Add tests.

.gitmodules

+[submodule "gtest"]
+	path = gtest
+	url = git@github.com:vitaut/gtest.git

CMakeLists.txt

 cmake_minimum_required(VERSION 2.6)
 project(FORMAT)
+
 add_library(format format.cc)
+
+if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/gtest/CMakeLists.txt)
+  add_subdirectory(gtest)
+  include_directories(gtest/include)
+  link_directories(${CMAKE_CURRENT_BINARY_DIR}/gtest)
+  enable_testing()
+  add_executable(format_test format_test.cc gtest/src/gtest_main.cc)
+  target_link_libraries(format_test format gtest)
+  add_test(format_test format_test)
+endif ()

format_test.cc

+/*
+ Formatting library tests.
+ Author: Victor Zverovich
+ */
+
+#include <cfloat>
+#include <climits>
+#include <cstring>
+#include <gtest/gtest.h>
+#include "format.h"
+
+using std::size_t;
+using std::sprintf;
+
+using fmt::Formatter;
+using fmt::Format;
+
+TEST(FormatterTest, FormatNoArgs) {
+  Formatter format;
+  format("test");
+  EXPECT_STREQ("test", format.c_str());
+}
+
+TEST(FormatterTest, FormatComplex) {
+  EXPECT_STREQ("1.2340000000:0042:+3.13:str:0x3e8:X:%",
+      c_str(Format("{0:0.10f}:{1:04}:{2:+g}:{3}:{4}:{5}:%")
+          << 1.234 << 42 << 3.13 << "str" << reinterpret_cast<void*>(1000)
+          << 'X'));
+  printf("%0.*f:%04d:%+g:%s:%p:%c:%%\n",
+                  10, 1.234, 42, 3.13, "str", (void*)1000, (int)'X');
+  printf("%0.10f:%04d:%+g:%s:%p:%c:%%\n",
+                  1.234, 42, 3.13, "str", (void*)1000, (int)'X');
+}
+
+TEST(FormatterTest, FormatInt) {
+  EXPECT_STREQ("42", c_str(Format("{0}") << 42));
+  EXPECT_STREQ("before 42 after", c_str(Format("before {0} after") << 42));
+  printf("%0.10f:%04d:%+g:%s:%p:%c:%%\n",
+                  1.234, 42, 3.13, "str", (void*)1000, (int)'X');
+}
+
+// TODO

gtest @ 2084bf04

+Subproject commit 2084bf04aa7b22808bf449cf72dedf7774776feb