1 files changed, 81 insertions, 0 deletions
diff --git a/src/arrow/ruby/red-arrow/test/test-sort-key.rb b/src/arrow/ruby/red-arrow/test/test-sort-key.rb
new file mode 100644
index 000000000..0a31f8461
--- /dev/null
+++ b/src/arrow/ruby/red-arrow/test/test-sort-key.rb
@@ -0,0 +1,81 @@
+# 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 SortKeyTest < Test::Unit::TestCase
+  sub_test_case(".resolve") do
+    test("SortKey") do
+      assert_equal(Arrow::SortKey.new("-count"),
+                   Arrow::SortKey.resolve(Arrow::SortKey.new("-count")))
+    end
+
+    test("-String") do
+      assert_equal(Arrow::SortKey.new("-count"),
+                   Arrow::SortKey.resolve("-count"))
+    end
+
+    test("Symbol, Symbol") do
+      assert_equal(Arrow::SortKey.new("-count"),
+                   Arrow::SortKey.resolve(:count, :desc))
+    end
+  end
+
+  sub_test_case("#initialize") do
+    test("String") do
+      assert_equal("+count",
+                   Arrow::SortKey.new("count").to_s)
+    end
+
+    test("+String") do
+      assert_equal("+count",
+                   Arrow::SortKey.new("+count").to_s)
+    end
+
+    test("-String") do
+      assert_equal("-count",
+                   Arrow::SortKey.new("-count").to_s)
+    end
+
+    test("Symbol") do
+      assert_equal("+-count",
+                   Arrow::SortKey.new(:"-count").to_s)
+    end
+
+    test("String, Symbol") do
+      assert_equal("--count",
+                   Arrow::SortKey.new("-count", :desc).to_s)
+    end
+
+    test("String, String") do
+      assert_equal("--count",
+                   Arrow::SortKey.new("-count", "desc").to_s)
+    end
+
+    test("String, SortOrder") do
+      assert_equal("--count",
+                   Arrow::SortKey.new("-count",
+                                      Arrow::SortOrder::DESCENDING).to_s)
+    end
+  end
+
+  sub_test_case("#to_s") do
+    test("recreatable") do
+      key = Arrow::SortKey.new("-count", :desc)
+      assert_equal(key,
+                   Arrow::SortKey.new(key.to_s))
+    end
+  end
+end