base: Move StringSplitAlongWhitespace to string_split.h

base/string_split_unittest.cc

 // Copyright (c) 2010 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 "base/string_split.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using ::testing::ElementsAre;
 
@@ skipping 244 matching lines @@
   EXPECT_EQ(r[3], "");
   r.clear();
 
   SplitStringDontTrim("\ta\t\nb\tcc", '\n', &r);
   ASSERT_EQ(2U, r.size());
   EXPECT_EQ(r[0], "\ta\t");
   EXPECT_EQ(r[1], "b\tcc");
   r.clear();
 }
 
+TEST(StringSplitTest, SplitStringAlongWhitespace) {
+  struct TestData {
+    const std::wstring input;
+    const size_t expected_result_count;
+    const std::wstring output1;
+    const std::wstring output2;
+  } data[] = {
+    { L"a",       1, L"a",  L""   },
+    { L" ",       0, L"",   L""   },
+    { L" a",      1, L"a",  L""   },
+    { L" ab ",    1, L"ab", L""   },
+    { L" ab c",   2, L"ab", L"c"  },
+    { L" ab c ",  2, L"ab", L"c"  },
+    { L" ab cd",  2, L"ab", L"cd" },
+    { L" ab cd ", 2, L"ab", L"cd" },
+    { L" \ta\t",  1, L"a",  L""   },
+    { L" b\ta\t", 2, L"b",  L"a"  },
+    { L" b\tat",  2, L"b",  L"at" },
+    { L"b\tat",   2, L"b",  L"at" },
+    { L"b\t at",  2, L"b",  L"at" },
+  };
+  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(data); ++i) {
+    std::vector<std::wstring> results;
+    SplitStringAlongWhitespace(data[i].input, &results);
+    ASSERT_EQ(data[i].expected_result_count, results.size());
+    if (data[i].expected_result_count > 0)
+      ASSERT_EQ(data[i].output1, results[0]);
+    if (data[i].expected_result_count > 1)
+      ASSERT_EQ(data[i].output2, results[1]);
+  }
+}
+
 }  // namespace base