Implement GetCounterTextFromResult() for the hosted apps counter.

chrome/browser/browsing_data/browsing_data_counter_utils_unittest.cc

 // Copyright 2015 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 "chrome/browser/browsing_data/browsing_data_counter_utils.h"
 
+#include <string>
+#include <vector>
+
+#include "base/strings/string_split.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browsing_data/autofill_counter.h"
+#include "chrome/browser/browsing_data/hosted_apps_counter.h"
 #include "chrome/test/base/testing_browser_process.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 // Tests the complex output of the Autofill counter.
 TEST(BrowsingDataCounterUtilsTest, AutofillCounterResult) {
   AutofillCounter counter;
 
   // This test assumes that the strings are served exactly as defined,
   // i.e. that the locale is set to the default "en".
   ASSERT_EQ("en", TestingBrowserProcess::GetGlobal()->GetApplicationLocale());
@@ skipping 30 matching lines @@
             "%d address(es), %d suggestion(s).",
         test_case.num_credit_cards,
         test_case.num_addresses,
         test_case.num_suggestions
     ));
 
     base::string16 output = GetCounterTextFromResult(&result);
     EXPECT_EQ(output, base::ASCIIToUTF16(test_case.expected_output));
   }
 }
+
+// Tests the complex output of the hosted apps counter.
+TEST(BrowsingDataCounterUtilsTest, HostedAppsCounterResult) {
+  HostedAppsCounter counter;
+
+  // This test assumes that the strings are served exactly as defined,
+  // i.e. that the locale is set to the default "en".
+  ASSERT_EQ("en", TestingBrowserProcess::GetGlobal()->GetApplicationLocale());
+
+  // Test the output for various numbers of hosted apps.
+  struct TestCase {

[vabr (Chromium), 2016/06/20 13:51:43]

nit: This could be const.
(If you make it const, change the name to kTestCases.

[msramek, 2016/06/20 14:06:18]

Done. Here and above.

+    std::string apps_list;
+    std::string expected_output;
+  } test_cases[] = {
+      { "", "none" },
+      { "App1", "1 app (App1)" },
+      { "App1, App2", "2 apps (App1, App2)" },
+      { "App1, App2, App3", "3 apps (App1, App2, and 1 more)" },
+      { "App1, App2, App3, App4", "4 apps (App1, App2, and 2 more)" },
+      { "App1, App2, App3, App4, App5", "5 apps (App1, App2, and 3 more)" },
+  };
+
+  for (const TestCase& test_case : test_cases) {
+    // Split the list of installed apps by commas.
+    std::vector<std::string> apps = base::SplitString(
+        test_case.apps_list, ",",
+        base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
+
+    // The first two apps in the list are used as examples.
+    std::vector<std::string> examples;
+    examples.assign(
+        apps.begin(), apps.begin() + (apps.size() > 2 ? 2 : apps.size()));
+
+    HostedAppsCounter::HostedAppsResult result(
+        &counter,
+        apps.size(),
+        examples);
+
+    base::string16 output = GetCounterTextFromResult(&result);
+    EXPECT_EQ(output, base::ASCIIToUTF16(test_case.expected_output));
+  }
+}