Earlgrey test for webScenarioBrowsingLinkPreventDefaultOverridesHref

ios/web/shell/test/web_shell_navigation_egtest.mm

Index: ios/web/shell/test/web_shell_navigation_egtest.mm
diff --git a/ios/web/shell/test/web_shell_navigation_egtest.mm b/ios/web/shell/test/web_shell_navigation_egtest.mm
index e3a58281a5b9764af9cfc3d648af87073c3298d2..7646dfa8c000ca96499c5b05dd1b41e61b9dae83 100644
--- a/ios/web/shell/test/web_shell_navigation_egtest.mm
+++ b/ios/web/shell/test/web_shell_navigation_egtest.mm
@@ -8,6 +8,7 @@
 
 #import <EarlGrey/EarlGrey.h>
 
+#include "base/strings/stringprintf.h"
 #include "base/strings/sys_string_conversions.h"
 #import "ios/web/public/test/http_server.h"
 #include "ios/web/public/test/http_server_util.h"
@@ -139,4 +140,33 @@
       assertWithMatcher:grey_notNil()];
 }
 
+// Tests tapping a link with onclick="event.preventDefault()" and verifies that
+// the URL didn't change..
+- (void)testNavigationLinkPreventDefaultOverridesHref {
+  // Create map of canned responses and set up the test HTML server.
+  std::map<GURL, std::string> responses;
+  const GURL URL = web::test::HttpServer::MakeUrl("http://overridesHrefLink");
+  const GURL destURL = web::test::HttpServer::MakeUrl("http://destination");
+
+  const std::string response = base::StringPrintf(
+      "<a href='%s' id='overrides-href' "
+      "onclick='event.preventDefault()'>redirectLink</a>",
+      destURL.spec().c_str());
+  responses[URL] = response;
+  std::string destResponse = "You're here!";
+  responses[destURL] = destResponse;
+
+  web::test::SetUpSimpleHttpServer(responses);
+  web::shell_test_util::LoadUrl(URL);
+  [[EarlGrey selectElementWithMatcher:web::addressFieldText(URL.spec())]
+      assertWithMatcher:grey_notNil()];
+
+  web::shell_test_util::TapWebViewElementWithId("overrides-href");
+
+  [[EarlGrey selectElementWithMatcher:web::addressFieldText(URL.spec())]
+      assertWithMatcher:grey_notNil()];
+  [[EarlGrey selectElementWithMatcher:web::webViewContainingText(destResponse)]
+      assertWithMatcher:grey_nil()];
+}
+
 @end