add tests

Programm/03-scaling.input.txt

@@ -0,0 +1,5 @@
+142
+1 1 1 1 1 1 1 1 1 
+2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 
+3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 
+3

Programm/histogram.cpp

@@ -1,4 +1,5 @@
 #include "histogram.h"
+// #include "histogram_internal.h"
 
 void find_minmax(const std::vector<double> &numbers, double &min, double &max)
 {

Programm/histogram_internal.h

@@ -1,6 +0,0 @@
-#ifndef HISTOGRAM_INTERNAL_H
-#define HISTOGRAM_INTERNAL_H
-#include <vector>
-
-void find_minmax(const std::vector<double> &numbers, double &min, double &max);
-#endif

Programm/marks.svg

@@ -0,0 +1,3 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<svg width='400' height='300' viewBox='0 0 400 300' xmlns='http://www.w3.org/2000/svg'>
+<text x='20' y='20'>9</text><rect x='50' y='0' width='18' height='30' stroke='blue' fill='#aaffaa '/><text x='350' y='20'>6%</text><text x='20' y='50'>33</text><rect x='50' y='30' width='66' height='30' stroke='blue' fill='#aaffaa '/><text x='350' y='50'>23%</text><text x='20' y='80'>100</text><rect x='50' y='60' width='200' height='30' stroke='blue' fill='#aaffaa '/><text x='350' y='80'>71%</text></svg>

Programm/marks.txt

@@ -1,3 +1,3 @@
-10
-3 3 4 4 4 4 4 5 5 5
+12
+1 1 1 1 2 2 2 2 2 3 3 3 
 3

Programm/marks11.txt

@@ -0,0 +1,3 @@
+ 2|** 18%
+ 5|***** 45%
+ 4|**** 36%

Programm/svg.cpp

@@ -1,4 +1,5 @@
 #include "svg.h"
+
 void svg_text(double left, double baseline, std::string text);
 
 void svg_begin(double width, double height)
@@ -27,7 +28,7 @@ void svg_rect(double x, double y, double width, double height, std::string strok
               << "' height='" << height << "' stroke='" << stroke << "' fill='" << fill << " '/>";
 }
 
-void show_histogram_svg(const std::vector<size_t> &bins)
+double show_histogram_svg(const std::vector<size_t> &bins)
 {
     const auto IMAGE_WIDTH = 400;
     const auto IMAGE_HEIGHT = 300;
@@ -45,9 +46,9 @@ void show_histogram_svg(const std::vector<size_t> &bins)
         if (bin > max_count)
             max_count = bin;
     }
-    const auto BLOCK_WIDTH = (IMAGE_WIDTH - TEXT_WIDTH * 2 - TEXT_LEFT) / max_count;
+    const auto BLOCK_WIDTH = (IMAGE_WIDTH - TEXT_WIDTH * 2  - TEXT_LEFT) / max_count;
     const auto TEXT_RATIO_SHIFT = IMAGE_WIDTH - TEXT_WIDTH;
-    auto summ = 0;
+    double summ = 0, ratio_summ = 0;
     for (size_t bin : bins)
     {
         summ += bin;
@@ -58,10 +59,12 @@ void show_histogram_svg(const std::vector<size_t> &bins)
         const double bin_width = BLOCK_WIDTH * bin;
         svg_text(TEXT_LEFT, top + TEXT_BASELINE, std::to_string(bin));
         svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT, "blue", "#aaffaa");
-        auto ratio = (bin * 100) / summ;
-        if (bin == bins.back() && summ % 2 != 0)
+        int ratio = (bin * 100) / summ;
+        ratio_summ += ratio;
+        if (bin == bins.back() && ratio_summ != 100)
         {
             ratio ++;
+            ratio_summ ++;
         }
         svg_text(TEXT_RATIO_SHIFT, top + TEXT_BASELINE, (std::to_string(ratio) + "%"));
         top += BIN_HEIGHT;
@@ -69,4 +72,5 @@ void show_histogram_svg(const std::vector<size_t> &bins)
     // svg_text(20, 20, std::to_string(bins[0]));
     // svg_rect(50, 0, bins[0] * 10, 30);
     svg_end();
+    return ratio_summ;
 }

Programm/svg.h

@@ -3,5 +3,5 @@
 #include <iostream>
 #include <vector>
 
-void show_histogram_svg(const std::vector<size_t> &bins);
+double show_histogram_svg(const std::vector<size_t> &bins);
 #endif

Unittests/histogram.cpp

@@ -0,0 +1,51 @@
+#include "histogram_internal.h"
+
+bool find_minmax(const std::vector<double> &numbers, double &min, double &max)
+{
+    if(numbers.empty()){
+        return false;
+    }
+    min = numbers[0];
+    max = numbers[0];
+    for (double x : numbers)
+    {
+        if (x < min)
+        {
+            min = x;
+        }
+        else if (x > max)
+        {
+            max = x;
+        }
+    }
+    return true;
+}
+
+std::vector<size_t> make_histogram(const std::vector<double> &numbers, const size_t &bin_count)
+{
+    double min, max;
+    find_minmax(numbers, min, max);
+
+    std::vector<size_t> bins(bin_count);
+    double bin_size = (max - min) / bin_count;
+
+    for (size_t i = 0; i < numbers.size(); i++)
+    {
+        bool found = false;
+        for (size_t j = 0; (j < bin_count - 1) && !found; j++)
+        {
+            auto lo = min + j * bin_size;
+            auto hi = min + (j + 1) * bin_size;
+            if ((lo <= numbers[i]) && (numbers[i] <= hi))
+            {
+                bins[j]++;
+                found = true;
+            }
+        }
+        if (!found)
+        {
+            bins[bin_count - 1]++;
+        }
+    }
+    return bins;
+}

