Add first test.

CMakeLists.txt

@@ -46,8 +46,8 @@ if(WITH_GUI)
   add_subdirectory(gui)
 endif()
 
-# if(WITH_TESTS)
-#   add_subdirectory(tests)
-# endif()
+if(WITH_TESTS)
+  add_subdirectory(tests)
+endif()
 
 include(cmake/packages.cmake)

README.adoc

@@ -108,7 +108,7 @@ cmake --build . -- -j$(nproc --ignore=1)
 
 .CMake options:
 * `-DCMAKE_BUILD_TYPE=Debug` for a debug build.
-// * `-DWITH_TESTS=YES` if you want to compile the tests.
+* `-DWITH_TESTS=YES` if you want to compile the tests.
 * `-DWITH_GUI=NO` to only compile and install the library.
 * `-DWITH_CLANG-TIDY=YES` to check the sourcecode with
   link:{uri-clang-tidy}[clang-tidy] while compiling.

tests/CMakeLists.txt

@@ -0,0 +1,29 @@
+include(CTest)
+
+file(GLOB sources_tests test_*.cpp)
+
+find_package(Catch2 CONFIG)
+find_package(Filesystem REQUIRED)
+
+if(Catch2_FOUND)                # Catch 2.x
+  include(Catch)
+  add_executable(all_tests main.cpp ${sources_tests})
+  target_link_libraries(all_tests
+    PRIVATE Catch2::Catch2 std::filesystem ${PROJECT_NAME})
+  target_include_directories(all_tests PRIVATE "/usr/include/catch2")
+  catch_discover_tests(all_tests EXTRA_ARGS "${EXTRA_TEST_ARGS}")
+else()                          # Catch 1.x
+  if(EXISTS "/usr/include/catch.hpp")
+    message(STATUS "Catch 1.x found.")
+    foreach(src ${sources_tests})
+      get_filename_component(bin ${src} NAME_WE)
+      add_executable(${bin} main.cpp ${src})
+      target_link_libraries(${bin}
+        PRIVATE std::filesystem ${PROJECT_NAME})
+      add_test(${bin} ${bin} "${EXTRA_TEST_ARGS}")
+    endforeach()
+  else()
+    message(FATAL_ERROR
+      "Neither Catch 2.x nor Catch 1.x could be found.")
+  endif()
+endif()

tests/environment_variables.hpp

@@ -0,0 +1,27 @@
+/*  This file is part of FediPotato.
+ *  Copyright © 2020 tastytea <tastytea@tastytea.de>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ *  SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ *  OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ *  CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef FEDIPOTATO_TESTS_ENVIRONMENT_VARIABLES_HPP
+#define FEDIPOTATO_TESTS_ENVIRONMENT_VARIABLES_HPP
+
+namespace FediPotato
+{
+
+//! Set XDG_CONFIG_HOME to a temporary directory.
+void set_environment_variables();
+
+} // namespace FediPotato
+
+#endif  // FEDIPOTATO_TESTS_ENVIRONMENT_VARIABLES_HPP

tests/main.cpp

@@ -0,0 +1,39 @@
+/*  This file is part of FediPotato.
+ *  Copyright © 2020 tastytea <tastytea@tastytea.de>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ *  SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ *  OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ *  CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#define CATCH_CONFIG_MAIN
+
+#include "environment_variables.hpp"
+
+#include <catch.hpp>
+
+#include <cstdlib>
+#if __has_include(<filesystem>)
+#    include <filesystem>
+#else
+#    include <experimental/filesystem>
+#endif
+
+namespace FediPotato
+{
+
+namespace fs = std::filesystem;
+
+void set_environment_variables()
+{
+    setenv("XDG_CONFIG_HOME", fs::temp_directory_path().c_str(), 1);
+}
+
+} // namespace FediPotato

tests/test_load_library.cpp

@@ -0,0 +1,49 @@
+/*  This file is part of FediPotato.
+ *  Copyright © 2020 tastytea <tastytea@tastytea.de>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ *  SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ *  OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ *  CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "environment_variables.hpp"
+#include "fedipotato.hpp"
+
+#include <catch.hpp>
+
+#include <exception>
+
+namespace FediPotato
+{
+
+SCENARIO ("Load FediPotato.")
+{
+    set_environment_variables();
+    bool exception{false};
+
+    WHEN ("Instance of FediPotato is constructed.")
+    {
+        try
+        {
+            FediPotato potato("FediPotato");
+        }
+        catch (const std::exception &e)
+        {
+            exception = true;
+        }
+
+        THEN ("No exception is thrown.")
+        {
+            REQUIRE_FALSE(exception);
+        }
+    }
+}
+
+} // namespace FediPotato