4 (5).3: create unittest

histogram.cpp

@@ -0,0 +1,45 @@
+#include <iostream>
+#include <vector>
+#include <cmath>
+#include "histogram.h"
+using namespace std;
+
+
+void find_minmax(const vector<double>& numbers, double& mini, double& maxi) {
+
+    mini = numbers[0];
+    maxi = numbers[0];
+    for (double x : numbers) {
+        if (x < mini) {
+            mini = x;
+        }
+        else if (x > maxi) {
+            maxi = x;
+        }
+    }
+}
+vector<size_t>
+make_histogram(const vector<double>& numbers, size_t bin_count) {
+    double mini, maxi;
+    find_minmax(numbers, mini, maxi);
+
+    vector<size_t> bins(bin_count);
+
+    double bin_size = (maxi - mini) / bin_count;
+    for (double num : numbers) {
+        bool found = false;
+        for (size_t j = 0; (j < bin_count - 1) && !found; j++){
+            auto lo = mini + j * bin_size;
+            auto hi = mini + (j + 1) * bin_size;
+            if ((lo <= num) && (num < hi)) {
+                bins[j]++;
+                found = true;
+            }
+        }
+        if (!found) {
+            bins[bin_count - 1]++;
+        }
+    }
+
+    return bins;
+}

histogram.h

@@ -0,0 +1,5 @@
+#pragma once
+#include <vector>
+
+std::vector<size_t>
+make_histogram(const std::vector<double>& numbers, size_t bin_count);

histogram_internal.h

@@ -0,0 +1,5 @@
+#pragma once
+#include <vector>
+
+void
+find_minmax(const std::vector<double>& numbers, double& mini, double& maxi);

main.cpp

@@ -1,87 +1,42 @@
 #include <iostream>
 #include <vector>
 #include <cmath>
+#include "histogram.h"
+#include "text.h"
 using namespace std;
 
 const size_t SCREEN_WIDTH = 80;
 const size_t MAX_ASTERISK = SCREEN_WIDTH - 4;
 
-int main() {
+struct Input {
+    vector<double> numbers;
+    size_t bin_count{};
+};
 
+Input
+input_data() {
     size_t number_count;
     cerr << "Enter number count: ";
     cin >> number_count;
 
-    vector<double> numbers(number_count);
+    Input in;
+    in.numbers.resize(number_count);
     cerr << "Enter massive elements: ";
     for (size_t i = 0; i < number_count; i++) {
-        cin >> numbers[i];
+        cin >> in.numbers[i];
     }
 
-    size_t bin_count;
+    in.bin_count; //ÇÀ×ÅÌ
     cerr << "Enter bin count: ";
-    cin >> bin_count;
-
-    vector<size_t> bins(bin_count);
-
-    double mini = numbers[0];
-    double maxi = numbers[0];
-    for (double x : numbers) {
-        if (x < mini) {
-            mini = x;
-        }
-        else if (x > maxi) {
-            maxi = x;
-        }
-    }
-
-    double bin_size = (maxi - mini) / bin_count;
-    for (size_t i = 0; i < number_count; i++) {
-        bool found = false;
-        for (size_t j = 0; (j < bin_count - 1) && !found; j++){
-            auto lo = mini + j * bin_size;
-            auto hi = mini + (j + 1) * bin_size;
-            if ((lo <= numbers[i]) && (numbers[i] < hi)) {
-                bins[j]++;
-                found = true;
-            }
-        }
-        if (!found) {
-            bins[bin_count - 1]++;
-        }
-    }
-
-
-
-   size_t max_count = bins[0];
-        for (size_t i = 0; i < bin_count; i++) {
-            if (bins[i]>max_count) {
-             max_count = bins[i];
-            }
-        }
-
-    vector<size_t> height(bin_count);
-    for (size_t i = 0; i < bin_count; i++) {
-        if (max_count > MAX_ASTERISK) {
-            height[i] = round(MAX_ASTERISK * (static_cast<double>(bins[i]) / max_count));
-        } else {
-            height[i]=bins[i];
-        }
-    }
+    cin >> in.bin_count;
+    return in;
+}
 
-    for (size_t i = 0; i < bin_count; i++) {
-            if (bins[i] < 10) {
-              cout << "  ";
-            } else if (bins[i] < 100) {
-                cout << " ";
-            }
-        cout << bins[i] << "| ";
 
+int main() {
+    auto in = input_data();
+    auto bins = make_histogram(in.numbers, in.bin_count);
+    show_histogram_text(bins, in.bin_count);
 
