diff --git a/CMakeLists.txt b/CMakeLists.txt
index 19b8d51..d9bf33c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,3 +13,12 @@ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra")
 add_compile_options(-fPIC)
 
 add_subdirectory(src)
+
+################################################
+
+enable_testing()
+add_subdirectory(third_party/googletest EXCLUDE_FROM_ALL)
+include_directories(third_party/googletest/googletest/include)
+add_subdirectory(test)
+
+################################################
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
new file mode 100644
index 0000000..3df7977
--- /dev/null
+++ b/test/CMakeLists.txt
@@ -0,0 +1,6 @@
+cmake_minimum_required(VERSION 3.0)
+
+include_directories(../src/klotski/all_cases)
+add_executable(test_all_cases all_cases.cc)
+target_link_libraries(test_all_cases all_cases gtest gtest_main)
+add_test(NAME all_cases COMMAND test_all_cases)
diff --git a/test/all_cases.cc b/test/all_cases.cc
new file mode 100644
index 0000000..71d4b0e
--- /dev/null
+++ b/test/all_cases.cc
@@ -0,0 +1,10 @@
+#include <cstdint>
+#include "all_cases.h"
+#include "gtest/gtest.h"
+
+const uint32_t BASIC_RANGES_SIZE = 7311921;
+
+TEST(AllCases, basic_ranges_size) {
+    auto &basic_ranges = BasicRanges::fetch();
+    EXPECT_EQ(basic_ranges.size(), BASIC_RANGES_SIZE);
+}