From 75b4d8fef8db7fa21b0a3693feee3a5bcc8a7339 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pawe=C5=82=20Bylica?= <chfast@gmail.com>
Date: Wed, 17 Jun 2020 13:12:26 +0200
Subject: [PATCH] test: Add CMake subproject example and test

---
 examples/use_cmake_subproject/CMakeLists.txt  | 17 +++++++++++
 examples/use_cmake_subproject/intx/.gitignore |  3 ++
 .../use_cmake_subproject/intx/COPY_INTX_HERE  |  0
 examples/use_cmake_subproject/use_int128.cpp  | 10 +++++++
 examples/use_cmake_subproject/use_intx.cpp    | 10 +++++++
 test/integration/CMakeLists.txt               |  3 +-
 .../cmake_subproject/CMakeLists.txt           | 30 +++++++++++++++++++
 7 files changed, 72 insertions(+), 1 deletion(-)
 create mode 100644 examples/use_cmake_subproject/CMakeLists.txt
 create mode 100644 examples/use_cmake_subproject/intx/.gitignore
 create mode 100644 examples/use_cmake_subproject/intx/COPY_INTX_HERE
 create mode 100644 examples/use_cmake_subproject/use_int128.cpp
 create mode 100644 examples/use_cmake_subproject/use_intx.cpp
 create mode 100644 test/integration/cmake_subproject/CMakeLists.txt

diff --git a/examples/use_cmake_subproject/CMakeLists.txt b/examples/use_cmake_subproject/CMakeLists.txt
new file mode 100644
index 00000000..ef6ccd0f
--- /dev/null
+++ b/examples/use_cmake_subproject/CMakeLists.txt
@@ -0,0 +1,17 @@
+# intx: extended precision integer library.
+# Copyright 2019-2020 Pawel Bylica.
+# Licensed under the Apache License, Version 2.0.
+
+# This example shows how to use intx CMake subproject.
+
+cmake_minimum_required(VERSION 3.10)
+
+project(use_intx_cmake_subproject LANGUAGES CXX)
+
+add_subdirectory(intx)
+
+add_executable(use_int128 use_int128.cpp)
+target_link_libraries(use_int128 PRIVATE intx::int128)
+
+add_executable(use_intx use_intx.cpp)
+target_link_libraries(use_intx PRIVATE intx::intx)
diff --git a/examples/use_cmake_subproject/intx/.gitignore b/examples/use_cmake_subproject/intx/.gitignore
new file mode 100644
index 00000000..84aef393
--- /dev/null
+++ b/examples/use_cmake_subproject/intx/.gitignore
@@ -0,0 +1,3 @@
+*
+!/.gitignore
+!/COPY_INTX_HERE
diff --git a/examples/use_cmake_subproject/intx/COPY_INTX_HERE b/examples/use_cmake_subproject/intx/COPY_INTX_HERE
new file mode 100644
index 00000000..e69de29b
diff --git a/examples/use_cmake_subproject/use_int128.cpp b/examples/use_cmake_subproject/use_int128.cpp
new file mode 100644
index 00000000..6789e437
--- /dev/null
+++ b/examples/use_cmake_subproject/use_int128.cpp
@@ -0,0 +1,10 @@
+// intx: extended precision integer library.
+// Copyright 2019-2020 Pawel Bylica.
+// Licensed under the Apache License, Version 2.0.
+
+#include <intx/int128.hpp>
+
+int main(int argc, char**)
+{
+    return static_cast<int>(argc / intx::uint128{1, 0});
+}
diff --git a/examples/use_cmake_subproject/use_intx.cpp b/examples/use_cmake_subproject/use_intx.cpp
new file mode 100644
index 00000000..1b7069b4
--- /dev/null
+++ b/examples/use_cmake_subproject/use_intx.cpp
@@ -0,0 +1,10 @@
+// intx: extended precision integer library.
+// Copyright 2019-2020 Pawel Bylica.
+// Licensed under the Apache License, Version 2.0.
+
+#include <intx/intx.hpp>
+
+int main(int argc, char**)
+{
+    return static_cast<int>(intx::uint512{argc} / (intx::uint512{1} << 111));
+}
diff --git a/test/integration/CMakeLists.txt b/test/integration/CMakeLists.txt
index 2fefc1bd..fcb848bd 100644
--- a/test/integration/CMakeLists.txt
+++ b/test/integration/CMakeLists.txt
@@ -1,5 +1,6 @@
 # intx: extended precision integer library.
-# Copyright 2019 Pawel Bylica.
+# Copyright 2019-2020 Pawel Bylica.
 # Licensed under the Apache License, Version 2.0.
 
 add_subdirectory(cmake_package)
+add_subdirectory(cmake_subproject)
diff --git a/test/integration/cmake_subproject/CMakeLists.txt b/test/integration/cmake_subproject/CMakeLists.txt
new file mode 100644
index 00000000..abcfcb1c
--- /dev/null
+++ b/test/integration/cmake_subproject/CMakeLists.txt
@@ -0,0 +1,30 @@
+# intx: extended precision integer library.
+# Copyright 2020 Pawel Bylica.
+# Licensed under the Apache License, Version 2.0.
+
+# Test suite for using intx as a CMake subproject.
+
+# All files needed to build intx as a CMake subproject:
+file(
+    COPY
+    ${PROJECT_SOURCE_DIR}/CMakeLists.txt
+    ${PROJECT_SOURCE_DIR}/cmake
+    ${PROJECT_SOURCE_DIR}/include
+    DESTINATION ${PROJECT_SOURCE_DIR}/examples/use_cmake_subproject/intx
+)
+
+set(build_dir ${CMAKE_CURRENT_BINARY_DIR}/build)
+file(MAKE_DIRECTORY ${build_dir})
+
+if(CMAKE_BUILD_TYPE)
+    set(build_type_arg -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE})
+endif()
+
+add_test(
+    NAME ${PROJECT_NAME}/cmake_subproject/use_cmake_subproject
+    COMMAND
+    ${CMAKE_COMMAND} -G ${CMAKE_GENERATOR}
+    ${PROJECT_SOURCE_DIR}/examples/use_cmake_subproject
+    ${build_type_arg}
+    WORKING_DIRECTORY ${build_dir}
+)