[ios] Automatically fail any WebTest whose render process crashes.

ios/web/test/web_test_unittest.mm

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#import <UIKit/UIKit.h>

[Eugene But (OOO till 7-30), 2017/02/01 16:43:04]

nit: s/<UIKit/UIKit.h>/<WKWebKit/WKWebKit.h> ?
Looks like this file does not use anything from UIKit but uses WKWebView

[rohitrao (ping after 24h), 2017/02/01 18:23:00]

Done.

+
+#import "ios/web/public/test/fakes/test_web_view_content_view.h"
+#import "ios/web/test/web_test_with_web_controller.h"
+#import "ios/web/test/wk_web_view_crash_utils.h"
+#include "testing/gtest/include/gtest/gtest-spi.h"
+
+namespace {
+
+WKWebView* g_web_view = nil;

[Eugene But (OOO till 7-30), 2017/02/01 16:43:04]

Should |g_web_view| be a member of WebTestFixtureTest? Can you just call
|web::SimulateWKWebViewCrash(webView_);?

[rohitrao (ping after 24h), 2017/02/01 18:23:00]

I'm still fighting with gtest on this.  EXPECT_FATAL_FAILURE() does something
weird internally that's preventing me from using member variables.

Ok, looks like I can work around this by using a static local variable instead.

[Eugene But (OOO till 7-30), 2017/02/01 18:41:45]

Oh that's because they use local class, which can only access statics per C++
standard.

+
+void SimulateRenderProcessCrash() {
+  web::SimulateWKWebViewCrash(g_web_view);
+}
+
+// Fixture to test that the WebTest fixture properly fails tests when the render
+// process crashes.
+class WebTestFixtureTest : public web::WebTestWithWebController {
+ protected:
+  void SetUp() override {
+    web::WebTestWithWebController::SetUp();
+    webView_.reset([web::BuildTerminatedWKWebView() retain]);

[Eugene But (OOO till 7-30), 2017/02/01 16:43:04]

s/webView_/web_view_

[rohitrao (ping after 24h), 2017/02/01 18:23:00]

Done.

+    g_web_view = webView_;
+    base::scoped_nsobject<TestWebViewContentView> webViewContentView(

[Eugene But (OOO till 7-30), 2017/02/01 16:43:04]

s/webViewContentView/web_view_content_view

[rohitrao (ping after 24h), 2017/02/01 18:23:00]

Done.

+        [[TestWebViewContentView alloc]
+            initWithMockWebView:webView_
+                     scrollView:[webView_ scrollView]]);
+    [web_controller() injectWebViewContentView:webViewContentView];
+  }
+
+  void TearDown() override {
+    g_web_view = nil;
+    web::WebTestWithWebController::TearDown();
+  }
+
+  base::scoped_nsobject<WKWebView> webView_;
+};
+
+// Tests that WebStateDelegate::RenderProcessGone is called when WKWebView web
+// process has crashed.
+TEST_F(WebTestFixtureTest, FailsOnRenderCrash) {
+  EXPECT_FATAL_FAILURE(SimulateRenderProcessCrash(),
+                       "Renderer process died unexpectedly");
+};
+
+TEST_F(WebTestFixtureTest, SucceedsOnRenderCrash) {

[Eugene But (OOO till 7-30), 2017/02/01 16:43:04]

Please add comments

[rohitrao (ping after 24h), 2017/02/01 18:23:00]

Done.

+  AllowRenderProcessCrashesDuringTesting(true);
+  SimulateRenderProcessCrash();
+};
+
+}  // namespace