Web shell test to go back and forward.

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 38936aecbe8e41e3afd7e501e2542f321e2b89c4..24d10258a224f816a82b3008c70a899a5a686506 100644
--- a/ios/web/shell/test/web_shell_navigation_egtest.mm
+++ b/ios/web/shell/test/web_shell_navigation_egtest.mm
@@ -3,63 +3,86 @@
 // found in the LICENSE file.
 
 #import <UIKit/UIKit.h>
+#import <WebKit/WebKit.h>
 #import <XCTest/XCTest.h>
 
 #import <EarlGrey/EarlGrey.h>
 
-#import "ios/web/shell/view_controller.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"
+#include "ios/web/shell/test/navigation_test_util.h"
+#import "ios/web/shell/test/shell_matchers.h"
+#import "ios/web/shell/test/web_view_matchers.h"
 
+// Navigation test cases for the web shell. These are Earl Grey integration
+// tests, which are based on XCTest.
 @interface CRWWebShellNavigationTest : XCTestCase
 
 @end
 
 @implementation CRWWebShellNavigationTest
 
-// Sample test to load a live URL, go back and then forward.
-- (void)testExternalURLBackAndForward {
-  [[EarlGrey
-      selectElementWithMatcher:grey_accessibilityLabel(
-                                   kWebShellAddressFieldAccessibilityLabel)]
-      performAction:grey_tap()];
-  [[EarlGrey selectElementWithMatcher:grey_accessibilityLabel(@"Clear text")]
-      performAction:grey_tap()];
-  [[EarlGrey
-      selectElementWithMatcher:grey_accessibilityLabel(
-                                   kWebShellAddressFieldAccessibilityLabel)]
-      performAction:grey_typeText(@"http://browsingtest.appspot.com\n")];
-  [[EarlGrey
-      selectElementWithMatcher:grey_accessibilityLabel(
-                                   kWebShellBackButtonAccessibilityLabel)]
-      performAction:grey_tap()];
-  [[EarlGrey
-      selectElementWithMatcher:grey_accessibilityLabel(
-                                   kWebShellForwardButtonAccessibilityLabel)]
-      performAction:grey_tap()];
+// Set up called once for the class.
++ (void)setUp {
+  [super setUp];
+  [[EarlGrey selectElementWithMatcher:shell_webViewContainingText(@"Chromium")]
+      assertWithMatcher:grey_notNil()];
+  web::test::HttpServer& server = web::test::HttpServer::GetSharedInstance();
+  server.StartOrDie();
+  DCHECK(server.IsRunning());
 }
 
-// Sample test to load a live URL, go back, forward, and then back again.
-- (void)testExternalURLBackAndForwardAndBack {
-  [[EarlGrey
-      selectElementWithMatcher:grey_accessibilityLabel(
-                                   kWebShellAddressFieldAccessibilityLabel)]
-      performAction:grey_tap()];
-  [[EarlGrey selectElementWithMatcher:grey_accessibilityLabel(@"Clear text")]
-      performAction:grey_tap()];
-  [[EarlGrey
-      selectElementWithMatcher:grey_accessibilityLabel(
-                                   kWebShellAddressFieldAccessibilityLabel)]
-      performAction:grey_typeText(@"http://browsingtest.appspot.com\n")];
-  [[EarlGrey
-      selectElementWithMatcher:grey_accessibilityLabel(
-                                   kWebShellBackButtonAccessibilityLabel)]
-      performAction:grey_tap()];
-  [[EarlGrey
-      selectElementWithMatcher:grey_accessibilityLabel(
-                                   kWebShellForwardButtonAccessibilityLabel)]
+// Tear down called once for the class.
++ (void)tearDown {
+  [super tearDown];
+  web::test::HttpServer& server = web::test::HttpServer::GetSharedInstance();
+  server.Stop();
+  DCHECK(!server.IsRunning());
+}
+
+// Tear down called after each test.
+- (void)tearDown {
+  [super tearDown];
+  web::test::HttpServer& server = web::test::HttpServer::GetSharedInstance();
+  server.RemoveAllResponseProviders();
+}
+
+// Tests the back and forward button after entering two URLs.
+- (void)testWebScenarioBrowsingBackAndForward {
+  // Create map of canned responses and set up the test HTML server.
+  std::map<GURL, std::string> responses;
+  const GURL URL1 = web::test::HttpServer::MakeUrl("http://firstURL");
+  NSString* response1 = @"Test Page 1";
+  responses[URL1] = base::SysNSStringToUTF8(response1);
+
+  const GURL URL2 = web::test::HttpServer::MakeUrl("http://secondURL");
+  NSString* response2 = @"Test Page 2";
+  responses[URL2] = base::SysNSStringToUTF8(response2);
+
+  web::test::SetUpSimpleHttpServer(responses);
+
+  web::navigation_test_util::LoadUrl(URL1);
+
+  [[EarlGrey selectElementWithMatcher:shell_webViewContainingText(response1)]
+      assertWithMatcher:grey_notNil()];
+
+  web::navigation_test_util::LoadUrl(URL2);
+
+  [[EarlGrey selectElementWithMatcher:shell_webViewContainingText(response2)]
+      assertWithMatcher:grey_notNil()];
+
+  [[EarlGrey selectElementWithMatcher:shell_backButton()]
       performAction:grey_tap()];
-  [[EarlGrey
-      selectElementWithMatcher:grey_accessibilityLabel(
-                                   kWebShellBackButtonAccessibilityLabel)]
+
+  [[EarlGrey selectElementWithMatcher:shell_webViewContainingText(response1)]
+      assertWithMatcher:grey_notNil()];
+
+  [[EarlGrey selectElementWithMatcher:shell_forwardButton()]
       performAction:grey_tap()];
+
+  [[EarlGrey selectElementWithMatcher:shell_webViewContainingText(response2)]
+      assertWithMatcher:grey_notNil()];
 }
+
 @end