cmake: add import config tests

test/CMakeLists.txt

@@ -133,3 +133,10 @@ foreach(file ${files})
     endif()
 
 endforeach()
+
+#############################################################################
+# Test the generated build configs
+#############################################################################
+add_subdirectory(cmake_import)
+add_subdirectory(cmake_import_minver)
+add_subdirectory(cmake_add_subdirectory)

test/cmake_add_subdirectory/CMakeLists.txt

+add_test(NAME cmake_add_subdirectory_configure
+  COMMAND ${CMAKE_COMMAND}
+    -G "${CMAKE_GENERATOR}"
+    -Dnlohmann_json_source=${PROJECT_SOURCE_DIR}
+    ${CMAKE_CURRENT_SOURCE_DIR}/project
+)
+add_test(NAME cmake_add_subdirectory_build
+  COMMAND ${CMAKE_COMMAND} --build .
+)
+set_tests_properties(cmake_add_subdirectory_configure PROPERTIES
+  FIXTURES_SETUP cmake_add_subdirectory
+)
+set_tests_properties(cmake_add_subdirectory_build PROPERTIES
+  FIXTURES_REQUIRED cmake_add_subdirectory
+)

test/cmake_add_subdirectory/project/CMakeLists.txt

+cmake_minimum_required(VERSION 3.8)
+
+project(DummyImport CXX)
+
+set(JSON_BuildTests OFF CACHE INTERNAL "")
+add_subdirectory(${nlohmann_json_source}
+   ${CMAKE_CURRENT_BINARY_DIR}/nlohmann_json)
+
+add_executable(with_namespace_target main.cpp)
+target_link_libraries(with_namespace_target nlohmann_json::nlohmann_json)
+
+add_executable(without_namespace_target main.cpp)
+target_link_libraries(without_namespace_target nlohmann_json)

test/cmake_add_subdirectory/project/main.cpp

+#include <nlohmann/json.hpp>
+
+int main(int argc, char **argv)
+{
+    nlohmann::json j;
+
+    return 0;
+}

test/cmake_import/CMakeLists.txt

+add_test(NAME cmake_import_configure
+  COMMAND ${CMAKE_COMMAND}
+    -G "${CMAKE_GENERATOR}"
+    -Dnlohmann_json_DIR=${PROJECT_BINARY_DIR}
+    ${CMAKE_CURRENT_SOURCE_DIR}/project
+)
+add_test(NAME cmake_import_build
+  COMMAND ${CMAKE_COMMAND} --build .
+)
+set_tests_properties(cmake_import_configure PROPERTIES
+  FIXTURES_SETUP cmake_import
+)
+set_tests_properties(cmake_import_build PROPERTIES
+  FIXTURES_REQUIRED cmake_import
+)

test/cmake_import/project/CMakeLists.txt

+cmake_minimum_required(VERSION 3.8)
+
+project(DummyImport CXX)
+
+find_package(nlohmann_json REQUIRED)
+
+add_executable(with_namespace_target main.cpp)
+target_link_libraries(with_namespace_target nlohmann_json::nlohmann_json)
+
+add_executable(without_namespace_target main.cpp)
+target_link_libraries(without_namespace_target nlohmann_json)
+

test/cmake_import/project/main.cpp

+#include <nlohmann/json.hpp>
+
+int main(int argc, char **argv)
+{
+    nlohmann::json j;
+
+    return 0;
+}

test/cmake_import_minver/CMakeLists.txt

+add_test(NAME cmake_import_minver_configure
+  COMMAND ${CMAKE_COMMAND}
+    -G "${CMAKE_GENERATOR}"
+    -Dnlohmann_json_DIR=${PROJECT_BINARY_DIR}
+    ${CMAKE_CURRENT_SOURCE_DIR}/project
+)
+add_test(NAME cmake_import_minver_build
+  COMMAND ${CMAKE_COMMAND} --build .
+)
+set_tests_properties(cmake_import_minver_configure PROPERTIES
+  FIXTURES_SETUP cmake_import_minver
+)
+set_tests_properties(cmake_import_minver_build PROPERTIES
+  FIXTURES_REQUIRED cmake_import_minver
+)

test/cmake_import_minver/project/CMakeLists.txt

+cmake_minimum_required(VERSION 3.8)
+
+project(DummyImportMinVer CXX)
+
+find_package(nlohmann_json 3.2.0 REQUIRED)
+
+add_executable(with_namespace_target main.cpp)
+target_link_libraries(with_namespace_target nlohmann_json::nlohmann_json)

test/cmake_import_minver/project/main.cpp

+#include <nlohmann/json.hpp>
+
+int main(int argc, char **argv)
+{
+    nlohmann::json j;
+
+    return 0;
+}