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diff --git a/src/arrow/ruby/red-arrow/test/test-date64-array.rb b/src/arrow/ruby/red-arrow/test/test-date64-array.rb
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+# 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 Date64ArrayTest < Test::Unit::TestCase
+ test("#[]") do
+ n_msecs_since_epoch = 1503878400000 # 2017-08-28T00:00:00Z
+ array = Arrow::Date64Array.new([n_msecs_since_epoch])
+ assert_equal(DateTime.new(2017, 8, 28, 0, 0, 0),
+ array[0])
+ end
+end