Solve 'Create Phone Number' kata (#6)

Author: borisskert

include/create_phone_number/create_phone_number.h

@@ -0,0 +1,8 @@
+#ifndef CPP_KATAS_CREATE_PHONE_NUMBER_H
+#define CPP_KATAS_CREATE_PHONE_NUMBER_H
+
+#include <string>
+
+std::string createPhoneNumber(const int arr[10]);
+
+#endif //CPP_KATAS_CREATE_PHONE_NUMBER_H

src/create_phone_number/create_phone_number.cpp

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+#include <string>
+#include <sstream>
+
+/*
+ * https://www.codewars.com/kata/525f50e3b73515a6db000b83/train/cpp
+ */
+
+static char int_to_digit(int i);
+
+std::string createPhoneNumber(const int arr[10]) {
+    std::stringstream stream;
+
+    stream.put('(');
+    stream.put(int_to_digit(arr[0]));
+    stream.put(int_to_digit(arr[1]));
+    stream.put(int_to_digit(arr[2]));
+    stream.put(')');
+
+    stream.put(' ');
+
+    stream.put(int_to_digit(arr[3]));
+    stream.put(int_to_digit(arr[4]));
+    stream.put(int_to_digit(arr[5]));
+
+    stream.put('-');
+
+    stream.put(int_to_digit(arr[6]));
+    stream.put(int_to_digit(arr[7]));
+    stream.put(int_to_digit(arr[8]));
+    stream.put(int_to_digit(arr[9]));
+
+    return stream.str();
+}
+
+static char int_to_digit(int i) {
+    return (char) (i + '0');
+}

test/create_phone_number/create_phone_number_test.cpp

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+#include <igloo/igloo_alt.h>
+#include "create_phone_number/create_phone_number.h"
+
+using namespace igloo;
+
+Describe(CreatePhoneNumber) {
+    It(BasicTests1) {
+        static const int arr[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 0};
+        Assert::That(createPhoneNumber(arr), Equals("(123) 456-7890"));
+    }
+
+    It(BasicTests2) {
+        static const int arr[10] = {1, 1, 1, 1, 1, 1, 1, 1, 1, 1};
+        Assert::That(createPhoneNumber(arr), Equals("(111) 111-1111"));
+    }
+
+    It(BasicTests3) {
+        static const int arr[10] = {1, 2, 3, 4, 5, 6, 8, 8, 0, 0};
+        Assert::That(createPhoneNumber(arr), Equals("(123) 456-8800"));
+    }
+
+    It(BasicTests4) {
+        static const int arr[10] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+        Assert::That(createPhoneNumber(arr), Equals("(000) 000-0000"));
+    }
+};