test(firefox): add puppeteer-firefox unique evaluation tests (#3891)

References #3889

experimental/puppeteer-firefox/test/evaluation.spec.js

@@ -132,7 +132,7 @@ module.exports.addTests = function({testRunner, expect, product}) {
       await page.goto(server.PREFIX + '/global-var.html');
       expect(await page.evaluate('globalVar')).toBe(123);
     });
-    it('should use the same sandbox', async({page}) => {
+    it('should modify global environment', async({page}) => {
       await page.evaluate(() => window.globalVar = 123);
       expect(await page.evaluate('globalVar')).toBe(123);
     });

test/assets/global-var.html

@@ -0,0 +1,3 @@
+<script>
+var globalVar = 123;
+</script>

test/evaluation.spec.js

@@ -23,7 +23,7 @@ try {
   asyncawait = false;
 }
 
-module.exports.addTests = function({testRunner, expect}) {
+module.exports.addTests = function({testRunner, expect, FFOX}) {
   const {describe, xdescribe, fdescribe} = testRunner;
   const {it, fit, xit} = testRunner;
   const {beforeAll, beforeEach, afterAll, afterEach} = testRunner;
@@ -33,6 +33,41 @@ module.exports.addTests = function({testRunner, expect}) {
       const result = await page.evaluate(() => 7 * 3);
       expect(result).toBe(21);
     });
+    it('should transfer NaN', async({page, server}) => {
+      const result = await page.evaluate(a => a, NaN);
+      expect(Object.is(result, NaN)).toBe(true);
+    });
+    it('should transfer -0', async({page, server}) => {
+      const result = await page.evaluate(a => a, -0);
+      expect(Object.is(result, -0)).toBe(true);
+    });
+    it('should transfer Infinity', async({page, server}) => {
+      const result = await page.evaluate(a => a, Infinity);
+      expect(Object.is(result, Infinity)).toBe(true);
+    });
+    it('should transfer -Infinity', async({page, server}) => {
+      const result = await page.evaluate(a => a, -Infinity);
+      expect(Object.is(result, -Infinity)).toBe(true);
+    });
+    it('should transfer arrays', async({page, server}) => {
+      const result = await page.evaluate(a => a, [1, 2, 3]);
+      expect(result).toEqual([1,2,3]);
+    });
+    it('should transfer arrays as arrays, not objects', async({page, server}) => {
+      const result = await page.evaluate(a => Array.isArray(a), [1, 2, 3]);
+      expect(result).toBe(true);
+    });
+    it('should modify global environment', async({page}) => {
+      await page.evaluate(() => window.globalVar = 123);
+      expect(await page.evaluate('globalVar')).toBe(123);
+    });
+    it('should evaluate in the page context', async({page, server}) => {
+      await page.goto(server.PREFIX + '/global-var.html');
+      expect(await page.evaluate('globalVar')).toBe(123);
+    });
+    (FFOX ? xit : it)('should return undefined for objects with symbols', async({page, server}) => {
+      expect(await page.evaluate(() => [Symbol('foo4')])).toBe(undefined);
+    });
     (asyncawait ? it : xit)('should work with function shorthands', async({page, server}) => {
       // trick node6 transpiler to not touch our object.
       // TODO(lushnikov): remove eval once Node6 is dropped.
@@ -227,6 +262,12 @@ module.exports.addTests = function({testRunner, expect}) {
       expect(await page.frames()[0].evaluate(() => window.FOO)).toBe('foo');
       expect(await page.frames()[1].evaluate(() => window.FOO)).toBe('bar');
     });
+    it('should have correct execution contexts', async({page, server}) => {
+      await page.goto(server.PREFIX + '/frames/one-frame.html');
+      expect(page.frames().length).toBe(2);
+      expect(await page.frames()[0].evaluate(() => document.body.textContent.trim())).toBe('');
+      expect(await page.frames()[1].evaluate(() => document.body.textContent.trim())).toBe(`Hi, I'm frame`);
+    });
     it('should execute after cross-site navigation', async({page, server}) => {
       await page.goto(server.EMPTY_PAGE);
       const mainFrame = page.mainFrame();