getting started

Hw4/TestPerformance.cpp

@@ -0,0 +1,54 @@
+#include "sortutils.hpp"
+
+#include "gtest/gtest.h"
+#include <algorithm>
+#include <random>
+
+constexpr auto MIN_VALUE = -10'000'000;
+constexpr auto MAX_VALUE = 10'000'000;
+
+int main(int argc, char* argv[])
+{
+    testing::InitGoogleTest(&argc, argv);
+    return RUN_ALL_TESTS();
+}
+
+SourceArray generateRandomArray()
+{
+    std::default_random_engine engine{0u};
+    std::uniform_int_distribution<> dist{MIN_VALUE, MAX_VALUE};
+
+    SourceArray array;
+    std::generate(array.begin(), array.end(), [&] { return dist(engine); });
+    return array;
+}
+
+TEST(OrganPipeArray, DoesGenerateCorrectly)
+{
+    auto sourceArray = generateRandomArray();
+    std::sort(sourceArray.begin(), sourceArray.end());
+    auto array = sourceArray;
+    organPipeStdArray(array);
+
+    for (auto i = 0ul; i < sourceArray.size() / 2; i++)
+    {
+        ASSERT_EQ(sourceArray[i], array[i]) << "Organ pipe changed first half of array at position " << i;
+    }
+
+    for (std::size_t first = 0ul, second = array.size() - 1; first < second; first++, second--)
+    {
+        ASSERT_EQ(array[first], array[second]) << "Organ pipe not symmetric at positions " << first << " and " << second;
+    }
+}
+
+TEST(RawArray, DoesInitializeFromStdArrayCorrectly)
+{
+    const auto sourceArray = generateRandomArray();
+    int dest[sourceArray.size()];
+    initializeRawArrayFromStdArray(sourceArray, dest);
+
+    for (auto i = 0ul; i < sourceArray.size(); i++)
+    {
+        ASSERT_EQ(sourceArray[i], dest[i]) << "Raw array differs from source array at position " << i;
+    }
+}