1 files changed, 112 insertions, 0 deletions
diff --git a/src/arrow/ruby/red-arrow/test/test-struct-data-type.rb b/src/arrow/ruby/red-arrow/test/test-struct-data-type.rb
new file mode 100644
index 000000000..d106e38b1
--- /dev/null
+++ b/src/arrow/ruby/red-arrow/test/test-struct-data-type.rb
@@ -0,0 +1,112 @@
+# 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 StructDataTypeTest < Test::Unit::TestCase
+  def setup
+    @count_field = Arrow::Field.new("count", :uint32)
+    @visible_field = Arrow::Field.new("visible", :boolean)
+  end
+
+  sub_test_case(".new") do
+    test("[Arrow::Field]") do
+      fields = [
+        @count_field,
+        @visible_field,
+      ]
+      assert_equal("struct<count: uint32, visible: bool>",
+                   Arrow::StructDataType.new(fields).to_s)
+    end
+
+    test("[Hash]") do
+      fields = [
+        {name: "count", data_type: :uint32},
+        {name: "visible", data_type: :boolean},
+      ]
+      assert_equal("struct<count: uint32, visible: bool>",
+                   Arrow::StructDataType.new(fields).to_s)
+    end
+
+    test("[Arrow::Field, Hash]") do
+      fields = [
+        @count_field,
+        {name: "visible", data_type: :boolean},
+      ]
+      assert_equal("struct<count: uint32, visible: bool>",
+                   Arrow::StructDataType.new(fields).to_s)
+    end
+
+    test("{Arrow::DataType}") do
+      fields = {
+        "count" => Arrow::UInt32DataType.new,
+        "visible" => Arrow::BooleanDataType.new,
+      }
+      assert_equal("struct<count: uint32, visible: bool>",
+                   Arrow::StructDataType.new(fields).to_s)
+    end
+
+    test("{Hash}") do
+      fields = {
+        "count" => {type: :uint32},
+        "visible" => {type: :boolean},
+      }
+      assert_equal("struct<count: uint32, visible: bool>",
+                   Arrow::StructDataType.new(fields).to_s)
+    end
+
+    test("{String, Symbol}") do
+      fields = {
+        "count" => "uint32",
+        "visible" => :boolean,
+      }
+      assert_equal("struct<count: uint32, visible: bool>",
+                   Arrow::StructDataType.new(fields).to_s)
+    end
+  end
+
+  sub_test_case("instance methods") do
+    def setup
+      super
+      @data_type = Arrow::StructDataType.new([@count_field, @visible_field])
+    end
+
+    sub_test_case("#[]") do
+      test("[String]") do
+        assert_equal([@count_field, @visible_field],
+                     [@data_type["count"], @data_type["visible"]])
+      end
+
+      test("[Symbol]") do
+        assert_equal([@count_field, @visible_field],
+                     [@data_type[:count], @data_type[:visible]])
+      end
+
+      test("[Integer]") do
+        assert_equal([@count_field, @visible_field],
+                     [@data_type[0], @data_type[1]])
+      end
+
+      test("[invalid]") do
+        invalid = []
+        message = "field name or index must be String, Symbol or Integer"
+        message << ": <#{invalid.inspect}>"
+        assert_raise(ArgumentError.new(message)) do
+          @data_type[invalid]
+        end
+      end
+    end
+  end
+end