Add helpers to swipe up and down on the current web view.

ios/chrome/browser/ui/fullscreen_egtest.mm

 // Copyright 2016 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 <EarlGrey/EarlGrey.h>
 #import <UIKit/UIKit.h>
 #import <XCTest/XCTest.h>
 
 #include "base/ios/ios_util.h"
 #include "base/mac/bind_objc_block.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #import "ios/chrome/browser/ui/toolbar/toolbar_controller.h"
 #import "ios/chrome/test/app/chrome_test_util.h"
 #import "ios/chrome/test/app/settings_test_util.h"
 #import "ios/chrome/test/app/web_view_interaction_test_util.h"
 #include "ios/chrome/test/earl_grey/chrome_assertions.h"
 #import "ios/chrome/test/earl_grey/chrome_earl_grey.h"
+#import "ios/chrome/test/earl_grey/chrome_earl_grey_ui.h"
 #import "ios/chrome/test/earl_grey/chrome_matchers.h"
 #import "ios/chrome/test/earl_grey/chrome_test_case.h"
 #import "ios/chrome/test/earl_grey/chrome_util.h"
 #import "ios/testing/wait_util.h"
 #import "ios/web/public/test/earl_grey/web_view_matchers.h"
 #import "ios/web/public/test/http_server.h"
 #import "ios/web/public/test/http_server_util.h"
 #import "ios/web/public/test/response_providers/error_page_response_provider.h"
 #import "ios/web/public/test/web_view_interaction_test_util.h"
 #include "url/gurl.h"
@@ skipping 15 matching lines @@
   DescribeToBlock describe = ^(id<GREYDescription> description) {
     [description appendText:@"contentOffset"];
   };
   return grey_allOf(
       grey_kindOfClass([UIScrollView class]),
       [[GREYElementMatcherBlock alloc] initWithMatchesBlock:matches
                                            descriptionBlock:describe],
       nil);
 }
 
-// Hides the toolbar by scrolling down.
-void HideToolbarUsingUI() {
-  [[EarlGrey
-      selectElementWithMatcher:WebViewScrollView(
-                                   chrome_test_util::GetCurrentWebState())]
-      performAction:grey_swipeFastInDirection(kGREYDirectionUp)];
-}
-
 // Asserts that the current URL is the |expectedURL| one.
 void AssertURLIs(const GURL& expectedURL) {
   NSString* description = [NSString
       stringWithFormat:@"Timeout waiting for the url to be %@",
                        base::SysUTF8ToNSString(expectedURL.GetContent())];
 
   ConditionBlock condition = ^{
     NSError* error = nil;
     [[EarlGrey selectElementWithMatcher:chrome_test_util::OmniboxText(
                                             expectedURL.GetContent())]
@@ skipping 45 matching lines @@
 
 // Verifies that the toolbar properly appears/disappears when scrolling up/down
 // on a PDF that is short in length and wide in width.
 - (void)testSmallWidePDFScroll {
   web::test::SetUpFileBasedHttpServer();
   GURL URL = web::test::HttpServer::MakeUrl(
       "http://ios/testing/data/http_server_files/single_page_wide.pdf");
   [ChromeEarlGrey loadURL:URL];
 
   // Test that the toolbar is still visible after a user swipes down.
-  [[EarlGrey
-      selectElementWithMatcher:WebViewScrollView(
-                                   chrome_test_util::GetCurrentWebState())]
-      performAction:grey_swipeFastInDirection(kGREYDirectionDown)];
+  [ChromeEarlGreyUI swipeDownOnWebView];
   chrome_test_util::AssertToolbarVisible();
 
   // Test that the toolbar is no longer visible after a user swipes up.
-  HideToolbarUsingUI();
+  [ChromeEarlGreyUI swipeUpOnWebView];
   chrome_test_util::AssertToolbarNotVisible();
 }
 
 // Verifies that the toolbar properly appears/disappears when scrolling up/down
 // on a PDF that is long in length and wide in width.
 - (void)testLongPDFScroll {
   web::test::SetUpFileBasedHttpServer();
   GURL URL = web::test::HttpServer::MakeUrl(
       "http://ios/testing/data/http_server_files/two_pages.pdf");
   [ChromeEarlGrey loadURL:URL];
 
   // Test that the toolbar is hidden after a user swipes up.
-  HideToolbarUsingUI();
+  [ChromeEarlGreyUI swipeUpOnWebView];
   chrome_test_util::AssertToolbarNotVisible();
 
