1 files changed, 102 insertions, 0 deletions
diff --git a/src/arrow/ruby/red-arrow/test/test-decimal256.rb b/src/arrow/ruby/red-arrow/test/test-decimal256.rb
new file mode 100644
index 000000000..422167f99
--- /dev/null
+++ b/src/arrow/ruby/red-arrow/test/test-decimal256.rb
@@ -0,0 +1,102 @@
+# 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 Decimal256Test < Test::Unit::TestCase
+  sub_test_case("instance methods") do
+    def setup
+      @decimal256 = Arrow::Decimal256.new("10.1")
+    end
+
+    sub_test_case("#==") do
+      test("Arrow::Decimal256") do
+        assert do
+          @decimal256 == @decimal256
+        end
+      end
+
+      test("not Arrow::Decimal256") do
+        assert do
+          not (@decimal256 == 10.1)
+        end
+      end
+    end
+
+    sub_test_case("#!=") do
+      test("Arrow::Decimal256") do
+        assert do
+          not (@decimal256 != @decimal256)
+        end
+      end
+
+      test("not Arrow::Decimal256") do
+        assert do
+          @decimal256 != 10.1
+        end
+      end
+    end
+
+    sub_test_case("#to_s") do
+      test("default") do
+        assert_equal("101",
+                     @decimal256.to_s)
+      end
+
+      test("scale") do
+        assert_equal("10.1",
+                     @decimal256.to_s(1))
+      end
+    end
+
+    test("#abs") do
+      decimal256 = Arrow::Decimal256.new("-10.1")
+      assert_equal([
+                     Arrow::Decimal256.new("-10.1"),
+                     Arrow::Decimal256.new("10.1"),
+                   ],
+                   [
+                     decimal256,
+                     decimal256.abs,
+                   ])
+    end
+
+    test("#abs!") do
+      decimal256 = Arrow::Decimal256.new("-10.1")
+      decimal256.abs!
+      assert_equal(Arrow::Decimal256.new("10.1"),
+                   decimal256)
+    end
+
+    test("#negate") do
+      decimal256 = Arrow::Decimal256.new("-10.1")
+      assert_equal([
+                     Arrow::Decimal256.new("-10.1"),
+                     Arrow::Decimal256.new("10.1"),
+                   ],
+                   [
+                     decimal256,
+                     decimal256.negate,
+                   ])
+    end
+
+    test("#negate!") do
+      decimal256 = Arrow::Decimal256.new("-10.1")
+      decimal256.negate!
+      assert_equal(Arrow::Decimal256.new("10.1"),
+                   decimal256)
+    end
+  end
+end