base: Move StringSplitAlongWhitespace to string_split.h

base/string_split_unittest.cc

Index: base/string_split_unittest.cc
diff --git a/base/string_split_unittest.cc b/base/string_split_unittest.cc
index afdc52624b01c2a8ea6a3d39865e1f86f367cc97..749d56662b7e25ee4c0f1dddbc1f31e424d0b5d4 100644
--- a/base/string_split_unittest.cc
+++ b/base/string_split_unittest.cc
@@ -262,4 +262,36 @@ TEST(StringSplitTest, StringSplitDontTrim) {
   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