From 9d7729e0e74f2a2ed13d7ede16c98af9d9974e80 Mon Sep 17 00:00:00 2001
From: Daniil <KantimirovDD@mpei.ru>
Date: Sun, 4 May 2025 17:26:51 +0300
Subject: [PATCH] =?UTF-8?q?code:=20=D0=9C=D0=BE=D0=B4=D1=83=D0=BB=D1=8C?=
 =?UTF-8?q?=D0=BD=D1=8B=D0=B5=20=D1=82=D0=B5=D1=81=D1=82=D1=8B?=
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---
 histogram.cpp        |  2 +-
 histogram_internal.h |  4 ++++
 unittest.cpp         | 45 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 50 insertions(+), 1 deletion(-)
 create mode 100644 histogram_internal.h
 create mode 100644 unittest.cpp

diff --git a/histogram.cpp b/histogram.cpp
index 0c923b3..ca1dd20 100644
--- a/histogram.cpp
+++ b/histogram.cpp
@@ -4,7 +4,7 @@
 
 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)
 {
     min = numbers[0];
     max = numbers[0];
diff --git a/histogram_internal.h b/histogram_internal.h
new file mode 100644
index 0000000..ac2f4af
--- /dev/null
+++ b/histogram_internal.h
@@ -0,0 +1,4 @@
+#pragma once
+#include <vector>
+
+void find_minmax(const std::vector <double> &numbers, double &min, double &max);
diff --git a/unittest.cpp b/unittest.cpp
new file mode 100644
index 0000000..c6d4f3f
--- /dev/null
+++ b/unittest.cpp
@@ -0,0 +1,45 @@
+#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("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("vector of the one elements")
+{
+    double min = 0;
+    double max = 0;
+    find_minmax({3}, min, max);
+    CHECK(min == max);
+}
+TEST_CASE("positive and negative numbers")
+{
+    double min = 0;
+    double max = 0;
+    find_minmax({-1, 2, 0, -3, 5}, min, max);
+    CHECK(min == -3);
+    CHECK(max == 5);
+}