Unittests/histogram_internal.h

@@ -1,6 +1,7 @@
-#ifndef HISTOGRAM_INTERNAL_H
-#define HISTOGRAM_INTERNAL_H
+#ifndef HISTOGRAM_INTERNAL_H_INCLUDED
+#define HISTOGRAM_INTERNAL_H_INCLUDED
 #include <vector>
 
-void find_minmax(const std::vector<double> &numbers, double &min, double &max);
+bool find_minmax(const std::vector<double> &numbers, double &min, double &max);
+double show_histogram_svg(const std::vector<size_t> &bins);
 #endif

Unittests/svg.cpp

@@ -0,0 +1,78 @@
+#include "histogram_internal.h"
+#include <iostream>
+#include <vector>
+
+void svg_text(double left, double baseline, std::string text);
+
+void svg_begin(double width, double height)
+{
+    std::cout << "<?xml version='1.0' encoding='UTF-8'?>\n";
+    std::cout << "<svg ";
+    std::cout << "width='" << width << "' ";
+    std::cout << "height='" << height << "' ";
+    std::cout << "viewBox='0 0 " << width << " " << height << "' ";
+    std::cout << "xmlns='http://www.w3.org/2000/svg'>\n";
+}
+
+void svg_end()
+{
+    std::cout << "</svg>\n";
+}
+
+void svg_text(double left, double baseline, std::string text)
+{
+    std::cout << "<text x='" << left << "' y='" << baseline << "'>" << text << "</text>";
+}
+
+void svg_rect(double x, double y, double width, double height, std::string stroke = "black", std::string fill = "black")
+{
+    std::cout << "<rect x='" << x << "' y='" << y << "' width='" << width
+              << "' height='" << height << "' stroke='" << stroke << "' fill='" << fill << " '/>";
+}
+
+double show_histogram_svg(const std::vector<size_t> &bins)
+{
+    const auto IMAGE_WIDTH = 400;
+    const auto IMAGE_HEIGHT = 300;
+    const auto TEXT_LEFT = 20;
+    const auto TEXT_BASELINE = 20;
+    const auto TEXT_WIDTH = 50;
+    const auto BIN_HEIGHT = 30;
+
+    svg_begin(400, 300);
+    double top = 0;
+
+    size_t max_count = 0;
+    for (auto bin : bins)
+    {
+        if (bin > max_count)
+            max_count = bin;
+    }
+    const auto BLOCK_WIDTH = (IMAGE_WIDTH - TEXT_WIDTH * 2 - TEXT_LEFT) / max_count;
+    const auto TEXT_RATIO_SHIFT = IMAGE_WIDTH - TEXT_WIDTH;
+    double summ = 0, ratio_summ = 0;
+    for (size_t bin : bins)
+    {
+        summ += bin;
+    }
+
+    for (size_t bin : bins)
+    {
+        const double bin_width = BLOCK_WIDTH * bin;
+        svg_text(TEXT_LEFT, top + TEXT_BASELINE, std::to_string(bin));
+        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT, "blue", "#aaffaa");
+        int ratio = (bin * 100) / summ;
+        ratio_summ += ratio;
+        if (bin == bins.back() && ratio_summ != 100)
+        {
+            ratio++;
+            ratio_summ++;
+        }
+        svg_text(TEXT_RATIO_SHIFT, top + TEXT_BASELINE, (std::to_string(ratio) + "%"));
+        top += BIN_HEIGHT;
+    }
+    // svg_text(20, 20, std::to_string(bins[0]));
+    // svg_rect(50, 0, bins[0] * 10, 30);
+    svg_end();
+    return ratio_summ;
+}

Unittests/unittest.cpp

@@ -1,12 +1,58 @@
 #define DOCTEST_CONFIG_NO_MULTITHREADING
 #define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
 #include "doctest.h"
+#include <vector>
 #include "histogram_internal.h"
 
-TEST_CASE("distinct positive numbers") {
+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("only one vector in numbers")
+{
+    double min = 0;
+    double max = 0;
+    find_minmax({1}, min, max);
+    CHECK(min == 1);
+    CHECK(max == 1);
+}
+
+TEST_CASE("distinct negative numbers")
+{
+    double min = 0;
+    double max = 0;
+    find_minmax({-1, -100, -30, -40}, min, max);
+    CHECK(min == -100);
+    CHECK(max == -1);
+}
+
+TEST_CASE("vector of indentical elements")
+{
+    double min = 0;
+    double max = 0;
+    find_minmax({5, 5, 5, 5}, min, max);
+    CHECK(min == 5);
+    CHECK(max == 5);
+}
+
+TEST_CASE("vector of indentical elements")
+{
+    double min = 0;
+    double max = 0;
+    CHECK(find_minmax({}, min, max) == false);
+}
+
+
+TEST_CASE("vector of indentical elements")
+{
+    auto summ = 0;
+    summ = show_histogram_svg({1, 2, 4});
+    CHECK(summ == 100);
+}
+
+

Unittests/unittest.dSYM/Contents/Info.plist

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+	<dict>
+		<key>CFBundleDevelopmentRegion</key>
+		<string>English</string>
+		<key>CFBundleIdentifier</key>
+		<string>com.apple.xcode.dsym.unittest</string>
+		<key>CFBundleInfoDictionaryVersion</key>
+		<string>6.0</string>
+		<key>CFBundlePackageType</key>
+		<string>dSYM</string>
+		<key>CFBundleSignature</key>
+		<string>????</string>
+		<key>CFBundleShortVersionString</key>
+		<string>1.0</string>
+		<key>CFBundleVersion</key>
+		<string>1</string>
+	</dict>
+</plist>