object-introspection/test/type_graph_utils.cpp

#include "test/type_graph_utils.h"

#include <gtest/gtest.h>

#include "oi/ContainerInfo.h"
#include "oi/type_graph/PassManager.h"
#include "oi/type_graph/Printer.h"
#include "oi/type_graph/TypeGraph.h"
#include "test/TypeGraphParser.h"

using type_graph::Container;
using type_graph::NodeId;
using type_graph::Pass;
using type_graph::Type;
using type_graph::TypeGraph;

template <typename T>
using ref = std::reference_wrapper<T>;

void check(const std::vector<ref<Type>>& types,
           std::string_view expected,
           std::string_view comment) {
  std::stringstream out;
  type_graph::Printer printer(out, types.size());

  for (const auto& type : types) {
    printer.print(type);
  }

  if (expected[0] == '\n')
    expected.remove_prefix(1);  // Remove initial '\n'
  ASSERT_EQ(expected, out.str()) << "Test failure " << comment;
}

void test(type_graph::Pass pass,
          std::string_view input,
          std::string_view expectedAfter) {
  input.remove_prefix(1);  // Remove initial '\n'
  TypeGraph typeGraph;
  TypeGraphParser parser{typeGraph};
  try {
    parser.parse(input);
  } catch (const TypeGraphParserError& err) {
    FAIL() << "Error parsing input graph: " << err.what();
  }

  // Validate input formatting
  check(typeGraph.rootTypes(), input, "parsing input graph");

  // Run pass and check results
  test(pass, typeGraph.rootTypes(), expectedAfter);
}

void testNoChange(type_graph::Pass pass, std::string_view input) {
  input.remove_prefix(1);  // Remove initial '\n'
  TypeGraph typeGraph;
  TypeGraphParser parser{typeGraph};
  try {
    parser.parse(input);
  } catch (const TypeGraphParserError& err) {
    FAIL() << "Error parsing input graph: " << err.what();
  }

  // Validate input formatting
  check(typeGraph.rootTypes(), input, "parsing input graph");

  // Run pass and check results
  test(pass, typeGraph.rootTypes(), input);
}

void test(type_graph::Pass pass,
          std::vector<ref<Type>> rootTypes,
          std::string_view expectedBefore,
          std::string_view expectedAfter) {
  if (expectedBefore.data()) {
    check(rootTypes, expectedBefore, "before running pass");
  }

  TypeGraph typeGraph;
  for (const auto& type : rootTypes) {
    typeGraph.addRoot(type);
  }

  pass.run(typeGraph);

  // Must use typeGraph's root types here, as the pass may have modified them
  check(typeGraph.rootTypes(), expectedAfter, "after running pass");
}

void test(type_graph::Pass pass,
          std::vector<ref<Type>> rootTypes,
          std::string_view expectedAfter) {
  test(pass, rootTypes, {}, expectedAfter);
}

Container getVector(NodeId id) {
  static ContainerInfo info{"std::vector", SEQ_TYPE, "vector"};
  info.stubTemplateParams = {1};
  return Container{id, info, 24};
}

Container getMap(NodeId id) {
  static ContainerInfo info{"std::map", STD_MAP_TYPE, "map"};
  info.stubTemplateParams = {2, 3};
  return Container{id, info, 48};
}

Container getList(NodeId id) {
  static ContainerInfo info{"std::list", LIST_TYPE, "list"};
  info.stubTemplateParams = {1};
  return Container{id, info, 24};
}

Container getPair(NodeId id) {
  static ContainerInfo info{"std::pair", PAIR_TYPE, "utility"};
  return Container{id, info, 8};  // Nonsense size, shouldn't matter for tests
}