add test for get column labels of empty label row

Author: d99kris

CMakeLists.txt

@@ -196,6 +196,7 @@ if(RAPIDCSV_BUILD_TESTS)
   add_unit_test(test104)
   add_unit_test(test105)
   add_unit_test(test106)
+  add_unit_test(test107)
 
   # perf tests
   add_perf_test(ptest001)

tests/test107.cpp

@@ -0,0 +1,31 @@
+// test107.cpp - get column labels of empty label row
+
+#include <rapidcsv.h>
+#include "unittest.h"
+
+int main()
+{
+  int rv = 0;
+
+  try
+  {
+    // Empty document, specify column and row labels available
+    std::string csv = "";
+    std::istringstream s(csv);
+    rapidcsv::Document doc(s, rapidcsv::LabelParams(0, 0));
+
+    // InsertRow create a row with 0 columns
+    doc.InsertRow<std::string>(0);
+
+    // Get column names
+    std::vector<std::string> names = doc.GetColumnNames();
+    unittest::ExpectEqual(size_t, names.size(), size_t(0));
+  }
+  catch (const std::exception& ex)
+  {
+    std::cout << "exception: " << ex.what() << std::endl;
+    rv = 1;
+  }
+
+  return rv;
+}