tests: revice XDG unit tests

2 files changed, 182 insertions, 0 deletions

diff --git a/source/tests/lib/system/CMakeLists.txt b/source/tests/lib/system/CMakeLists.txt
new file mode 100644
index 0000000..ba0ff1a
--- /dev/null
+++ b/source/tests/lib/system/CMakeLists.txt
@@ -0,0 +1,11 @@
+add_executable("wanda-tests-system"
+    "src/xdg.cpp"
+)
+
+target_link_libraries("wanda-tests-system"
+    "wanda::system"
+
+    "Catch2::Catch2WithMain"
+)
+
+catch_discover_tests("wanda-tests-system")
\ No newline at end of file
diff --git a/source/tests/lib/system/src/xdg.cpp b/source/tests/lib/system/src/xdg.cpp
new file mode 100644
index 0000000..5872dc6
--- /dev/null
+++ b/source/tests/lib/system/src/xdg.cpp
@@ -0,0 +1,171 @@
+#include "wanda/system/xdg.hpp"
+
+#include "wanda/system/environment.hpp"
+
+#include <catch2/catch_all.hpp>
+#include <unistd.h>
+
+#include <filesystem>
+#include <string>
+#include <utility>
+
+using namespace std::string_literals;
+
+namespace wanda::system::test
+{
+
+  TEST_CASE("XDG variable names match the specification", "[system][xdg][spec]")
+  {
+    REQUIRE(xdg_variable(xdg_directory::data_home) == "XDG_DATA_HOME");
+    REQUIRE(xdg_variable(xdg_directory::config_home) == "XDG_CONFIG_HOME");
+    REQUIRE(xdg_variable(xdg_directory::cache_home) == "XDG_CACHE_HOME");
+    REQUIRE(xdg_variable(xdg_directory::runtime_dir) == "XDG_RUNTIME_DIR");
+  }
+
+  SCENARIO("The values of the XDG variables depend on the environment", "[system][xdg][spec]")
+  {
+    auto const home_directory = std::filesystem::path{"/home/test"};
+    auto const run_directory = std::filesystem::path{"/run/user"};
+    auto const uid = std::to_string(::getuid());
+
+    GIVEN("An environment that only contains HOME")
+    {
+      auto home = "HOME="s + home_directory.native();
+      char const * env_data[] = {home.c_str(), nullptr};
+      auto env = environment{env_data};
+
+      THEN("the data home is '<home_directory>/.local/share")
+      {
+        REQUIRE(xdg_path_for(xdg_directory::data_home, env) == home_directory / ".local/share");
+      }
+
+      THEN("the config home is '<home_directory>/.config")
+      {
+        REQUIRE(xdg_path_for(xdg_directory::config_home, env) == home_directory / ".config");
+      }
+
+      THEN("the cache home is '<home_directory>/.cache")
+      {
+        REQUIRE(xdg_path_for(xdg_directory::cache_home, env) == home_directory / ".cache");
+      }
+
+      THEN("the runtime directory is '<run_directory>/<uid>'")
+      {
+        REQUIRE(xdg_path_for(xdg_directory::runtime_dir, env) == run_directory / uid);
+      }
+    }
+
+    GIVEN("An environment that only contains HOME and XDG_DATA_HOME")
+    {
+      auto home = "HOME="s + home_directory.native();
+      auto data_home = "XDG_DATA_HOME=/home/test/xdg_data_home"s;
+      char const * env_data[] = {home.c_str(), data_home.c_str(), nullptr};
+      auto env = environment{env_data};
+
+      THEN("the data home is '$XDG_DATA_HOME")
+      {
+        REQUIRE(xdg_path_for(xdg_directory::data_home, env) == env["XDG_DATA_HOME"]);
+      }
+
+      THEN("the config home is '<home_directory>/.config")
+      {
+        REQUIRE(xdg_path_for(xdg_directory::config_home, env) == home_directory / ".config");
+      }
+
+      THEN("the cache home is '<home_directory>/.cache")
+      {
+        REQUIRE(xdg_path_for(xdg_directory::cache_home, env) == home_directory / ".cache");
