Add unit tests for PluginSettings class

plugins/command-manager/src/test/java/com/wazuh/commandmanager/settings/PluginSettingsTests.java

@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2024, Wazuh Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.wazuh.commandmanager.settings;
+
+import org.opensearch.common.settings.Settings;
+import org.opensearch.env.Environment;
+import org.opensearch.test.OpenSearchIntegTestCase;
+import org.junit.Before;
+
+import java.util.Optional;
+
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+
+import static org.mockito.Mockito.*;
+
+@OpenSearchIntegTestCase.ClusterScope(scope = OpenSearchIntegTestCase.Scope.SUITE)
+public class PluginSettingsTests extends OpenSearchIntegTestCase {
+    @Mock private Environment mockEnvironment;
+
+    @InjectMocks private PluginSettings pluginSettings;
+
+    Settings settings;
+
+    @Before
+    @Override
+    public void setUp() throws Exception {
+        settings =
+                Settings.builder()
+                        .put("command_manager.timeout", 20)
+                        .put("command_manager.job.schedule", 1)
+                        .put("command_manager.job.page_size", 100)
+                        .put("command_manager.job.pit_keep_alive", 30)
+                        .put(
+                                "command_manager.job.index.template",
+                                "index-template-scheduled-commands")
+                        .put("command_manager.api.prefix", "/_command_manager")
+                        .put("command_manager.api.endpoint", "/commands")
+                        .put("command_manager.index.name", "command_manager")
+                        .put("command_manager.index.template", "command_manager_template")
+                        .build();
+
+        mockEnvironment = mock(Environment.class);
+        when(mockEnvironment.settings()).thenReturn(settings);
+        pluginSettings = PluginSettings.getInstance(mockEnvironment.settings());
+        super.setUp();
+    }
+
+    public void testInitializeWithValidValues() throws Exception {
+        pluginSettings = PluginSettings.getInstance(mockEnvironment.settings());
+
+        assertEquals(Optional.of(20), Optional.of(pluginSettings.getTimeout()));
+        assertEquals(Optional.of(1), Optional.of(pluginSettings.getJobSchedule()));
+        assertEquals(Optional.of(100), Optional.of(pluginSettings.getJobPageSize()));
+        assertEquals(Optional.of(30), Optional.of(pluginSettings.getJobKeepAlive()));
+        assertEquals("index-template-scheduled-commands", pluginSettings.getJobIndexTemplate());
+        assertEquals("/_command_manager", pluginSettings.getApiPrefix());
+        assertEquals("/commands", pluginSettings.getApiEndpoint());
+        assertEquals("command_manager", pluginSettings.getIndexName());
+        assertEquals("command_manager_template", pluginSettings.getIndexTemplate());
+    }
+
+    public void testSingletonBehavior() throws Exception {
+        PluginSettings pluginSettings2 = PluginSettings.getInstance(mockEnvironment.settings());
+        assertEquals(pluginSettings, pluginSettings2);
+    }
+
+    public void testSIngletonMultithreadedBehavior() throws Exception {
+        PluginSettings[] pluginSettingsArray = new PluginSettings[10];
+        for (int i = 0; i < 10; i++) {
+            pluginSettingsArray[i] = PluginSettings.getInstance(mockEnvironment.settings());
+        }
+
+        for (int i = 0; i < 10; i++) {
+            assertEquals(pluginSettings, pluginSettingsArray[i]);
+        }
+    }
+}