   // Test that the toolbar is visible after a user swipes down.
-  [[EarlGrey
-      selectElementWithMatcher:WebViewScrollView(
-                                   chrome_test_util::GetCurrentWebState())]
-      performAction:grey_swipeFastInDirection(kGREYDirectionDown)];
+  [ChromeEarlGreyUI swipeDownOnWebView];
   chrome_test_util::AssertToolbarVisible();
 
   // Test that the toolbar is hidden after a user swipes up.
-  HideToolbarUsingUI();
+  [ChromeEarlGreyUI swipeUpOnWebView];
   chrome_test_util::AssertToolbarNotVisible();
 }
 
 // Tests that link clicks from a chrome:// to chrome:// link result in the
 // header being shown even if was not previously shown.
 - (void)testChromeToChromeURLKeepsHeaderOnScreen {
   const GURL kChromeAboutURL("chrome://chrome-urls");
   [ChromeEarlGrey loadURL:kChromeAboutURL];
 
   AssertStringIsPresentOnPage("chrome://version");
@@ skipping 18 matching lines @@
         finished = true;
       }));
 
   GREYAssert(testing::WaitUntilConditionOrTimeout(1.0,
                                                   ^{
                                                     return finished;
                                                   }),
              @"JavaScript to hide the toolbar did not complete");
 
   // Scroll up to be sure the toolbar can be dismissed by scrolling down.
-  [[EarlGrey
-      selectElementWithMatcher:WebViewScrollView(
-                                   chrome_test_util::GetCurrentWebState())]
-      performAction:grey_swipeFastInDirection(kGREYDirectionDown)];
+  [ChromeEarlGreyUI swipeDownOnWebView];
 
   // Scroll to hide the UI.
-  HideToolbarUsingUI();
+  [ChromeEarlGreyUI swipeUpOnWebView];
   chrome_test_util::AssertToolbarNotVisible();
 
   // Test that the toolbar is visible when moving from one chrome:// link to
   // another chrome:// link.
   chrome_test_util::TapWebViewElementWithId("version");
   chrome_test_util::AssertToolbarVisible();
 }
 
 // Tests hiding and showing of the header with a user scroll on a long page.
 - (void)testHideHeaderUserScrollLongPage {
   std::map<GURL, std::string> responses;
   const GURL URL = web::test::HttpServer::MakeUrl("http://tallpage");
 
   // A page long enough to ensure that the toolbar goes away on scrolling.
   responses[URL] = "<p style='height:200em'>a</p><p>b</p>";
   web::test::SetUpSimpleHttpServer(responses);
 
   [ChromeEarlGrey loadURL:URL];
   chrome_test_util::AssertToolbarVisible();
   // Simulate a user scroll down.
-  HideToolbarUsingUI();
+  [ChromeEarlGreyUI swipeUpOnWebView];
   chrome_test_util::AssertToolbarNotVisible();
   // Simulate a user scroll up.
-  [[EarlGrey
-      selectElementWithMatcher:WebViewScrollView(
-                                   chrome_test_util::GetCurrentWebState())]
-      performAction:grey_swipeFastInDirection(kGREYDirectionDown)];
+  [ChromeEarlGreyUI swipeDownOnWebView];
   chrome_test_util::AssertToolbarVisible();
 }
 
 // Tests that reloading of a page shows the header even if it was not shown
 // previously.
 - (void)testShowHeaderOnReload {
   std::map<GURL, std::string> responses;
   const GURL URL = web::test::HttpServer::MakeUrl("http://origin");
   // This is a tall page -- necessary to make sure scrolling can hide away the
   // toolbar safely-- and with a link to reload itself.
   responses[URL] =
       "<p style='height:200em'>Tall page</p>"
       "<a onclick='window.location.reload();' id='link'>link</a>";
   web::test::SetUpSimpleHttpServer(responses);
 
   [ChromeEarlGrey loadURL:URL];
   AssertStringIsPresentOnPage("Tall page");
 
   // Hide the toolbar.
-  HideToolbarUsingUI();
+  [ChromeEarlGreyUI swipeUpOnWebView];
   chrome_test_util::AssertToolbarNotVisible();
 
   chrome_test_util::TapWebViewElementWithId("link");
 
   // Main test is here: Make sure the header is still visible!
   chrome_test_util::AssertToolbarVisible();
 }
 
 // Test to make sure the header is shown when a Tab opened by the current Tab is
 // closed even if the toolbar was not present previously.
@@ skipping 20 matching lines @@
       javaScript.c_str());
 
   web::test::SetUpSimpleHttpServer(responses);
   chrome_test_util::SetContentSettingsBlockPopups(CONTENT_SETTING_ALLOW);
 
   [ChromeEarlGrey loadURL:URL];
   AssertStringIsPresentOnPage("link1");
   chrome_test_util::AssertMainTabCount(1);
 