+      }
+
+      THEN("the runtime directory is '<run_directory>/<uid>'")
+      {
+        REQUIRE(xdg_path_for(xdg_directory::runtime_dir, env) == run_directory / uid);
+      }
+    }
+
+    GIVEN("An environment that only contains HOME and XDG_CONFIG_HOME")
+    {
+      auto home = "HOME="s + home_directory.native();
+      auto config_home = "XDG_CONFIG_HOME=/home/test/xdg_config_home"s;
+      char const * env_data[] = {home.c_str(), config_home.c_str(), nullptr};
+      auto env = environment{env_data};
+
+      THEN("the data home is '<home_directory>/.local/share")
+      {
+        REQUIRE(xdg_path_for(xdg_directory::data_home, env) == home_directory / ".local/share");
+      }
+
+      THEN("the config home is '$XDG_CONFIG_HOME")
+      {
+        REQUIRE(xdg_path_for(xdg_directory::config_home, env) == env["XDG_CONFIG_HOME"]);
+      }
+
+      THEN("the cache home is '<home_directory>/.cache")
+      {
+        REQUIRE(xdg_path_for(xdg_directory::cache_home, env) == home_directory / ".cache");
+      }
+
+      THEN("the runtime directory is '<run_directory>/<uid>'")
+      {
+        REQUIRE(xdg_path_for(xdg_directory::runtime_dir, env) == run_directory / uid);
+      }
+    }
+
+    GIVEN("An environment that only contains HOME and XDG_CACHE_HOME")
+    {
+      auto home = "HOME="s + home_directory.native();
+      auto cache_home = "XDG_CACHE_HOME=/home/test/xdg_cache_home"s;
+      char const * env_data[] = {home.c_str(), cache_home.c_str(), nullptr};
+      auto env = environment{env_data};
+
+      THEN("the data home is '<home_directory>/.local/share")
+      {
+        REQUIRE(xdg_path_for(xdg_directory::data_home, env) == home_directory / ".local/share");
+      }
+
+      THEN("the cache home is '<home_directory>/.config")
+      {
+        REQUIRE(xdg_path_for(xdg_directory::config_home, env) == home_directory / ".config");
+      }
+
+      THEN("the config home is '$XDG_CACHE_HOME")
+      {
+        REQUIRE(xdg_path_for(xdg_directory::cache_home, env) == env["XDG_CACHE_HOME"]);
+      }
+
+      THEN("the runtime directory is '<run_directory>/<uid>'")
+      {
+        REQUIRE(xdg_path_for(xdg_directory::runtime_dir, env) == run_directory / uid);
+      }
+    }
+
+    GIVEN("An environment that only contains HOME and XDG_RUNTIME_DIR")
+    {
+      auto home = "HOME="s + home_directory.native();
+      auto runtime_dir = "XDG_RUNTIME_DIR=/home/test/xdg_runtime_dir"s;
+      char const * env_data[] = {home.c_str(), runtime_dir.c_str(), nullptr};
+      auto env = environment{env_data};
+
+      THEN("the data home is '<home_directory>/.local/share")
+      {
+        REQUIRE(xdg_path_for(xdg_directory::data_home, env) == home_directory / ".local/share");
+      }
+
+      THEN("the config home is '<home_directory>/.config")
+      {
+        REQUIRE(xdg_path_for(xdg_directory::config_home, env) == home_directory / ".config");
+      }
+
+      THEN("the cache home is '<home_directory>/.cache")
+      {
+        REQUIRE(xdg_path_for(xdg_directory::cache_home, env) == home_directory / ".cache");
+      }
+
+      THEN("the runtime directory is '$XDG_RUNTIME_DIR'")
+      {
+        REQUIRE(xdg_path_for(xdg_directory::runtime_dir, env) == env["XDG_RUNTIME_DIR"]);
+      }
+    }
+  }
+
+}  // namespace wanda::system::test
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