1 files changed, 40 insertions, 0 deletions
diff --git a/src/arrow/ruby/red-arrow/test/test-expression.rb b/src/arrow/ruby/red-arrow/test/test-expression.rb
new file mode 100644
index 000000000..e172e78be
--- /dev/null
+++ b/src/arrow/ruby/red-arrow/test/test-expression.rb
@@ -0,0 +1,40 @@
+# 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 TestExpression < Test::Unit::TestCase
+  sub_test_case(".try_convert") do
+    test("Symbol") do
+      assert_equal(Arrow::FieldExpression.new("visible"),
+                   Arrow::Expression.try_convert(:visible))
+    end
+
+    test("[String]") do
+      assert_equal(Arrow::CallExpression.new("func", []),
+                   Arrow::Expression.try_convert(["func"]))
+    end
+
+    test("[Symbol]") do
+      assert_equal(Arrow::CallExpression.new("func", []),
+                   Arrow::Expression.try_convert([:func]))
+    end
+
+    test("[String, String]") do
+      assert_equal(Arrow::CallExpression.new("func", ["argument1"]),
+                   Arrow::Expression.try_convert(["func", "argument1"]))
+    end
+  end
+end