Last UT to complete coverage

Signed-off-by: Alfredo Gutierrez <[email protected]>

server/src/test/java/com/hedera/block/server/persistence/PersistenceInjectionModuleTest.java

@@ -17,6 +17,8 @@
 package com.hedera.block.server.persistence;
 
 import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
 
 import com.hedera.block.server.config.BlockNodeContext;
 import com.hedera.block.server.persistence.storage.PersistenceStorageConfig;
@@ -25,6 +27,7 @@
 import com.hedera.block.server.util.TestConfigUtil;
 import com.hedera.hapi.block.stream.Block;
 import com.hedera.hapi.block.stream.BlockItem;
+import com.swirlds.config.api.Configuration;
 import java.io.IOException;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -56,6 +59,26 @@ void testProvidesBlockWriter() {
         assertNotNull(blockWriter);
     }
 
+    @Test
+    void testProvidesBlockWriter_IOException() {
+        BlockNodeContext blockNodeContext = mock(BlockNodeContext.class);
+        PersistenceStorageConfig persistenceStorageConfig = mock(PersistenceStorageConfig.class);
+        when(persistenceStorageConfig.rootPath()).thenReturn("invalid-path*9/////+>");
+        Configuration configuration = mock(Configuration.class);
+        when(blockNodeContext.configuration()).thenReturn(configuration);
+        when(configuration.getConfigData(PersistenceStorageConfig.class))
+                .thenReturn(persistenceStorageConfig);
+
+        // Expect a RuntimeException due to the IOException
+        RuntimeException exception =
+                assertThrows(
+                        RuntimeException.class,
+                        () -> PersistenceInjectionModule.providesBlockWriter(blockNodeContext));
+
+        // Verify the exception message
+        assertTrue(exception.getMessage().contains("Failed to create block writer"));
+    }
+
     @Test
     void testProvidesBlockReader() {