1 files changed, 28 insertions, 0 deletions
diff --git a/spec/ruby/core/argf/shared/filename.rb b/spec/ruby/core/argf/shared/filename.rb
new file mode 100644
index 0000000000..f47c673dc0
--- /dev/null
+++ b/spec/ruby/core/argf/shared/filename.rb
@@ -0,0 +1,28 @@
+describe :argf_filename, shared: true do
+  before :each do
+    @file1 = fixture __FILE__, "file1.txt"
+    @file2 = fixture __FILE__, "file2.txt"
+  end
+
+  # NOTE: this test assumes that fixtures files have two lines each
+  it "returns the current file name on each file" do
+    argf [@file1, @file2] do
+      result = []
+      # returns first current file even when not yet open
+      result << @argf.send(@method)
+      result << @argf.send(@method) while @argf.gets
+      # returns last current file even when closed
+      result << @argf.send(@method)
+
+      result.map! { |f| File.expand_path(f) }
+      result.should == [@file1, @file1, @file1, @file2, @file2, @file2]
+    end
+  end
+
+  # NOTE: this test assumes that fixtures files have two lines each
+  it "sets the $FILENAME global variable with the current file name on each file" do
+    script = fixture __FILE__, "filename.rb"
+    out = ruby_exe(script, args: [@file1, @file2])
+    out.should == "#{@file1}\n#{@file1}\n#{@file2}\n#{@file2}\n#{@file2}\n"
+  end
+end