#56 initial tests for configuration manager

src/main/java/alfio/manager/system/ConfigurationManager.java

@@ -77,6 +77,7 @@ private Configuration selectPath(List<Configuration> conf) {
     }
 
     //meh
+    @SuppressWarnings("unchecked")
     private static <T> T from(ConfigurationPath c) {
         return (T) c;
     }

src/test/java/alfio/manager/ConfigurationManagerTest.java

@@ -0,0 +1,77 @@
+/**
+ * This file is part of alf.io.
+ *
+ * alf.io is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * alf.io 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with alf.io.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package alfio.manager;
+
+import alfio.config.DataSourceConfiguration;
+import alfio.config.Initializer;
+import alfio.manager.system.ConfigurationManager;
+import alfio.model.system.Configuration;
+import alfio.model.system.ConfigurationKeys;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.Optional;
+
+import static org.junit.Assert.assertEquals;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = {DataSourceConfiguration.class})
+@ActiveProfiles(Initializer.PROFILE_DEV)
+@Transactional
+public class ConfigurationManagerTest {
+
+    @BeforeClass
+    public static void initEnv() {
+        System.setProperty("datasource.dialect", "HSQLDB");
+        System.setProperty("datasource.driver", "org.hsqldb.jdbcDriver");
+        System.setProperty("datasource.url", "jdbc:hsqldb:mem:alfio");
+        System.setProperty("datasource.username", "sa");
+        System.setProperty("datasource.password", "");
+        System.setProperty("datasource.validationQuery", "SELECT 1 FROM INFORMATION_SCHEMA.SYSTEM_USERS");
+        //System.setProperty("spring.profiles.active", Initializer.PROFILE_DEV);
+    }
+
+    @Autowired
+    private ConfigurationManager configurationManager;
+
+    @Autowired
+    private NamedParameterJdbcTemplate jdbcTemplate;
+
+    @Test
+    public void testPresentStringConfigValue() {
+        assertEquals(Optional.of("5"), configurationManager.getStringConfigValue(Configuration.system(), ConfigurationKeys.MAX_AMOUNT_OF_TICKETS_BY_RESERVATION));
+    }
+
+    @Test
+    public void testEmptyStringConfigValue() {
+        assertEquals(Optional.empty(), configurationManager.getStringConfigValue(Configuration.system(), ConfigurationKeys.SMTP_PASSWORD));
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void testMissingConfigValue() {
+        configurationManager.getRequiredValue(Configuration.system(), ConfigurationKeys.SMTP_PASSWORD);
+    }
+
+}