word count exercise, initial commit

cpp/word-count/CMakeLists.txt

@@ -0,0 +1,52 @@
+# Get the exercise name from the current directory
+get_filename_component(exercise ${CMAKE_CURRENT_SOURCE_DIR} NAME)
+
+# Basic CMake project
+cmake_minimum_required(VERSION 2.8.11)
+
+# Name the project after the exercise
+project(${exercise} CXX)
+
+# Locate Boost libraries: unit_test_framework, date_time and regex
+set(Boost_USE_STATIC_LIBS ON)
+set(Boost_USE_MULTITHREADED ON)
+set(Boost_USE_STATIC_RUNTIME OFF)
+find_package(Boost 1.55 REQUIRED COMPONENTS unit_test_framework date_time regex)
+
+# Enable C++11 features on gcc/clang
+if("${CMAKE_CXX_COMPILER_ID}" MATCHES "(GNU|Clang)")
+    set(CMAKE_CXX_FLAGS "-std=c++11")
+endif()
+
+# Configure to run all the tests?
+if(${EXERCISM_RUN_ALL_TESTS})
+    add_definitions(-DEXERCISM_RUN_ALL_TESTS)
+endif()
+
+# Get a source filename from the exercise name by replacing -'s with _'s
+string(REPLACE "-" "_" file ${exercise})
+
+# Implementation could be only a header
+if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/${file}.cpp)
+    set(exercise_cpp ${file}.cpp)
+else()
+    set(exercise_cpp "")
+endif()
+
+# Build executable from sources and headers
+add_executable(${exercise} ${file}_test.cpp ${exercise_cpp} ${file}.h)
+
+# We need boost includes
+target_include_directories(${exercise} PRIVATE ${Boost_INCLUDE_DIRS})
+
+# We need boost libraries
+target_link_libraries(${exercise} ${Boost_LIBRARIES})
+
+# Tell MSVC not to warn us about unchecked iterators in debug builds
+if(${MSVC})
+    set_target_properties(${exercise} PROPERTIES
+        COMPILE_DEFINITIONS_DEBUG _SCL_SECURE_NO_WARNINGS)
+endif()
+
+# Run the tests on every build
+add_custom_command(TARGET ${exercise} POST_BUILD COMMAND ${exercise})

cpp/word-count/README.md

@@ -0,0 +1,49 @@
+# Word Count
+
+Write a program that given a phrase can count the occurrences of each word in that phrase.
+
+For example for the input `"olly olly in come free"`
+
+```plain
+olly: 2
+in: 1
+come: 1
+free: 1
+```
+
+
+## Getting Started
+
+Make sure you have read the [getting started with C++](http://help.exercism.io/getting-started-with-cpp.html)
+page on the [exercism help site](http://help.exercism.io/).  This covers
+the basic information on setting up the development environment expected
+by the exercises.
+
+## Passing the Tests
+
+Get the first test compiling, linking and passing by following the [three
+rules of test-driven development](http://butunclebob.com/ArticleS.UncleBob.TheThreeRulesOfTdd).
+Create just enough structure by declaring namespaces, functions, classes,
+etc., to satisfy any compiler errors and get the test to fail.  Then write
+just enough code to get the test to pass.  Once you've done that,
+uncomment the next test by moving the following line past the next test.
+
+```C++
+#if defined(EXERCISM_RUN_ALL_TESTS)
+```
+
+This may result in compile errors as new constructs may be invoked that
+you haven't yet declared or defined.  Again, fix the compile errors minimally
+to get a failing test, then change the code minimally to pass the test,
+refactor your implementation for readability and expressiveness and then
+go on to the next test.
+
+Try to use standard C++11 facilities in preference to writing your own
+low-level algorithms or facilities by hand.  [CppReference](http://en.cppreference.com/)
+is a wiki reference to the C++ language and standard library.  If you
+are new to C++, but have programmed in C, beware of
+[C traps and pitfalls](http://www.slideshare.net/LegalizeAdulthood/c-traps-and-pitfalls-for-c-programmers).
+
+## Source
+
+This is a classic toy problem, but we were reminded of it by seeing it in the Go Tour. [view source]()

cpp/word-count/word_count.cpp

@@ -0,0 +1,12 @@
+#include "word_count.h"
+
+namespace word_count {
+
+using namespace std;
+
+Words words(const string &str)
+{
+    return Words();
+}
+
+}

cpp/word-count/word_count.h

@@ -0,0 +1,12 @@
+#pragma once
+
+#include <map>
+#include <string>
+
+namespace word_count {
+
+typedef std::map<std::string, size_t> Words;
+
+Words words(const std::string&);
+
+}

