echonesis commented on code in PR #9371:
URL: https://github.com/apache/ozone/pull/9371#discussion_r2597880584


##########
hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestBucketPut.java:
##########
@@ -72,17 +127,125 @@ public void testBucketPut() throws Exception {
     // Create-bucket on an existing bucket fails
     OS3Exception e = assertThrows(OS3Exception.class, () -> bucketEndpoint.put(
         bucketName, null, null));
-    assertEquals(HTTP_CONFLICT, e.getHttpCode());
     assertEquals(BUCKET_ALREADY_EXISTS.getCode(), e.getCode());
+    assertEquals(HTTP_CONFLICT, e.getHttpCode());
+  }
+
+  @Test
+  public void testPutAclOnNonExistingBucket() throws Exception {
+    OS3Exception e = assertThrows(OS3Exception.class,
+        () -> bucketEndpoint.put(bucketName, "acl", null));
+    assertEquals(NO_SUCH_BUCKET.getCode(), e.getCode());
+    assertEquals(HTTP_NOT_FOUND, e.getHttpCode());
+  }
+
+  @Test
+  public void testPutAclWithGrantFullControlHeader() throws Exception {
+    bucketEndpoint.getClient().getObjectStore().createS3Bucket(bucketName);
+
+    when(mockHeaders.getHeaderString(S3Acl.GRANT_FULL_CONTROL))
+        .thenReturn("id=\"owner-id\"");
+
+    Response resp = bucketEndpoint.put(bucketName, "acl", null);
+
+    assertEquals(200, resp.getStatus());
+  }
+
+  @Test
+  public void testPutAclWithInvalidXmlBody() throws Exception {
+    bucketEndpoint.getClient().getObjectStore().createS3Bucket(bucketName);
+
+    InputStream body = new ByteArrayInputStream(
+        "not-xml".getBytes(StandardCharsets.UTF_8));
+
+    WebApplicationException wae = assertThrows(WebApplicationException.class,
+        () -> bucketEndpoint.put(bucketName, "acl", body));
+
+    Throwable cause = wae.getCause();
+    assertNotNull(cause);
+    assertTrue(cause instanceof OS3Exception);
+    OS3Exception os3 = (OS3Exception) cause;
+
+    assertEquals(INVALID_REQUEST.getCode(), os3.getCode());
+    assertEquals(400, os3.getHttpCode());
   }
 
   @Test
-  public void testBucketFailWithInvalidHeader() throws Exception {
-    try {
-      bucketEndpoint.put(bucketName, null, null);
-    } catch (OS3Exception ex) {
-      assertEquals(HTTP_NOT_FOUND, ex.getHttpCode());
-      assertEquals(MALFORMED_HEADER.getCode(), ex.getCode());
-    }
+  public void testPutAclWithMalformedGrantHeader() throws Exception {
+    bucketEndpoint.getClient().getObjectStore().createS3Bucket(bucketName);
+
+    when(mockHeaders.getHeaderString(S3Acl.GRANT_FULL_CONTROL))
+        .thenReturn("id\"owner-id\"");
+
+    OS3Exception ex = assertThrows(OS3Exception.class,
+        () -> bucketEndpoint.put(bucketName, "acl", null));
+
+    assertEquals(INVALID_ARGUMENT.getCode(), ex.getCode());
+    assertEquals(400, ex.getHttpCode());
+  }
+
+  @Test
+  public void testPutAclWithBothHeadersAndBody() throws Exception {
+    bucketEndpoint.getClient().getObjectStore().createS3Bucket(bucketName);
+
+    // Header: READ
+    when(mockHeaders.getHeaderString(S3Acl.GRANT_READ))
+        .thenReturn("id=owner-id");
+
+    // Body: FULL_CONTROL
+    InputStream body = new ByteArrayInputStream(
+        VALID_ACL_XML.getBytes(StandardCharsets.UTF_8));
+
+    Response resp = bucketEndpoint.put(bucketName, "acl", body);
+    assertEquals(200, resp.getStatus());
+
+    OzoneBucket bucket = bucketEndpoint.getClient()
+         .getObjectStore()
+         .getS3Bucket(bucketName);
+
+    List<OzoneAcl> acls = bucket.getAcls();
+    assertFalse(acls.isEmpty());
+
+    OzoneAcl ownerAcl = acls.stream()
+         .filter(acl -> "owner-id".equals(acl.getName())
+             && acl.getAclScope() == ACCESS)
+         .findFirst()
+         .orElseThrow(() -> new AssertionError("owner-id ACL not found"));
+
+    assertEquals("owner-id", ownerAcl.getName());
+
+    List<IAccessAuthorizer.ACLType> permissions = ownerAcl.getAclList();
+
+    assertTrue(permissions.contains(IAccessAuthorizer.ACLType.READ),
+        "Expected READ permission from header");
+
+    assertFalse(permissions.contains(IAccessAuthorizer.ACLType.ALL),
+        "FULL_CONTROL/ALL from body should not be applied when header is 
present");
+  }
+
+  @Test
+  public void testPutAclWithEmptyGrantHeaderValue() throws Exception {
+    bucketEndpoint.getClient().getObjectStore().createS3Bucket(bucketName);
+
+    when(mockHeaders.getHeaderString(S3Acl.GRANT_FULL_CONTROL))
+        .thenReturn(""); // empty
+
+    Response resp = bucketEndpoint.put(bucketName, "acl", null);
+
+    Assertions.assertEquals(200, resp.getStatus());
+  }
+
+  @Test
+  public void testPutAclWithWhitespaceGrantHeaderValue() throws Exception {
+    bucketEndpoint.getClient().getObjectStore().createS3Bucket(bucketName);
+
+    when(mockHeaders.getHeaderString(S3Acl.GRANT_FULL_CONTROL))
+        .thenReturn("  "); // whitespace only

