test - introduce unit tests for telemetry::File

src/telemetry/file.cpp

@@ -68,3 +68,7 @@ void File::disable()
 }
 
 } // namespace telemetry
+
+#ifdef TELEMETRY_ENABLE_TESTS
+#include "tests/testFile.cpp"
+#endif

src/telemetry/tests/testFile.cpp

@@ -0,0 +1,111 @@
+/**
+ * @file
+ * @author Lukas Hutak <hutak@cesnet.cz>
+ * @brief Unit tests of telemetry::File 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(TelemetryFile, hasRead)
+{
+	auto root = Directory::create();
+
+	auto noOpsFile = root->addFile("no", {});
+	EXPECT_FALSE(noOpsFile->hasRead());
+
+	FileOps ops {};
+	ops.read = []() { return Scalar {}; };
+	auto opsFile = root->addFile("yes", ops);
+	EXPECT_TRUE(opsFile->hasRead());
+}
+
+/**
+ * @test Test checking availability of clear operation.
+ */
+TEST(TelemetryFile, hasClear)
+{
+	auto root = Directory::create();
+
+	auto noOpsFile = root->addFile("no", {});
+	EXPECT_FALSE(noOpsFile->hasClear());
+
+	FileOps ops {};
+	ops.clear = []() {};
+	auto opsFile = root->addFile("yes", ops);
+	EXPECT_TRUE(opsFile->hasClear());
+}
+
+/**
+ * @test Test executing read operation.
+ */
+TEST(TelemetryFile, read)
+{
+	auto root = Directory::create();
+
+	auto noOpsFile = root->addFile("no", {});
+	EXPECT_THROW(noOpsFile->read(), NodeException);
+
+	FileOps ops {};
+	ops.read = []() { return Scalar {"hello"}; };
+	auto opsFile = root->addFile("yes", ops);
+	EXPECT_EQ(Content {Scalar {"hello"}}, opsFile->read());
+}
+
+/**
+ * @test Test executing read operation.
+ */
+TEST(TelemetryFile, clear)
+{
+	auto root = Directory::create();
+	int valueToClear = 1;
+
+	auto noOpsFile = root->addFile("no", {});
+	EXPECT_THROW(noOpsFile->clear(), NodeException);
+
+	FileOps ops {};
+	ops.clear = [&]() { valueToClear = 0; };
+	auto opsFile = root->addFile("yes", ops);
+	opsFile->clear();
+	EXPECT_EQ(0, valueToClear);
+}
+
+/**
+ * @test Test that disabling of all operations works as expected.
+ */
+TEST(TelemetryFile, disable)
+{
+	int64_t counter = 0;
+	FileOps ops {};
+	ops.read = [&]() { return Scalar {counter++}; };
+	ops.clear = [&]() { counter = 0; };
+
+	auto root = Directory::create();
+	auto file = root->addFile("file", ops);
+
+	EXPECT_TRUE(file->hasRead());
+	EXPECT_TRUE(file->hasClear());
+
+	EXPECT_EQ(Content {Scalar {int64_t {0}}}, file->read());
+	EXPECT_EQ(Content {Scalar {int64_t {1}}}, file->read());
+	EXPECT_EQ(Content {Scalar {int64_t {2}}}, file->read());
+	EXPECT_NO_THROW(file->clear());
+	EXPECT_EQ(Content {Scalar {int64_t {0}}}, file->read());
+
+	file->disable();
+
+	EXPECT_FALSE(file->hasRead());
+	EXPECT_FALSE(file->hasClear());
+	EXPECT_THROW(file->read(), NodeException);
+	EXPECT_THROW(file->clear(), NodeException);
+}
+
+} // namespace telemetry