Make test to compare outputs to docs

Compares the online documentation fields to the list generated from the dict in the repo.
Does not actually interact with RTDE, so should be robot-version agnostic.

Author: URJala

tests/test_rtde_client.cpp

@@ -33,6 +33,7 @@
 #include <optional>
 #include <unordered_map>
 #include <utility>
+#include <iostream>
 #include "ur_client_library/exceptions.h"
 
 #include <ur_client_library/rtde/rtde_client.h>
@@ -59,6 +60,7 @@ class RTDEClientTest : public ::testing::Test
 
   std::string output_recipe_file_ = "resources/rtde_output_recipe.txt";
   std::string exhaustive_output_recipe_file_ = "resources/exhaustive_rtde_output_recipe.txt";
+  std::string docs_output_recipe_file_ = "resources/docs_rtde_output_recipe.txt";
   std::string input_recipe_file_ = "resources/rtde_input_recipe.txt";
   comm::INotifier notifier_;
   std::unique_ptr<rtde_interface::RTDEClient> client_;
@@ -410,6 +412,51 @@ TEST_F(RTDEClientTest, check_all_rtde_output_variables_exist)
   client_->pause();
 }
 
+TEST_F(RTDEClientTest, check_rtde_data_fields_match_docs)
+{
+  std::ifstream docs_file(docs_output_recipe_file_);
+  std::ifstream pkg_file(exhaustive_output_recipe_file_);
+  std::vector<std::string> docs_outputs;
+  std::string line;
+  while (std::getline(docs_file, line))
+  {
+    docs_outputs.push_back(line);
+  }
+  std::vector<std::string> pkg_outputs;
+  while (std::getline(pkg_file, line))
+  {
+    pkg_outputs.push_back(line);
+  }
+  std::sort(docs_outputs.begin(), docs_outputs.end());
+  std::sort(pkg_outputs.begin(), pkg_outputs.end());
+  if (!std::is_permutation(docs_outputs.begin(), docs_outputs.end(), pkg_outputs.begin(), pkg_outputs.end()))
+  {
+    std::cout << "Data package output fields do not match output fields in documentation" << std::endl;
+    std::unordered_map<std::string, int> diff;
+    std::cout << "Differences: " << std::endl;
+    for (auto name : docs_outputs)
+    {
+      diff[name] += 1;
+    }
+    for (auto name : pkg_outputs)
+    {
+      diff[name] -= 1;
+    }
+    for (auto elem : diff)
+    {
+      if (elem.second > 0)
+      {
+        std::cout << elem.first << " exists in documentation, but not in data package dict." << std::endl;
+      }
+      if (elem.second < 0)
+      {
+        std::cout << elem.first << " exists in data package dict, but not in documentation." << std::endl;
+      }
+    }
+    GTEST_FAIL();
+  }
+}
+
 TEST_F(RTDEClientTest, check_unknown_rtde_output_variable)
 {
   client_->init();