Review Comment:
   Consider introducing a static constant for the whitespace string to improve 
readability:
   ```suggestion
       private static final String WHITESPACE_ONLY = "  ";
   
       when(mockHeaders.getHeaderString(S3Acl.GRANT_FULL_CONTROL))
           .thenReturn(WHITESPACE_ONLY);
   ```



##########
hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestBucketPut.java:
##########
@@ -72,17 +127,125 @@ public void testBucketPut() throws Exception {
     // Create-bucket on an existing bucket fails
     OS3Exception e = assertThrows(OS3Exception.class, () -> bucketEndpoint.put(
         bucketName, null, null));
-    assertEquals(HTTP_CONFLICT, e.getHttpCode());
     assertEquals(BUCKET_ALREADY_EXISTS.getCode(), e.getCode());
+    assertEquals(HTTP_CONFLICT, e.getHttpCode());
+  }
+
+  @Test
+  public void testPutAclOnNonExistingBucket() throws Exception {
+    OS3Exception e = assertThrows(OS3Exception.class,
+        () -> bucketEndpoint.put(bucketName, "acl", null));
+    assertEquals(NO_SUCH_BUCKET.getCode(), e.getCode());
+    assertEquals(HTTP_NOT_FOUND, e.getHttpCode());
+  }
+
+  @Test
+  public void testPutAclWithGrantFullControlHeader() throws Exception {
+    bucketEndpoint.getClient().getObjectStore().createS3Bucket(bucketName);
+
+    when(mockHeaders.getHeaderString(S3Acl.GRANT_FULL_CONTROL))
+        .thenReturn("id=\"owner-id\"");
+
+    Response resp = bucketEndpoint.put(bucketName, "acl", null);
+
+    assertEquals(200, resp.getStatus());
+  }
+
+  @Test
+  public void testPutAclWithInvalidXmlBody() throws Exception {
+    bucketEndpoint.getClient().getObjectStore().createS3Bucket(bucketName);
+
+    InputStream body = new ByteArrayInputStream(
+        "not-xml".getBytes(StandardCharsets.UTF_8));
+
+    WebApplicationException wae = assertThrows(WebApplicationException.class,
+        () -> bucketEndpoint.put(bucketName, "acl", body));
+
+    Throwable cause = wae.getCause();
+    assertNotNull(cause);
+    assertTrue(cause instanceof OS3Exception);
+    OS3Exception os3 = (OS3Exception) cause;
+
+    assertEquals(INVALID_REQUEST.getCode(), os3.getCode());
+    assertEquals(400, os3.getHttpCode());
   }
 
