1 files changed, 69 insertions, 0 deletions
diff --git a/tool/test/testunit/test_launchable.rb b/tool/test/testunit/test_launchable.rb
new file mode 100644
index 0000000000..70c371e212
--- /dev/null
+++ b/tool/test/testunit/test_launchable.rb
@@ -0,0 +1,69 @@
+# frozen_string_literal: false
+require 'test/unit'
+require 'tempfile'
+require 'json'
+
+class TestLaunchable < Test::Unit::TestCase
+  def test_json_stream_writer
+    Tempfile.create(['launchable-test-', '.json']) do |f|
+      json_stream_writer = Test::Unit::LaunchableOption::JsonStreamWriter.new(f.path)
+      json_stream_writer.write_array('testCases')
+      json_stream_writer.write_object(
+        {
+          testPath: "file=test/test_a.rb#class=class1#testcase=testcase899",
+          duration: 42,
+          status: "TEST_FAILED",
+          stdout: nil,
+          stderr: nil,
+          createdAt: "2021-10-05T12:34:00",
+          data: {
+            lineNumber: 1
+          }
+        }
+      )
+      json_stream_writer.write_object(
+        {
+          testPath: "file=test/test_a.rb#class=class1#testcase=testcase899",
+          duration: 45,
+          status: "TEST_PASSED",
+          stdout: "This is stdout",
+          stderr: "This is stderr",
+          createdAt: "2021-10-05T12:36:00",
+          data: {
+            lineNumber: 10
+          }
+        }
+      )
+      json_stream_writer.close()
+      expected = <<JSON
+{
+  "testCases": [
+    {
+      "testPath": "file=test/test_a.rb#class=class1#testcase=testcase899",
+      "duration": 42,
+      "status": "TEST_FAILED",
+      "stdout": null,
+      "stderr": null,
+      "createdAt": "2021-10-05T12:34:00",
+      "data": {
+        "lineNumber": 1
+      }
+    },
+    {
+      "testPath": "file=test/test_a.rb#class=class1#testcase=testcase899",
+      "duration": 45,
+      "status": "TEST_PASSED",
+      "stdout": "This is stdout",
+      "stderr": "This is stderr",
+      "createdAt": "2021-10-05T12:36:00",
+      "data": {
+        "lineNumber": 10
+      }
+    }
+  ]
+}
+JSON
+      assert_equal(expected, f.read)
+    end
+  end
+end