tests

piuccio · Jun 26, 2017 · 068e5dd · 068e5dd
1 parent f0598d3
commit 068e5dd
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Showing 4 changed files with 18 additions and 5 deletions.
diff --git a/__tests__/.eslintrc.json b/__tests__/.eslintrc.json
@@ -0,0 +1,5 @@
+{
+  "env": {
+    "jest": true
+  }
+}
diff --git a/__tests__/prerender.test.js b/__tests__/prerender.test.js
@@ -0,0 +1,7 @@
+const render = require('../index');
+
+describe('Pre-renderer', () => {
+  it('pre-renders a web page', () => {
+    return expect(render('https://google.com')).resolves.toMatch(/google/i);
+  });
+});
diff --git a/index.js b/index.js
@@ -26,20 +26,20 @@ module.exports = function (source, chromeFlags) {
       () => chrome.kill()
     );
   })
-  .then((results) => results.find(r => r.extractedHTML).extractedHTML);
+  .then((results) => results.find(r => r && r.extractedHTML).extractedHTML);
 }
 
 function extractHtml(evaluatedCode) {
   return { extractedHTML: `<!doctype html>${evaluatedCode.result.value}` };
 }
 
 function launchChrome(url, flags) {
-  debug('Launching Chrome headless');
+  debug('Launching Chrome headless for url "%s"', url);
   const chromeFlags = [
     '--disable-gpu',
     '--headless',
-  ].concat(flags);
-  debug('Chrome flags: %s', chromeFlags.join(' '));
+  ].concat(flags).filter(Boolean);
+  debug('Chrome flags: %s', chromeFlags);
 
   return chromeLauncher.launch({
     startingUrl: url,

diff --git a/package.json b/package.json
@@ -17,7 +17,8 @@
   },
   "scripts": {
     "lint": "eslint index.js",
-    "test": "jest"
+    "test": "jest",
+    "test:watch": "DEBUG=prerender jest --watchAll"
   },
   "dependencies": {
     "chrome-launcher": "^0.2.1",