   @Test
-  public void testBucketFailWithInvalidHeader() throws Exception {
-    try {
-      bucketEndpoint.put(bucketName, null, null);
-    } catch (OS3Exception ex) {
-      assertEquals(HTTP_NOT_FOUND, ex.getHttpCode());
-      assertEquals(MALFORMED_HEADER.getCode(), ex.getCode());
-    }
+  public void testPutAclWithMalformedGrantHeader() throws Exception {
+    bucketEndpoint.getClient().getObjectStore().createS3Bucket(bucketName);
+
+    when(mockHeaders.getHeaderString(S3Acl.GRANT_FULL_CONTROL))
+        .thenReturn("id\"owner-id\"");
+
+    OS3Exception ex = assertThrows(OS3Exception.class,
+        () -> bucketEndpoint.put(bucketName, "acl", null));
+
+    assertEquals(INVALID_ARGUMENT.getCode(), ex.getCode());
+    assertEquals(400, ex.getHttpCode());
+  }
+
+  @Test
+  public void testPutAclWithBothHeadersAndBody() throws Exception {
+    bucketEndpoint.getClient().getObjectStore().createS3Bucket(bucketName);
+
+    // Header: READ
+    when(mockHeaders.getHeaderString(S3Acl.GRANT_READ))
+        .thenReturn("id=owner-id");
+
+    // Body: FULL_CONTROL
+    InputStream body = new ByteArrayInputStream(
+        VALID_ACL_XML.getBytes(StandardCharsets.UTF_8));
+
+    Response resp = bucketEndpoint.put(bucketName, "acl", body);
+    assertEquals(200, resp.getStatus());
+
+    OzoneBucket bucket = bucketEndpoint.getClient()
+         .getObjectStore()
+         .getS3Bucket(bucketName);
+
+    List<OzoneAcl> acls = bucket.getAcls();
+    assertFalse(acls.isEmpty());
+
+    OzoneAcl ownerAcl = acls.stream()
+         .filter(acl -> "owner-id".equals(acl.getName())
+             && acl.getAclScope() == ACCESS)
+         .findFirst()
+         .orElseThrow(() -> new AssertionError("owner-id ACL not found"));
+
+    assertEquals("owner-id", ownerAcl.getName());
+
+    List<IAccessAuthorizer.ACLType> permissions = ownerAcl.getAclList();
+
+    assertTrue(permissions.contains(IAccessAuthorizer.ACLType.READ),
+        "Expected READ permission from header");
+
+    assertFalse(permissions.contains(IAccessAuthorizer.ACLType.ALL),
+        "FULL_CONTROL/ALL from body should not be applied when header is 
present");
+  }
+
+  @Test
+  public void testPutAclWithEmptyGrantHeaderValue() throws Exception {
+    bucketEndpoint.getClient().getObjectStore().createS3Bucket(bucketName);
+
+    when(mockHeaders.getHeaderString(S3Acl.GRANT_FULL_CONTROL))
+        .thenReturn(""); // empty
+
+    Response resp = bucketEndpoint.put(bucketName, "acl", null);
+
+    Assertions.assertEquals(200, resp.getStatus());
+  }
+
+  @Test
+  public void testPutAclWithWhitespaceGrantHeaderValue() throws Exception {
+    bucketEndpoint.getClient().getObjectStore().createS3Bucket(bucketName);
+
+    when(mockHeaders.getHeaderString(S3Acl.GRANT_FULL_CONTROL))
+        .thenReturn("  "); // whitespace only
+
+    OS3Exception ex = assertThrows(OS3Exception.class,
+        () -> bucketEndpoint.put(bucketName, "acl", null));
+
+    Assertions.assertEquals(INVALID_ARGUMENT.getCode(), ex.getCode());

Review Comment:
   ```suggestion
       assertEquals(INVALID_ARGUMENT.getCode(), ex.getCode());
   ```
   `assertEquals` is enough.



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