test: add unit test for case-sensitive option key preservation

lance-spark-base_2.12/src/test/java/org/lance/spark/BaseLanceNamespaceSparkCatalogInitializeTest.java

@@ -0,0 +1,96 @@
+/*
+ * 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.
+ */
+package org.lance.spark;
+
+import org.lance.memwal.ShardingSpec;
+import org.lance.spark.write.StagedCommit;
+
+import org.apache.spark.sql.types.StructType;
+import org.apache.spark.sql.util.CaseInsensitiveStringMap;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+import java.nio.file.Path;
+import java.util.HashMap;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class BaseLanceNamespaceSparkCatalogInitializeTest {
+
+  @TempDir private Path tempDir;
+
+  @Test
+  public void testInitializePreservesCaseSensitiveOptionKeys() {
+    Map<String, String> rawOptions = new HashMap<>();
+    rawOptions.put("impl", "dir");
+    rawOptions.put("root", tempDir.toString());
+    rawOptions.put("MyMixedCaseKey", "value1");
+    rawOptions.put("ALLCAPS_KEY", "value2");
+    rawOptions.put("camelCaseOption", "value3");
+
+    CaseInsensitiveStringMap options = new CaseInsensitiveStringMap(rawOptions);
+
+    TestCatalog catalog = new TestCatalog();
+    catalog.initialize("test", options);
+
+    Map<String, String> properties = catalog.getNamespaceProperties();
+
+    assertTrue(
+        properties.containsKey("MyMixedCaseKey"),
+        "Should preserve mixed-case key 'MyMixedCaseKey', got keys: " + properties.keySet());
+    assertTrue(
+        properties.containsKey("ALLCAPS_KEY"),
+        "Should preserve all-caps key 'ALLCAPS_KEY', got keys: " + properties.keySet());
+    assertTrue(
+        properties.containsKey("camelCaseOption"),
+        "Should preserve camelCase key 'camelCaseOption', got keys: " + properties.keySet());
+
+    assertEquals("value1", properties.get("MyMixedCaseKey"));
+    assertEquals("value2", properties.get("ALLCAPS_KEY"));
+    assertEquals("value3", properties.get("camelCaseOption"));
+  }
+
+  private static class TestCatalog extends BaseLanceNamespaceSparkCatalog {
+    @Override
+    public LanceDataset createDataset(
+        LanceSparkReadOptions readOptions,
+        StructType sparkSchema,
+        Map<String, String> initialStorageOptions,
+        String namespaceImpl,
+        Map<String, String> namespaceProperties,
+        boolean managedVersioning,
+        String fileFormatVersion,
+        Map<String, String> tableProperties,
+        ShardingSpec shardingSpec) {
+      return null;
+    }
+
+    @Override
+    public LanceDataset createStagedDataset(
+        LanceSparkReadOptions readOptions,
+        StructType sparkSchema,
+        Map<String, String> initialStorageOptions,
+        String namespaceImpl,
+        Map<String, String> namespaceProperties,
+        boolean managedVersioning,
+        StagedCommit stagedCommit,
+        String fileFormatVersion,
+        Map<String, String> tableProperties,
+        ShardingSpec shardingSpec) {
+      return null;
+    }
+  }
+}