beer_song: initial commit

cpp/beer-song/beer_song_test.cpp

@@ -0,0 +1,62 @@
+#include "beer_song.h"
+#define BOOST_TEST_MAIN
+#include <boost/test/unit_test.hpp>
+
+using namespace std;
+
+BOOST_AUTO_TEST_CASE(prints_an_arbitrary_verse)
+{
+    string expected = "8 bottles of beer on the wall, 8 bottles of beer.\n"
+        "Take one down and pass it around, 7 bottles of beer on the wall.\n";
+
+    BOOST_REQUIRE_EQUAL(expected, beer::verse(8));
+}
+
+#if defined(EXERCISM_RUN_ALL_TESTS)
+BOOST_AUTO_TEST_CASE(handles_1_bottle)
+{
+    string expected = "1 bottle of beer on the wall, 1 bottle of beer.\n"
+        "Take it down and pass it around, no more bottles of beer on the wall.\n";
+
+    BOOST_REQUIRE_EQUAL(expected, beer::verse(1));
+}
+
+BOOST_AUTO_TEST_CASE(handles_0_bottles)
+{
+    string expected = "No more bottles of beer on the wall, no more bottles of beer.\n"
+        "Go to the store and buy some more, 99 bottles of beer on the wall.\n";
+
+    BOOST_REQUIRE_EQUAL(expected, beer::verse(0));
+}
+
+BOOST_AUTO_TEST_CASE(sings_several_verses)
+{
+    string expected = "8 bottles of beer on the wall, 8 bottles of beer.\n"
+        "Take one down and pass it around, 7 bottles of beer on the wall.\n"
+        "\n"
+        "7 bottles of beer on the wall, 7 bottles of beer.\n"
+        "Take one down and pass it around, 6 bottles of beer on the wall.\n"
+        "\n"
+        "6 bottles of beer on the wall, 6 bottles of beer.\n"
+        "Take one down and pass it around, 5 bottles of beer on the wall.\n";
+
+    BOOST_REQUIRE_EQUAL(expected, beer::sing(8, 6));
+}
+
+BOOST_AUTO_TEST_CASE(sings_the_rest_of_the_verses)
+{
+    string expected = "3 bottles of beer on the wall, 3 bottles of beer.\n"
+        "Take one down and pass it around, 2 bottles of beer on the wall.\n"
+        "\n"
+        "2 bottles of beer on the wall, 2 bottles of beer.\n"
+        "Take one down and pass it around, 1 bottle of beer on the wall.\n"
+        "\n"
+        "1 bottle of beer on the wall, 1 bottle of beer.\n"
+        "Take it down and pass it around, no more bottles of beer on the wall.\n"
+        "\n"
+        "No more bottles of beer on the wall, no more bottles of beer.\n"
+        "Go to the store and buy some more, 99 bottles of beer on the wall.\n";
+
+    BOOST_REQUIRE_EQUAL(expected, beer::sing(3));
+}
+#endif