Доп тесты

histogram.cpp

@@ -2,9 +2,15 @@
 #include <vector>
 using namespace std;
 
-static void find_minmax(const vector<double>& numbers, double& min, double& max) {
+void find_minmax(const vector<double>& numbers, double& min, double& max) {
+    if (numbers.empty())
+    {
+        min = 0;
+        max = 0;
+        return;
+    }
     max = numbers[0];
-    min = numbers[1];
+    min = numbers[0];
     for (double x : numbers) {
         if (x < min) min = x;
         else if (x > max) max = x;

histogram_internal.h

@@ -0,0 +1,7 @@
+#ifndef HISTOGRAM_INTERNAL_H_INCLUDED
+#define HISTOGRAM_INTERNAL_H_INCLUDED
+
+void find_minmax(const std::vector<double>& numbers, double& min, double& max);
+
+#endif
+

unittest.cpp

@@ -0,0 +1,44 @@
+#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("distinct negative numbers"){
+    double min = 0;
+    double max = 0;
+    find_minmax({-1, -2}, min, max);
+    CHECK(min == -2);
+    CHECK(max == -1);
+}
+TEST_CASE("vector of the same elements"){
+    double min = 0;
+    double max = 0;
+    find_minmax({3,3,3}, min, max);
+    CHECK(min == 3);
+    CHECK(max == 3);
+}
+
+TEST_CASE("single element vector") {
+    double min = 0;
+    double max = 0;
+    find_minmax({7}, min, max);
+    CHECK(min == 7);
+    CHECK(max == 7);
+}
+
+TEST_CASE("empty vector") {
+    double min = 0;
+    double max = 0;
+    find_minmax({}, min, max);
+    CHECK(min == 0);
+    CHECK(max == 0);
+}