1 files changed, 17 insertions, 0 deletions
diff --git a/spec/ruby/command_line/dash_p_spec.rb b/spec/ruby/command_line/dash_p_spec.rb
new file mode 100644
index 0000000000..67562b5bc3
--- /dev/null
+++ b/spec/ruby/command_line/dash_p_spec.rb
@@ -0,0 +1,17 @@
+describe "The -p command line option" do
+  before :each do
+    @names  = fixture __FILE__, "names.txt"
+  end
+
+  it "runs the code in loop conditional on Kernel.gets() and prints $_" do
+    ruby_exe("$_ = $_.upcase", options: "-p", escape: true,
+                               args: " < #{@names}").should ==
+      "ALICE\nBOB\nJAMES\n"
+  end
+
+  it "sets $-p" do
+    ruby_exe("$_ = $-p", options: "-p", escape: true,
+                         args: " < #{@names}").should ==
+      "truetruetrue"
+  end
+end