fix: Properties were not correctly passed down to the S3FileSystem.

src/main/java/org/carlspring/cloud/storage/s3fs/S3FileSystem.java

@@ -181,6 +181,16 @@ public int getCache()
         return cache;
     }
 
+    /**
+     * Used for internal testing.
+     * @return the properties with which this file system was initialized.
+     */
+    protected Properties getProperties()
+    {
+        Properties copy = new Properties();
+        copy.putAll(properties);
+        return copy;
+    }
 
     /**
      * @return The value of the {@link S3Factory#REQUEST_HEADER_CACHE_CONTROL} property. Default is empty.

src/main/java/org/carlspring/cloud/storage/s3fs/S3FileSystemProvider.java

@@ -1107,7 +1107,8 @@ public S3FileSystem createFileSystem(URI uri,
         final String key = getFileSystemKey(uri, props);
         final S3Client client = getS3Client(uri, props);
         final String host = uri.getHost();
-        final Properties properties = new Properties(props);
+        final Properties properties = new Properties();
+        properties.putAll(props);
         return new S3FileSystem(this, key, client, host, properties);
     }
 

src/test/java/org/carlspring/cloud/storage/s3fs/S3FileSystemTest.java

@@ -16,6 +16,7 @@
 import java.nio.file.attribute.PosixFilePermissions;
 import java.util.Iterator;
 import java.util.Map;
+import java.util.Properties;
 import java.util.Set;
 
 import com.google.common.collect.ImmutableMap;
@@ -26,7 +27,13 @@
 import software.amazon.awssdk.services.s3.S3Client;
 import software.amazon.awssdk.services.s3.S3Utilities;
 import software.amazon.awssdk.services.s3.model.GetUrlRequest;
+
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.carlspring.cloud.storage.s3fs.S3Factory.ACCESS_KEY;
+import static org.carlspring.cloud.storage.s3fs.S3Factory.CONNECTION_TIMEOUT;
+import static org.carlspring.cloud.storage.s3fs.S3Factory.MAX_CONNECTIONS;
+import static org.carlspring.cloud.storage.s3fs.S3Factory.REGION;
+import static org.carlspring.cloud.storage.s3fs.S3Factory.REQUEST_HEADER_CACHE_CONTROL;
 import static org.carlspring.cloud.storage.s3fs.S3Factory.SECRET_KEY;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
@@ -326,6 +333,17 @@ void comparables()
         s3fs11.close();
     }
 
+    @Test
+    void propertiesMustBePreserved()
+    {
+        S3FileSystemProvider provider = new S3FileSystemProvider();
+
+        Map<String, ?> inputProps = buildFakeEnv();
+        S3FileSystem s3fs1 = (S3FileSystem) provider.newFileSystem(URI.create("s3://mirror1.amazon.test/"), inputProps);
+        Properties outputProps = s3fs1.getProperties();
+        assertThat(outputProps).containsAllEntriesOf(inputProps);
+    }
+
     @Test
     void key2Parts()
             throws IOException
@@ -458,9 +476,15 @@ void isSameFile()
 
     private Map<String, ?> buildFakeEnv()
     {
-        return ImmutableMap.<String, Object>builder().put(ACCESS_KEY, "access-key")
-                                                     .put(SECRET_KEY, "secret-key")
-                                                     .build();
+        return ImmutableMap.<String, Object>builder()
+                           //.put("s3fs.amazon.s3.factory.class", S3MockFactory.class)
+                           .put(ACCESS_KEY, "access-key")
+                           .put(SECRET_KEY, "secret-key")
+                           .put(MAX_CONNECTIONS, "1000")
+                           .put(CONNECTION_TIMEOUT, "2000")
+                           .put(REQUEST_HEADER_CACHE_CONTROL, "no-cache")
+                           .put(REGION, "eu-west-1")
+                           .build();
     }
 
 }