test - introduce unit tests for telemetry::Holder

src/telemetry/holder.cpp

@@ -34,3 +34,7 @@ void Holder::disableFiles()
 }
 
 } // namespace telemetry
+
+#ifdef TELEMETRY_ENABLE_TESTS
+#include "tests/testHolder.cpp"
+#endif

src/telemetry/tests/testHolder.cpp

@@ -0,0 +1,76 @@
+/**
+ * @file
+ * @author Lukas Hutak <hutak@cesnet.cz>
+ * @brief Unit tests of telemetry::Holder class
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <telemetry/directory.hpp>
+
+#include <gtest/gtest.h>
+
+namespace telemetry {
+
+/**
+ * @test Test checking availability of read operation.
+ */
+TEST(TelemetryHolder, create)
+{
+	Holder holder;
+}
+
+/**
+ * @test Test adding various entries to the holder.
+ */
+TEST(TelemetryHolder, add)
+{
+	auto root = Directory::create();
+
+	{
+		Holder holder;
+
+		{
+			auto file = root->addFile("file", {});
+			auto dir = root->addDir("dir");
+
+			holder.add(file);
+			holder.add(dir);
+		}
+
+		// Check if entries still exists
+		EXPECT_NE(nullptr, root->getEntry("file"));
+		EXPECT_NE(nullptr, root->getEntry("dir"));
+	}
+
+	// After holder destruction, entries should be gone...
+	EXPECT_EQ(nullptr, root->getEntry("file"));
+	EXPECT_EQ(nullptr, root->getEntry("dir"));
+}
+
+/**
+ * @test Test disabling callbacks of held files.
+ */
+TEST(TelemetryHolder, disableFiles)
+{
+	auto root = Directory::create();
+	FileOps ops = {};
+	ops.read = []() { return Scalar {"value"}; };
+	ops.clear = []() {};
+
+	Holder holder;
+
+	auto dir = root->addDir("dir");
+	auto file = root->addFile("file", ops);
+	holder.add(file);
+
+	EXPECT_TRUE(file->hasRead());
+	EXPECT_TRUE(file->hasClear());
+
+	holder.disableFiles();
+
+	EXPECT_FALSE(file->hasRead());
+	EXPECT_FALSE(file->hasClear());
+}
+
+} // namespace telemetry