cpp/word-count/word_count_test.cpp

@@ -0,0 +1,136 @@
+#include "word_count.h"
+#define BOOST_TEST_MAIN
+#include <boost/test/unit_test.hpp>
+#include <map>
+
+using namespace std;
+
+namespace boost
+{
+
+// teach Boost.Test how to print std::pair
+template <typename K, typename V>
+inline wrap_stringstream&
+operator<<(wrap_stringstream& wrapped, std::pair<const K, V> const& item)
+{
+    return wrapped << '<' << item.first << ',' << item.second << '>';
+}
+
+}
+
+#define REQUIRE_EQUAL_CONTAINERS(left_, right_) \
+    BOOST_REQUIRE_EQUAL_COLLECTIONS(left_.begin(), left_.end(), right_.begin(), right_.end())
+
+BOOST_AUTO_TEST_CASE(counts_one_word)
+{
+    const map<string, int> expected{{"word", 1}};
+
+    const auto actual = word_count::words("word");
+
+    REQUIRE_EQUAL_CONTAINERS(expected, actual);
+}
+
+#if defined(EXERCISM_RUN_ALL_TESTS)
+BOOST_AUTO_TEST_CASE(counts_one_of_each)
+{
+    const map<string, int> expected{{"one", 1}, {"of", 1}, {"each", 1}};
+
+    const auto actual = word_count::words("one of each");
+
+    REQUIRE_EQUAL_CONTAINERS(expected, actual);
+}
+
+BOOST_AUTO_TEST_CASE(counts_multiple_occurrences)
+{
+    const map<string, int> expected{{"one", 1}, {"fish", 4}, {"two", 1}, {"red", 1}, {"blue", 1}};
+
+    const auto actual = word_count::words("one fish two fish red fish blue fish");
+
+    REQUIRE_EQUAL_CONTAINERS(expected, actual);
+}
+
+BOOST_AUTO_TEST_CASE(ignores_punctuation)
+{
+    const map<string, int> expected{{"car", 1}, {"carpet", 1}, {"as", 1}, {"java", 1}, {"javascript", 1}};
+
+    const auto actual = word_count::words("car : carpet as java : javascript!!&@$%^&");
+
+    REQUIRE_EQUAL_CONTAINERS(expected, actual);
+}
+
+BOOST_AUTO_TEST_CASE(includes_numbers)
+{
+    const map<string, int> expected{{"testing", 2}, {"1", 1}, {"2", 1}};
+
+    const auto actual = word_count::words("testing, 1, 2 testing");
+
+    REQUIRE_EQUAL_CONTAINERS(expected, actual);
+}
+
+BOOST_AUTO_TEST_CASE(normalizes_case)
+{
+    const map<string, int> expected{{"go", 3}};
+
+    const auto actual = word_count::words("go Go GO");
+
+    REQUIRE_EQUAL_CONTAINERS(expected, actual);
+}
+
+BOOST_AUTO_TEST_CASE(counts_constructor)
+{
+    const map<string, int> expected{{"constructor", 2}};
+
+    const auto actual = word_count::words("constructor Constructor");
+
+    REQUIRE_EQUAL_CONTAINERS(expected, actual);
+}
+
+BOOST_AUTO_TEST_CASE(counts_multiline)
+{
+    const map<string, int> expected{{"hello", 1}, {"world", 1}};
+
+    const auto actual = word_count::words("hello\nworld");
+
+    REQUIRE_EQUAL_CONTAINERS(expected, actual);
+}
+
+BOOST_AUTO_TEST_CASE(count_everything_just_once)
+{
+    const map<string, int> expected{{"all", 2}, {"the", 2}, {"kings", 2}, {"horses", 1}, {"and", 1}, {"men", 1}};
+    const auto actual = word_count::words("all the kings horses and all the kings men");
+    
+    REQUIRE_EQUAL_CONTAINERS(expected, actual);
+}
+
+BOOST_AUTO_TEST_CASE(handles_cramped_list)
+{
+    const map<string, int> expected{{"one", 1}, {"two", 1}, {"three", 1}};
+    const auto actual = word_count::words("one,two,three");
+
+    REQUIRE_EQUAL_CONTAINERS(expected, actual);
+}
+
+BOOST_AUTO_TEST_CASE(with_apostrophes)
+{
+    const map<string, int> expected{{"first", 1}, {"don't", 2}, {"laugh", 1}, {"then", 1}, {"cry", 1}};
+    const auto actual = word_count::words("First: don't laugh. Then: don't cry.");
+
+    REQUIRE_EQUAL_CONTAINERS(expected, actual);
+}
+
+BOOST_AUTO_TEST_CASE(with_free_standing_apostrophes)
+{
+    const map<string, int> expected{{ "go", 3 }};
+    const auto actual = word_count::words("go ' Go '' GO");
+
+    REQUIRE_EQUAL_CONTAINERS(expected, actual);
+}
+
+BOOST_AUTO_TEST_CASE(with_apostrophes_as_quotes)
+{
+    const map<string, int> expected{{"she", 1}, {"said", 1}, {"let's", 1}, {"meet", 1}, {"at", 1}, {"twelve", 1}, {"o'clock", 1}};
+    const auto actual = word_count::words("She said, 'let's meet at twelve o'clock'");
+
+    REQUIRE_EQUAL_CONTAINERS(expected, actual);
+}
+#endif