[ios] EarlGrey tests for HTTP Authentication.

ios/chrome/browser/web/http_auth_egtest.mm

Index: ios/chrome/browser/web/http_auth_egtest.mm
diff --git a/ios/chrome/browser/web/http_auth_egtest.mm b/ios/chrome/browser/web/http_auth_egtest.mm
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+// 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>
+
+#include "base/base64.h"
+#include "base/memory/ptr_util.h"
+#include "base/strings/stringprintf.h"
+#include "base/strings/sys_string_conversions.h"
+#include "components/strings/grit/components_strings.h"
+#include "ios/chrome/browser/ui/ui_util.h"
+#include "ios/chrome/grit/ios_strings.h"
+#include "ios/chrome/test/app/navigation_test_util.h"
+#import "ios/chrome/test/earl_grey/chrome_matchers.h"
+#import "ios/chrome/test/earl_grey/chrome_test_case.h"
+#import "ios/testing/wait_util.h"
+#import "ios/web/public/test/http_server.h"
+#include "ios/web/public/test/http_server_util.h"
+#include "ios/web/public/test/response_providers/html_response_provider.h"
+#import "ios/testing/earl_grey/disabled_test_macros.h"
+#include "ui/base/l10n/l10n_util_mac.h"
+#include "url/gurl.h"
+
+using testing::WaitUntilConditionOrTimeout;
+using testing::kWaitForPageLoadTimeout;
+using chrome_test_util::webViewContainingText;
+
+namespace {
+
+// Serves a page which requires Basic HTTP Authentication.
+class HttpAuthResponseProvider : public HtmlResponseProvider {
+ public:
+  // Constructs provider which will respond to the given |url| and will use the
+  // given authenticaion |realm|. |username| and |password| are credentials
+  // required for sucessfull authentication. Use different realms and
+  // username/password combination for different tests to prevent credentials
+  // caching.
+  HttpAuthResponseProvider(const GURL& url,
+                           const std::string& realm,
+                           const std::string& username,
+                           const std::string& password)
+      : url_(url), realm_(realm), username_(username), password_(password) {}
+  ~HttpAuthResponseProvider() override {}
+
+  // HtmlResponseProvider overrides:
+  bool CanHandleRequest(const Request& request) override {
+    return request.url == url_;
+  }
+  void GetResponseHeadersAndBody(
+      const Request& request,
+      scoped_refptr<net::HttpResponseHeaders>* headers,
+      std::string* response_body) override {
+    if (HeadersHaveValidCredentials(request.headers)) {
+      *response_body = page_text();
+      *headers = GetDefaultResponseHeaders();
+    } else {
+      *headers = GetResponseHeaders("", net::HTTP_UNAUTHORIZED);
+      (*headers)->AddHeader(base::StringPrintf(
+          "WWW-Authenticate: Basic realm=\"%s\"", realm_.c_str()));
+    }
+  }
+
+  // Text returned in response if authentication was successfull.
+  static std::string page_text() { return "authenticated"; }
+
+ private:
+  // Check if authorization header has valid credintials:
+  // https://tools.ietf.org/html/rfc1945#section-10.2
+  bool HeadersHaveValidCredentials(const net::HttpRequestHeaders& headers) {
+    std::string header;
+    if (headers.GetHeader(net::HttpRequestHeaders::kAuthorization, &header)) {
+      std::string auth =
+          base::StringPrintf("%s:%s", username_.c_str(), password_.c_str());
+      std::string encoded_auth;
+      base::Base64Encode(auth, &encoded_auth);
+      return header == base::StringPrintf("Basic %s", encoded_auth.c_str());
+    }
+    return false;
+  }
+
+  // URL this provider responds to.
+  GURL url_;
+  // HTTP Authentication realm.
+  std::string realm_;
+  // Correct username to pass authentication
+  std::string username_;
+  // Correct password to pass authentication
+  std::string password_;
+};
+
+// Returns matcher for HTTP Authentication dialog.
+id<GREYMatcher> httpAuthDialog() {
+  NSString* title = l10n_util::GetNSStringWithFixup(IDS_LOGIN_DIALOG_TITLE);
+  return chrome_test_util::staticTextWithAccessibilityLabel(title);
+}
+
+// Returns matcher for Username text field.
+id<GREYMatcher> usernameField() {
+  return chrome_test_util::staticTextWithAccessibilityLabelId(
+      IDS_IOS_HTTP_LOGIN_DIALOG_USERNAME_PLACEHOLDER);
+}
+
+// Returns matcher for Password text field.
+id<GREYMatcher> passwordField() {
+  return chrome_test_util::staticTextWithAccessibilityLabelId(
+      IDS_IOS_HTTP_LOGIN_DIALOG_PASSWORD_PLACEHOLDER);
+}
+
+// Returns matcher for Login button.
+id<GREYMatcher> loginButton() {
+  return chrome_test_util::buttonWithAccessibilityLabelId(
+      IDS_LOGIN_DIALOG_OK_BUTTON_LABEL);
+}
+
+// Waits until static text with IDS_LOGIN_DIALOG_TITLE label is displayed.
+void WaitForHttpAuthDialog() {
+  BOOL dialog_shown = WaitUntilConditionOrTimeout(kWaitForPageLoadTimeout, ^{
+    NSError* error = nil;
+    [[EarlGrey selectElementWithMatcher:httpAuthDialog()]
+        assertWithMatcher:grey_notNil()
+                    error:&error];
+    return !error;
+  });
+  GREYAssert(dialog_shown, @"HTTP Authentication dialog was not shown");
+}
+
+}  // namespace
+
+// Test case for HTTP Authentication flow.
+@interface HTTPAuthTestCase : ChromeTestCase
+@end
+
+@implementation HTTPAuthTestCase
+
+// Tests Basic HTTP Authentication with correct username and password.
+- (void)testSuccessfullBasicAuth {
+  if (IsIPadIdiom()) {
+    // EG does not allow interactions with HTTP Dialog when loading spinner is
+    // animated. TODO(crbug.com/680290): Enable this test on iPad when EarlGrey
+    // allows tapping dialog buttons with active page load spinner.

