Organic Maps sources as of 02.04.2025 (fad26bbf22ac3da75e01e62aa01e5c8e11861005)

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coding/coding_tests/file_sort_test.cpp

@@ -0,0 +1,57 @@
+#include "testing/testing.hpp"
+
+#include "coding/file_sort.hpp"
+#include "coding/write_to_sink.hpp"
+#include "coding/reader.hpp"
+
+#include <algorithm>
+#include <cstddef>
+#include <cstdint>
+#include <random>
+#include <vector>
+
+using namespace std;
+
+namespace
+{
+  void TestFileSorter(vector<uint32_t> & data, char const * tmpFileName, size_t bufferSize)
+  {
+    vector<char> serial;
+    typedef MemWriter<vector<char> > MemWriterType;
+    MemWriterType writer(serial);
+    typedef WriterFunctor<MemWriterType> OutT;
+    OutT out(writer);
+    FileSorter<uint32_t, OutT> sorter(bufferSize, tmpFileName, out);
+    for (size_t i = 0; i < data.size(); ++i)
+      sorter.Add(data[i]);
+    sorter.SortAndFinish();
+
+    TEST_EQUAL(serial.size(), data.size() * sizeof(data[0]), ());
+    sort(data.begin(), data.end());
+    MemReader reader(&serial[0], serial.size());
+    TEST_EQUAL(reader.Size(), data.size() * sizeof(data[0]), ());
+    vector<uint32_t> result(data.size());
+    reader.Read(0, &result[0], reader.Size());
+    TEST_EQUAL(result, data, ());
+  }
+}
+
+UNIT_TEST(FileSorter_Smoke)
+{
+  vector<uint32_t> data;
+  data.push_back(2);
+  data.push_back(3);
+  data.push_back(1);
+
+  TestFileSorter(data, "file_sorter_test_smoke.tmp", 10);
+}
+
+UNIT_TEST(FileSorter_Random)
+{
+  mt19937 rng(0);
+  vector<uint32_t> data(1000);
+  for (size_t i = 0; i < data.size(); ++i)
+    data[i] = ((i + 1 % 100) ? rng() : data[i - 20]);
+
+  TestFileSorter(data, "file_sorter_test_random.tmp", data.size() / 10);
+}