1 files changed, 54 insertions, 0 deletions
diff --git a/src/arrow/ruby/red-arrow/test/test-file-output-stream.rb b/src/arrow/ruby/red-arrow/test/test-file-output-stream.rb
new file mode 100644
index 000000000..559406a4e
--- /dev/null
+++ b/src/arrow/ruby/red-arrow/test/test-file-output-stream.rb
@@ -0,0 +1,54 @@
+# 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 TestFileOutputStream < Test::Unit::TestCase
+  sub_test_case(".open") do
+    def setup
+      @file = Tempfile.open("arrow-file-output-stream")
+      @file.write("Hello")
+      @file.close
+    end
+
+    def test_default
+      Arrow::FileOutputStream.open(@file.path) do |file|
+        file.write(" World")
+      end
+      assert_equal(" World", File.read(@file.path))
+    end
+
+    def test_options_append
+      Arrow::FileOutputStream.open(@file.path, append: true) do |file|
+        file.write(" World")
+      end
+      assert_equal("Hello World", File.read(@file.path))
+    end
+
+    def test_append_true
+      Arrow::FileOutputStream.open(@file.path, true) do |file|
+        file.write(" World")
+      end
+      assert_equal("Hello World", File.read(@file.path))
+    end
+
+    def test_append_false
+      Arrow::FileOutputStream.open(@file.path, false) do |file|
+        file.write(" World")
+      end
+      assert_equal(" World", File.read(@file.path))
+    end
+  end
+end