Add minimal test framework

This patch adds some minimal tests for puppeteer's Page using
Jasmine.

README.md

@@ -30,7 +30,17 @@ node examples/screenshot.js
 
 ### Tests
 
+Run all tests:
+```
+npm test
+```
+
 Run phantom.js tests using puppeteer:
 ```
-./third_party/phantomjs/test/run-tests.py
+npm run test-phantom
+```
+
+Run puppeteer tests:
+```
+npm run test-puppeteer
 ```

package.json

@@ -4,7 +4,9 @@
   "description": "",
   "main": "index.js",
   "scripts": {
-    "test": "python third_party/phantomjs/test/run-tests.py",
+    "test-puppeteer": "jasmine test/test.js",
+    "test-phantom": "python third_party/phantomjs/test/run-tests.py",
+    "test": "npm run test-puppeteer && npm run test-phantom",
     "install": "node install.js"
   },
   "author": "The Chromium Authors",
@@ -24,5 +26,8 @@
   },
   "puppeteer": {
     "chromium_revision": "468266"
+  },
+  "devDependencies": {
+    "jasmine": "^2.6.0"
   }
 }

test/test.js

@@ -0,0 +1,38 @@
+var Browser = require('../lib/Browser');
+
+describe('Page', function() {
+    var browser;
+    var page;
+
+    beforeAll(function() {
+        browser = new Browser();
+    });
+
+    afterAll(function() {
+        browser.close();
+    });
+
+    beforeEach(SX(async function() {
+        page = await browser.newPage();
+    }));
+
+    afterEach(function() {
+        page.close();
+    });
+
+    it('Page.evaluate', SX(async function() {
+        var result = await page.evaluate(() => 7 * 3);
+        expect(result).toBe(21);
+    }));
+
+    it('Page.evaluateAsync', SX(async function() {
+        var result = await page.evaluateAsync(() => Promise.resolve(8 * 7));
+        expect(result).toBe(56);
+    }));
+});
+
+// Since Jasmine doesn't like async functions, they should be wrapped
+// in a SX function.
+function SX(fun) {
+    return done => Promise.resolve(fun()).then(done).catch(done.fail);
+}