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/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browsing_data/autofill_counter.h"
 #include "chrome/test/base/testing_browser_process.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+#if defined(ENABLE_EXTENSIONS)
+#include "base/strings/string_split.h"
+#include "chrome/browser/browsing_data/hosted_apps_counter.h"
+#endif
+
 // 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());
 
   // Test all configurations of zero and nonzero partial results for datatypes.
   // Test singular and plural for each datatype.
-  struct TestCase {
+  const struct TestCase {
     int num_credit_cards;
     int num_addresses;
     int num_suggestions;
     std::string expected_output;
-  } test_cases[] = {
+  } kTestCases[] = {
       {0, 0, 0, "none"},
       {1, 0, 0, "1 credit card"},
       {0, 5, 0, "5 addresses"},
       {0, 0, 1, "1 suggestion"},
       {0, 0, 2, "2 suggestions"},
       {4, 7, 0, "4 credit cards, 7 addresses"},
       {3, 0, 9, "3 credit cards, 9 other suggestions"},
       {0, 1, 1, "1 address, 1 other suggestion"},
       {9, 6, 3, "9 credit cards, 6 addresses, 3 others"},
       {4, 2, 1, "4 credit cards, 2 addresses, 1 other"},
   };
 
-  for (const TestCase& test_case : test_cases) {
+  for (const TestCase& test_case : kTestCases) {
     AutofillCounter::AutofillResult result(
         &counter,
         test_case.num_suggestions,
         test_case.num_credit_cards,
         test_case.num_addresses);
 
     SCOPED_TRACE(base::StringPrintf(
         "Test params: %d credit card(s), "
             "%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));
   }
 }
+
+#if defined(ENABLE_EXTENSIONS)
+// 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.
+  const struct TestCase {
+    std::string apps_list;
+    std::string expected_output;
+  } kTestCases[] = {
+      { "", "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 : kTestCases) {
+    // 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));
+  }
+}
+#endif