1 files changed, 22 insertions, 0 deletions
diff --git a/spec/ruby/command_line/dash_d_spec.rb b/spec/ruby/command_line/dash_d_spec.rb
new file mode 100644
index 0000000000..009a14e16c
--- /dev/null
+++ b/spec/ruby/command_line/dash_d_spec.rb
@@ -0,0 +1,22 @@
+require File.expand_path('../../spec_helper', __FILE__)
+
+describe "The -d command line option" do
+  before :each do
+    @script = fixture __FILE__, "debug.rb"
+  end
+
+  it "sets $DEBUG to true" do
+    ruby_exe(@script, options: "-d",
+                      args: "0 2> #{File::NULL}").chomp.should == "$DEBUG true"
+  end
+
+  it "sets $VERBOSE to true" do
+    ruby_exe(@script, options: "-d",
+                      args: "1 2> #{File::NULL}").chomp.should == "$VERBOSE true"
+  end
+
+  it "sets $-d to true" do
+    ruby_exe(@script, options: "-d",
+                      args: "2 2> #{File::NULL}").chomp.should == "$-d true"
+  end
+end