-        for (size_t j = 0; j<height[i]; j++) {
-            cout <<" * ";
-        }
-        cout << endl;
-    }
+    return 0;
 }
-

text.cpp

@@ -0,0 +1,38 @@
+#include <iostream>
+#include <vector>
+#include <cmath>
+#include "text.h"
+using namespace std;
+
+void
+show_histogram_text(const vector<size_t>& bins, size_t bin_count) {
+    size_t max_count = bins[0];
+    for (size_t i = 0; i < bin_count; i++) {
+        if (bins[i] > max_count) {
+            max_count = bins[i];
+        }
+    }
+
+    vector<size_t> height(bin_count);
+    for (size_t i = 0; i < bin_count; i++) {
+        if (max_count > MAX_ASTERISK) {
+            height[i] = round(MAX_ASTERISK * (static_cast<double>(bins[i]) / max_count));
+        } else {
+            height[i] = bins[i];
+        }
+    }
+
+    for (size_t i = 0; i < bin_count; i++) {
+        if (bins[i] < 10) {
+            cout << "  ";
+        } else if (bins[i] < 100) {
+            cout << " ";
+        }
+        cout << bins[i] << "| ";
+
+        for (size_t j = 0; j < height[i]; j++) {
+            cout << " * ";
+        }
+        cout << endl;
+    }
+}

text.h

@@ -0,0 +1,5 @@
+#pragma once
+#include <vector>
+
+void
+show_histogram_text(const vector<size_t>& bins, size_t bin_count);

unittest.cbp

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
+<CodeBlocks_project_file>
+	<FileVersion major="1" minor="6" />
+	<Project>
+		<Option title="unittest" />
+		<Option pch_mode="2" />
+		<Option compiler="gcc" />
+		<Build>
+			<Target title="Debug">
+				<Option output="bin/Debug/unittest" prefix_auto="1" extension_auto="1" />
+				<Option object_output="obj/Debug/" />
+				<Option type="1" />
+				<Option compiler="gcc" />
+				<Compiler>
+					<Add option="-g" />
+				</Compiler>
+			</Target>
+			<Target title="Release">
+				<Option output="bin/Release/unittest" prefix_auto="1" extension_auto="1" />
+				<Option object_output="obj/Release/" />
+				<Option type="1" />
+				<Option compiler="gcc" />
+				<Compiler>
+					<Add option="-O2" />
+				</Compiler>
+				<Linker>
+					<Add option="-s" />
+				</Linker>
+			</Target>
+		</Build>
+		<Compiler>
+			<Add option="-Wall" />
+		</Compiler>
+		<Extensions>
+			<lib_finder disable_auto="1" />
+		</Extensions>
+	</Project>
+</CodeBlocks_project_file>

unittest.cpp

@@ -0,0 +1,60 @@
+#define DOCTEST_CONFIG_NO_MULTITHREADING
+#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
+#include "doctest.h"
+#include "histogram_internal.h"
+
+TEST_CASE("distinct positive numbers") {
+    double mini = 0;
+    double maxi = 0;
+    find_minmax({1, 2}, mini, maxi);
+    CHECK(mini == 1);
+    CHECK(maxi == 2);
+}
+
+TEST_CASE("empty vector") {
+    double mini = 0;
+    double maxi = 0;
+    find_minmax({1, 2}, mini, maxi);
+    CHECK(mini == 1);
+    CHECK(maxi == 2);
+}
+
+TEST_CASE("vector with one element") {
+    double mini = 0;
+    double maxi = 0;
+    find_minmax({1}, mini, maxi);
+    CHECK(mini == 1);
+    CHECK(maxi == 1);
+}
+
+TEST_CASE("vector with negative elements") {
+    double mini = 0;
+    double maxi = 0;
+    find_minmax({-1, -2}, mini, maxi);
+    CHECK(mini == -2);
+    CHECK(maxi == -1);
+}
+
+TEST_CASE("vector with equivalent elements") {
+    double mini = 0;
+    double maxi = 0;
+    find_minmax({2, 2}, mini, maxi);
+    CHECK(mini == 2);
+    CHECK(maxi == 2);
+}
+
+TEST_CASE("vector with 0") {
+    double mini = 0;
+    double maxi = 0;
+    find_minmax({0, 0}, mini, maxi);
+    CHECK(mini == 0);
+    CHECK(maxi == 0);
+}
+
+TEST_CASE("vector with fractional numbers") {
+    double mini = 0;
+    double maxi = 0;
+    find_minmax({2.4, 2.2}, mini, maxi);
+    CHECK(mini == 2.2);
+    CHECK(maxi == 2.4);
+}