[baxley, 2017/01/12 23:57:18]

Sorry if I forgot from our conversation... Disabling synchronization doesn't
help here?

[Eugene But (OOO till 7-30), 2017/01/13 00:05:49]

No. EG can not Tap and complains about ongoing animation :(

+    EARL_GREY_TEST_DISABLED(@"Tab Title not displayed on handset.");
+  }
+
+  GURL URL = web::test::HttpServer::MakeUrl("http://good-auth");
+  web::test::SetUpHttpServer(base::MakeUnique<HttpAuthResponseProvider>(
+      URL, "GoodRealm", "gooduser", "goodpass"));
+  chrome_test_util::LoadUrl(URL);
+  WaitForHttpAuthDialog();
+
+  // Enter valid username and password.
+  [[EarlGrey selectElementWithMatcher:usernameField()]
+      performAction:grey_typeText(@"gooduser")];
+  [[EarlGrey selectElementWithMatcher:passwordField()]
+      performAction:grey_typeText(@"goodpass")];
+  [[EarlGrey selectElementWithMatcher:loginButton()] performAction:grey_tap()];
+
+  const std::string pageText = HttpAuthResponseProvider::page_text();
+  [[EarlGrey selectElementWithMatcher:webViewContainingText(pageText)]
+      assertWithMatcher:grey_notNil()];
+}
+
+// Tests Basic HTTP Authentication with incorrect username and password.
+- (void)testUnsuccessfullBasicAuth {
+  if (IsIPadIdiom()) {
+    // EG does not allow interactions with HTTP Dialog when loading spinner is
+    // animated. TODO(crbug.com/680290): Enable this test on iPad when EarlGrey
+    // allows tapping dialog buttons with active page load spinner.
+    EARL_GREY_TEST_DISABLED(@"Tab Title not displayed on handset.");
+  }
+
+  GURL URL = web::test::HttpServer::MakeUrl("http://bad-auth");
+  web::test::SetUpHttpServer(base::MakeUnique<HttpAuthResponseProvider>(
+      URL, "BadRealm", "baduser", "badpass"));

[baxley, 2017/01/12 23:57:18]

optional nit: should this these arguments start with "good", and then have the
user pass in "bad*" ?

[Eugene But (OOO till 7-30), 2017/01/13 00:05:50]

No. After successful authorization (which happens in testSuccessfullBasicAuth)
WKWebView may send old cached credentials which are gooduser/goodpass so using
good prefix will make this test flaky, because authorization will sometimes
suceed.

Requirement to change the password is described in HttpAuthResponseProvider
constructor comments.

+  chrome_test_util::LoadUrl(URL);
+  WaitForHttpAuthDialog();
+
+  // Enter invalid username and password.
+  [[EarlGrey selectElementWithMatcher:usernameField()]
+      performAction:grey_typeText(@"gooduser")];
+  [[EarlGrey selectElementWithMatcher:passwordField()]
+      performAction:grey_typeText(@"goodpass")];
+  [[EarlGrey selectElementWithMatcher:loginButton()] performAction:grey_tap()];
+
+  // Verifies that authentication was requested again.
+  WaitForHttpAuthDialog();
+}
+
+// Tests Cancelling Basic HTTP Authentication.
+- (void)testCancellingBasicAuth {
+  if (IsIPadIdiom()) {
+    // EG does not allow interactions with HTTP Dialog when loading spinner is
+    // animated. TODO(crbug.com/680290): Enable this test on iPad when EarlGrey
+    // allows tapping dialog buttons with active page load spinner.
+    EARL_GREY_TEST_DISABLED(@"Tab Title not displayed on handset.");
+  }
+
+  GURL URL = web::test::HttpServer::MakeUrl("http://cancel-auth");
+  web::test::SetUpHttpServer(base::MakeUnique<HttpAuthResponseProvider>(
+      URL, "CancellingRealm", "", ""));
+  chrome_test_util::LoadUrl(URL);
+  WaitForHttpAuthDialog();
+
+  [[EarlGrey selectElementWithMatcher:chrome_test_util::cancelButton()]
+      performAction:grey_tap()];
+  [[EarlGrey selectElementWithMatcher:httpAuthDialog()]
+      assertWithMatcher:grey_nil()];
+}
+
+@end