Experiment to add bank name in autofill ui.

components/autofill/core/browser/credit_card_unittest.cc

 // Copyright 2013 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.
 
 #include <stddef.h>
 
 #include "base/guid.h"
 #include "base/macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/test/scoped_feature_list.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "components/autofill/core/browser/autofill_experiments.h"
 #include "components/autofill/core/browser/autofill_test_utils.h"
 #include "components/autofill/core/browser/autofill_type.h"
 #include "components/autofill/core/browser/credit_card.h"
 #include "components/autofill/core/browser/validation.h"
 #include "components/autofill/core/common/autofill_constants.h"
 #include "components/autofill/core/common/form_field_data.h"
 #include "components/grit/components_scaled_resources.h"
@@ skipping 127 matching lines @@
       "1");
   base::string16 summary5 = credit_card5.Label();
   EXPECT_EQ(
       UTF8ToUTF16(std::string("Card") + kUTF8MidlineEllipsis + "5100, 01/2010"),
       summary5);
   base::string16 obfuscated5 = credit_card5.NetworkAndLastFourDigits();
   EXPECT_EQ(UTF8ToUTF16(std::string("Card") + kUTF8MidlineEllipsis + "5100"),
             obfuscated5);
 }
 
+// Tests credit card bank name and last four digits string generation.
+TEST(CreditCardTest, BankNameAndLastFourDigitsStrings) {
+  // Case 1: Have everything and show bank name
+  CreditCard credit_card1(base::GenerateGUID(), "https://www.example.com/");
+  test::SetCreditCardInfo(&credit_card1, "John Dillinger",
+                          "5105 1051 0510 5100", "01", "2010", "1");
+  credit_card1.SetBankName("Chase");
+  base::string16 obfuscated1 = credit_card1.BankNameAndLastFourDigits();
+  EXPECT_FALSE(credit_card1.bank_name().empty());
+  EXPECT_EQ(UTF8ToUTF16(std::string("Chase") + kUTF8MidlineEllipsis + "5100"),
+            obfuscated1);
+
+  // Case 2: Have no bank name and not show bank name
+  CreditCard credit_card2(base::GenerateGUID(), "https://www.example.com/");
+  test::SetCreditCardInfo(&credit_card2, "John Dillinger",
+                          "5105 1051 0510 5100", "01", "2010", "1");
+  base::string16 obfuscated2 = credit_card2.BankNameAndLastFourDigits();
+  EXPECT_TRUE(credit_card2.bank_name().empty());
+  EXPECT_EQ(UTF8ToUTF16(std::string(kUTF8MidlineEllipsis) + "5100"), obfuscated2);

[Jared Saul, 2017/06/07 01:22:59]

+ test for bank name but not digits?  Since your code accounts for that

[Shanfeng, 2017/06/07 17:20:16]

Done.

[jiahuiguo, 2017/06/14 05:51:28]

Exceed 80 column limit?

[Shanfeng, 2017/06/14 17:48:25]

Not valid.

+}
+
 TEST(CreditCardTest, AssignmentOperator) {
   CreditCard a(base::GenerateGUID(), "some origin");
   test::SetCreditCardInfo(&a, "John Dillinger", "123456789012", "01", "2010",
                           "1");
 
   // Result of assignment should be logically equal to the original profile.
   CreditCard b(base::GenerateGUID(), "some other origin");
   b = a;
   EXPECT_TRUE(a == b);
 
@@ skipping 922 matching lines @@
               credit_card0.GetLastUsedDateForDisplay(test_case.app_locale));
     EXPECT_EQ(test_case.last_used_date,
               credit_card1.GetLastUsedDateForDisplay(test_case.app_locale));
     EXPECT_EQ(test_case.last_used_year_ago,
               credit_card2.GetLastUsedDateForDisplay(test_case.app_locale));
     variation_params_.ClearAllVariationParams();
   }
 }
 
 }  // namespace autofill