hiroyuki-sato commented on code in PR #46305:
URL: https://github.com/apache/arrow/pull/46305#discussion_r2075580735


##########
c_glib/test/test-fixed-shape-tensor-data-type.rb:
##########
@@ -0,0 +1,82 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+
+class TestFixedShapeTensorDataType < Test::Unit::TestCase
+  def test_type
+    data_type = Arrow::FixedShapeTensorDataType.new(Arrow::UInt64DataType.new,
+                                                    [3, 4],
+                                                    [1, 0],
+                                                    ["x", "y"])
+    assert_equal(Arrow::Type::EXTENSION, data_type.id)
+  end
+
+  def test_name
+    data_type = Arrow::FixedShapeTensorDataType.new(Arrow::UInt64DataType.new,
+                                                    [3, 4],
+                                                    [1, 0],
+                                                    ["x", "y"])
+    assert_equal("extension", data_type.name)
+    assert_equal("arrow.fixed_shape_tensor", data_type.extension_name)
+  end
+
+  def test_to_s
+    data_type = Arrow::FixedShapeTensorDataType.new(Arrow::UInt64DataType.new,
+                                                    [3, 4],
+                                                    [1, 0],
+                                                    ["x", "y"])
+    
assert_true(data_type.to_s.start_with?("extension<arrow.fixed_shape_tensor"))
+  end
+
+  def test_empty_shape
+    data_type = Arrow::FixedShapeTensorDataType.new(Arrow::UInt64DataType.new,
+                                                    [],
+                                                    [],
+                                                    [])
+    assert_equal(Arrow::Type::EXTENSION, data_type.id)

Review Comment:
   Removed this test. This test creates the following instance. I'm not sure 
whether  this instance is useful or not. 
   
   ```
   #<Arrow::FixedShapeTensorDataType:0x00000001250349d8 ptr=0x000060000054fee0 
extension<arrow.fixed_shape_tensor[value_type=uint64, shape=[]]>>
   ```



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