test(tests/config): config tests added

tests/config/configTest.cpp

@@ -0,0 +1,60 @@
+#include <gtest/gtest.h>
+#include "config.h"
+#include <iostream>
+#include <string>
+#include <vector>
+#include <set>
+#include <sstream>
+
+std::string EXAMPLE_FILENAME = std::string(getenv("MESON_SOURCE_ROOT")) + "/tests/config/example.yaml";
+/**
+ * @file configTest.cpp
+ * @brief Unit tests for the Config class.
+ */
+
+/**
+ * @brief Test suite for the Config class.
+ */
+class configTest : public ::testing::Test {};
+
+/**
+ * @brief Test the constructor of the Config class.
+ */
+TEST_F(configTest, constructor) {
+    EXPECT_NO_THROW(Config::getInstance());
+}
+
+TEST_F(configTest, loadConfig) {
+    Config& config = Config::getInstance();
+    EXPECT_TRUE(config.loadConfig(EXAMPLE_FILENAME));
+}
+
+TEST_F(configTest, singletonTest) {
+    Config& config1 = Config::getInstance();
+    Config& config2 = Config::getInstance();
+    EXPECT_EQ(&config1, &config2);
+}
+
+TEST_F(configTest, getTest) {
+    Config& config = Config::getInstance();
+    config.loadConfig(EXAMPLE_FILENAME);
+    int maxIter = config.get<int>("opac:lowTemp:numeric:maxIter", 10);
+    EXPECT_EQ(maxIter, 100);
+    EXPECT_NE(maxIter, 10);
+
+    std::string logLevel = config.get<std::string>("logLevel", "DEBUG");
+    EXPECT_EQ(logLevel, "INFO");
+    EXPECT_NE(logLevel, "DEBUG");
+
+    float polytropicIndex = config.get<float>("poly:physics:index", 2);
+    EXPECT_EQ(polytropicIndex, 1.5);
+    EXPECT_NE(polytropicIndex, 2);
+
+    float polytropicIndex2 = config.get<float>("poly:physics:index2", 2.0);
+    EXPECT_EQ(polytropicIndex2, 2.0);
+}
+
+TEST_F(configTest, secondSingleton) {
+    Config& config = Config::getInstance();
+    EXPECT_EQ(config.get<int>("opac:lowTemp:numeric:maxIter", 10), 100);
+}