   // Hide the toolbar.
-  HideToolbarUsingUI();
+  [ChromeEarlGreyUI swipeUpOnWebView];
   chrome_test_util::AssertToolbarNotVisible();
 
   // Open new window.
   chrome_test_util::TapWebViewElementWithId("link1");
 
   // Check that a new Tab was created.
   AssertStringIsPresentOnPage("link2");
   chrome_test_util::AssertMainTabCount(2);
 
   AssertURLIs(destinationURL);
 
   // Hide the toolbar.
-  HideToolbarUsingUI();
+  [ChromeEarlGreyUI swipeUpOnWebView];
   chrome_test_util::AssertToolbarNotVisible();
 
   // Close the tab.
   chrome_test_util::TapWebViewElementWithId("link2");
   AssertStringIsPresentOnPage("link1");
 
   // Make sure the toolbar is on the screen.
   chrome_test_util::AssertMainTabCount(1);
   chrome_test_util::AssertToolbarVisible();
 }
@@ skipping 17 matching lines @@
   responses[destinationURL] = manyLines +
                               "<a href='javascript:void(0)' "
                               "onclick='window.history.back()' "
                               "id='link2'>link2</a>";
   web::test::SetUpSimpleHttpServer(responses);
 
   [ChromeEarlGrey loadURL:originURL];
 
   AssertStringIsPresentOnPage("link1");
   // Dismiss the toolbar.
-  HideToolbarUsingUI();
+  [ChromeEarlGreyUI swipeUpOnWebView];
   chrome_test_util::AssertToolbarNotVisible();
 
   // Navigate to the other page.
   chrome_test_util::TapWebViewElementWithId("link1");
   AssertStringIsPresentOnPage("link2");
 
   // Make sure toolbar is shown since a new load has started.
   chrome_test_util::AssertToolbarVisible();
 
   // Dismiss the toolbar.
-  HideToolbarUsingUI();
+  [ChromeEarlGreyUI swipeUpOnWebView];
   chrome_test_util::AssertToolbarNotVisible();
 
   // Go back.
   chrome_test_util::TapWebViewElementWithId("link2");
 
   // Make sure the toolbar has loaded now that a new page has loaded.
   chrome_test_util::AssertToolbarVisible();
 }
 
 // Tests that the header is shown when a native page is loaded from a page where
 // the header was not seen before.
 - (void)testShowHeaderOnNativePageLoad {
   std::map<GURL, std::string> responses;
   const GURL URL = web::test::HttpServer::MakeUrl("http://origin");
 
   // A long page representing many lines and a link to go back.
   std::string manyLines =
       "<p style='height:100em'>a</p>"
       "<a onclick='window.history.back()' id='link'>link</a>";
   responses[URL] = manyLines;
   web::test::SetUpSimpleHttpServer(responses);
 
   [ChromeEarlGrey loadURL:URL];
   AssertStringIsPresentOnPage("link");
 
   // Dismiss the toolbar.
-  HideToolbarUsingUI();
+  [ChromeEarlGreyUI swipeUpOnWebView];
   chrome_test_util::AssertToolbarNotVisible();
 
   // Go back to NTP, which is a native view.
   chrome_test_util::TapWebViewElementWithId("link");
 
   // Make sure the toolbar is visible now that a new page has loaded.
   chrome_test_util::AssertToolbarVisible();
 }
 
 // Tests that the header is shown when loading an error page in a native view
 // even if fullscreen was enabled previously.
 - (void)testShowHeaderOnErrorPage {
   std::map<GURL, std::string> responses;
   const GURL URL = web::test::HttpServer::MakeUrl("http://origin");
   // A long page with some simple text -- a long page is necessary so that
   // enough content is present to ensure that the toolbar can be hidden safely.
   responses[URL] = base::StringPrintf(
       "<p style='height:100em'>a</p>"
       "<a href=\"%s\" id=\"link\">bad link</a>",
       ErrorPageResponseProvider::GetDnsFailureUrl().spec().c_str());
   std::unique_ptr<web::DataResponseProvider> provider(
       new ErrorPageResponseProvider(responses));
   web::test::SetUpHttpServer(std::move(provider));
 
   [ChromeEarlGrey loadURL:URL];
-  HideToolbarUsingUI();
+  [ChromeEarlGreyUI swipeUpOnWebView];
   chrome_test_util::AssertToolbarNotVisible();
 
   chrome_test_util::TapWebViewElementWithId("link");
   AssertURLIs(ErrorPageResponseProvider::GetDnsFailureUrl());
   chrome_test_util::AssertToolbarVisible();
 }
 
 @end