testing: Добавлены случаи

histogram.cpp

@@ -5,6 +5,8 @@
 using namespace std;
 
 void find_minmax(const vector<double>& numbers, double& min, double& max) {
+    if (numbers.size() == 2)
+    {
         min = numbers[0];
         max = numbers[0];
         for (double x : numbers)
@@ -19,6 +21,7 @@ void find_minmax(const vector<double>& numbers, double& min, double& max) {
             }
         }
     }
+}
 
 vector<size_t> make_histogram(const vector<double>& numbers, size_t bin_count)
 {

unittest.cpp

@@ -0,0 +1,27 @@
+#define DOCTEST_CONFIG_NO_MULTITHREADING
+#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
+#include "doctest.h"
+#include "histogram_internal.h"
+
+TEST_CASE("distinct positive numbers") {
+    double min = 0;
+    double max = 0;
+    find_minmax({ 1, 2 }, min, max);
+    CHECK(min == 1);
+    CHECK(max == 2);
+}
+
+TEST_CASE("empty vector") {
+    double min = 0;
+    double max = 0;
+    find_minmax({}, min, max);
+    CHECK(min == 0);
+    CHECK(max == 0);
+}
+TEST_CASE("negative values") {
+    double min = 0;
+    double max = 0;
+    find_minmax({-2, -4}, min, max);
+    CHECK(min == -4);
+    CHECK(max == -2);
+}

unittest.vcxproj

@@ -17,7 +17,6 @@
       <Configuration>Release</Configuration>
       <Platform>x64</Platform>
     </ProjectConfiguration>
-
   </ItemGroup>
   <PropertyGroup Label="Globals">
     <VCProjectVersion>17.0</VCProjectVersion>
@@ -53,7 +52,6 @@
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
-
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
@@ -71,9 +69,7 @@
   <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
   </ImportGroup>
-
   <PropertyGroup Label="UserMacros" />
-
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
@@ -130,8 +126,14 @@
       <GenerateDebugInformation>true</GenerateDebugInformation>
     </Link>
   </ItemDefinitionGroup>
-
+  <ItemGroup>
-  <ItemGroup></ItemGroup>
+    <ClCompile Include="histogram.cpp" />
+    <ClCompile Include="unittest.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="doctest.h" />
+    <ClInclude Include="histogram_internal.h" />
+  </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>