1 files changed, 25 insertions, 0 deletions
diff --git a/test/irb/test_init.rb b/test/irb/test_init.rb
new file mode 100644
index 0000000000..f2022253f9
--- /dev/null
+++ b/test/irb/test_init.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: false
+require "test/unit"
+require "irb"
+
+module TestIRB
+  class TestInit < Test::Unit::TestCase
+    def test_setup_with_argv_preserves_global_argv
+      argv = ["foo", "bar"]
+      with_argv(argv) do
+        IRB.setup(eval("__FILE__"), argv: [])
+        assert_equal argv, ARGV
+      end
+    end
+
+    private
+
+    def with_argv(argv)
+      orig = ARGV.dup
+      ARGV.replace(argv)
+      yield
+    ensure
+      ARGV.replace(orig)
+    end
+  end
+end