Remove vector from testcase struct

Author: psx95

api/test/trace/propagation/detail/string_test.cc

@@ -8,84 +8,57 @@
 #include "opentelemetry/nostd/string_view.h"
 
 using namespace opentelemetry;
-//
-// struct SplitStringTestData
-//{
-//   opentelemetry::nostd::string_view input;
-//   char separator;
-//   size_t max_count;
-//   std::vector<opentelemetry::nostd::string_view> splits;
-//   size_t expected_number_strings;
-// };
-//
-// const SplitStringTestData split_string_test_cases[] = {
-//     {"foo,bar,baz", ',', 4, std::vector<opentelemetry::nostd::string_view>{"foo", "bar", "baz"},
-//     3},
-//     {"foo,bar,baz,foobar", ',', 4,
-//      std::vector<opentelemetry::nostd::string_view>{"foo", "bar", "baz", "foobar"}, 4},
-//     {"foo,bar,baz,foobar", '.', 4,
-//      std::vector<opentelemetry::nostd::string_view>{"foo,bar,baz,foobar"}, 1},
-//     {"foo,bar,baz,", ',', 4,
-//      std::vector<opentelemetry::nostd::string_view>{"foo", "bar", "baz", ""}, 4},
-//     {"foo,bar,baz,", ',', 2, std::vector<opentelemetry::nostd::string_view>{"foo", "bar"}, 2},
-//     {"foo ,bar, baz ", ',', 4,
-//      std::vector<opentelemetry::nostd::string_view>{"foo ", "bar", " baz "}, 3},
-//     {"foo ,bar, baz ", ',', 4,
-//      std::vector<opentelemetry::nostd::string_view>{"foo ", "bar", " baz "}, 3},
-//     {"00-0af7651916cd43dd8448eb211c80319c-00f067aa0ba902b7-01", '-', 4,
-//      std::vector<opentelemetry::nostd::string_view>{"00", "0af7651916cd43dd8448eb211c80319c",
-//                                                     "00f067aa0ba902b7", "01"},
-//      4},
-// };
 
-TEST(StringTest, SplitStringTest)
+namespace
 {
-  struct
-  {
-    opentelemetry::nostd::string_view input;
-    char separator;
-    size_t max_count;
-    std::vector<opentelemetry::nostd::string_view> splits;
-    size_t expected_number_strings;
-  } test_cases[] = {
-      {"foo,bar,baz", ',', 4, std::vector<opentelemetry::nostd::string_view>{"foo", "bar", "baz"},
-       3},
-//      {"foo,bar,baz,foobar", ',', 4,
-//       std::vector<opentelemetry::nostd::string_view>{"foo", "bar", "baz", "foobar"}, 4},
-//      {"foo,bar,baz,foobar", '.', 4,
-//       std::vector<opentelemetry::nostd::string_view>{"foo,bar,baz,foobar"}, 1},
-//      {"foo,bar,baz,", ',', 4,
-//       std::vector<opentelemetry::nostd::string_view>{"foo", "bar", "baz", ""}, 4},
-//      {"foo,bar,baz,", ',', 2, std::vector<opentelemetry::nostd::string_view>{"foo", "bar"}, 2},
-//      {"foo ,bar, baz ", ',', 4,
-//       std::vector<opentelemetry::nostd::string_view>{"foo ", "bar", " baz "}, 3},
-//      {"foo ,bar, baz ", ',', 4,
-//       std::vector<opentelemetry::nostd::string_view>{"foo ", "bar", " baz "}, 3},
-//      {"00-0af7651916cd43dd8448eb211c80319c-00f067aa0ba902b7-01", '-', 4,
-//       std::vector<opentelemetry::nostd::string_view>{"00", "0af7651916cd43dd8448eb211c80319c",
-//                                                      "00f067aa0ba902b7", "01"},4}
-  };
-  for (auto &test_param : test_cases)
-  {
-    std::vector<opentelemetry::nostd::string_view> fields{};
-    fields.reserve(test_param.expected_number_strings);
-    size_t got_splits_num = opentelemetry::trace::propagation::detail::SplitString(
-        test_param.input, test_param.separator, fields.data(), test_param.max_count);
 
-    // Assert on the output
-    EXPECT_EQ(got_splits_num, test_param.expected_number_strings);
-    for (size_t i = 0; i < got_splits_num; i++)
-    {
-      // Checks for resulting strings in-order
-      EXPECT_EQ(fields[i], test_param.splits[i]);
-    }
+struct SplitStringTestData
+{
+  opentelemetry::nostd::string_view input;
+  char separator;
+  size_t max_count;
+  size_t expected_number_strings;
+
+  // When googletest registers parameterized tests, it uses this method to format the parameters.
+  // The default implementation prints hex dump of all bytes in the object. If there is any padding
+  // in these bytes, valgrind reports this as a warning - "Use of uninitialized bytes".
+  // See https://github.com/google/googletest/issues/3805.
+  friend void PrintTo(const SplitStringTestData &data, std::ostream *os)
+  {
+    std::stringstream ss;
+    *os << "(" << data.input << "," << data.separator << "," << data.max_count << ","
+        << data.expected_number_strings << ")";
   }
-}
+};
+
+const SplitStringTestData split_string_test_cases[] = {
+    {"foo,bar,baz", ',', 4, 3},
+    {"foo,bar,baz,foobar", ',', 4, 4},
+    {"foo,bar,baz,foobar", '.', 4, 1},
+    {"foo,bar,baz,", ',', 4, 4},
+    {"foo,bar,baz,", ',', 2, 2},
+    {"foo ,bar, baz ", ',', 4, 3},
+    {"foo ,bar, baz ", ',', 4, 3},
+    {"00-0af7651916cd43dd8448eb211c80319c-00f067aa0ba902b7-01", '-', 4, 4},
+};
+}  // namespace
+
+// Test fixture
+class SplitStringTestFixture : public ::testing::TestWithParam<SplitStringTestData>
+{};
 
-TEST(StringTest, SimpleTest)
+TEST_P(SplitStringTestFixture, SplitsAsExpected)
 {
-  nostd::string_view input = "foo,bar,baz";
-  std::array<nostd::string_view, 4> fields{};
-  size_t got_splits = ::trace::propagation::detail::SplitString(input, ',', fields.data(), 4);
-  EXPECT_EQ(3, got_splits);
+  const SplitStringTestData test_param = GetParam();
+  std::vector<opentelemetry::nostd::string_view> fields{};
+  fields.reserve(test_param.expected_number_strings);
+  size_t got_splits_num = opentelemetry::trace::propagation::detail::SplitString(
+      test_param.input, test_param.separator, fields.data(), test_param.max_count);
+
+  // Assert on the output
+  EXPECT_EQ(got_splits_num, test_param.expected_number_strings);
 }
+
+INSTANTIATE_TEST_SUITE_P(SplitStringTestCases,
+                         SplitStringTestFixture,
+                         ::testing::ValuesIn(split_string_test_cases));