Add unit tests in Synapse Connector.

Author: Jithendar12

athena-synapse/src/test/java/com/amazonaws/athena/connectors/synapse/SynapseEnvironmentPropertiesTest.java

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+/*-
+ * #%L
+ * athena-synapse
+ * %%
+ * Copyright (C) 2019 - 2025 Amazon Web Services
+ * %%
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * #L%
+ */
+package com.amazonaws.athena.connectors.synapse;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import static com.amazonaws.athena.connector.lambda.connection.EnvironmentConstants.DATABASE;
+import static com.amazonaws.athena.connector.lambda.connection.EnvironmentConstants.DEFAULT;
+import static com.amazonaws.athena.connector.lambda.connection.EnvironmentConstants.HOST;
+import static com.amazonaws.athena.connector.lambda.connection.EnvironmentConstants.PORT;
+import static com.amazonaws.athena.connector.lambda.connection.EnvironmentConstants.SECRET_NAME;
+import static org.junit.Assert.assertEquals;
+
+public class SynapseEnvironmentPropertiesTest
+{
+    private Map<String, String> connectionProperties;
+    private SynapseEnvironmentProperties synapseEnvironmentProperties;
+
+    @Before
+    public void setUp()
+    {
+        connectionProperties = new HashMap<>();
+        connectionProperties.put(HOST, "test.sql.azuresynapse.net");
+        connectionProperties.put(PORT, "1433");
+        connectionProperties.put(DATABASE, "testdb");
+        connectionProperties.put(SECRET_NAME, "synapse-secret");
+
+        synapseEnvironmentProperties = new SynapseEnvironmentProperties();
+    }
+
+    @Test
+    public void connectionPropertiesToEnvironment_WithValidProperties_ReturnsCorrectConnectionString()
+    {
+        Map<String, String> synapseConnectionProperties = synapseEnvironmentProperties.connectionPropertiesToEnvironment(connectionProperties);
+
+        String expectedConnectionString = "synapse://jdbc:sqlserver://test.sql.azuresynapse.net:1433;databaseName=testdb;${synapse-secret}";
+        assertEquals(expectedConnectionString, synapseConnectionProperties.get(DEFAULT));
+    }
+}