Function ExpectVectorContainsUnordered

internal/ceres/problem_test.cc:981–1002

// Check that a null-terminated array, a, has the same elements as b.
template <typename T>
void ExpectVectorContainsUnordered(const T* a, const std::vector<T>& b) {
  // Compute the size of a.
  int size = 0;
  while (a[size]) {
    ++size;
  }
  ASSERT_EQ(size, b.size());

  // Sort a.
  std::vector<T> a_sorted(size);
  copy(a, a + size, a_sorted.begin());
  sort(a_sorted.begin(), a_sorted.end());

  // Sort b.
  std::vector<T> b_sorted(b);
  sort(b_sorted.begin(), b_sorted.end());

  // Compare.
  for (int i = 0; i < size; ++i) {
    EXPECT_EQ(a_sorted[i], b_sorted[i]);
  }
}

static void ExpectProblemHasResidualBlocks(
    const ProblemImpl& problem,