEST) {
+    compiler.hooks.done.tap('done', (stats) => {
+      if (stats.hasErrors()) {
+        console.log('E2E_TEST: Project has compiler errors.');
+        process.exit(1);
+      }
+      console.log('E2E_TEST: Project can compile.');
+      process.exit(0);
+    });
+  }
   const devServer = new WebpackDevServer(compiler, devServerConfig);
   devServer.listen(port, host, (err) => {
     if (err) {