tests

tests/slic3rutils/plugin_test_utils.hpp

@@ -0,0 +1,39 @@
+#pragma once
+
+#include <libslic3r/Utils.hpp>
+
+#include <boost/filesystem.hpp>
+
+#include <string>
+
+namespace Slic3r {
+
+// Point data_dir() at a throwaway directory for the lifetime of a test and
+// restore the previous value afterwards, so code under test writes into a
+// disposable tree and tests don't leak state into each other.
+struct ScopedDataDir
+{
+    std::string               previous;
+    boost::filesystem::path   dir;
+
+    explicit ScopedDataDir(const std::string& tag)
+    {
+        namespace fs = boost::filesystem;
+        previous     = data_dir();
+        dir          = fs::temp_directory_path() / fs::unique_path("orca-" + tag + "-%%%%-%%%%");
+        fs::create_directories(dir);
+        set_data_dir(dir.string());
+    }
+
+    ~ScopedDataDir()
+    {
+        set_data_dir(previous);
+        boost::system::error_code ec;
+        boost::filesystem::remove_all(dir, ec);
+    }
+
+    ScopedDataDir(const ScopedDataDir&)            = delete;
+    ScopedDataDir& operator=(const ScopedDataDir&) = delete;
+};
+
+} // namespace Slic3r