1 files changed, 58 insertions, 0 deletions
diff --git a/spec/ruby/core/argf/shared/each_byte.rb b/spec/ruby/core/argf/shared/each_byte.rb
new file mode 100644
index 0000000000..48c9ae04f8
--- /dev/null
+++ b/spec/ruby/core/argf/shared/each_byte.rb
@@ -0,0 +1,58 @@
+describe :argf_each_byte, shared: true do
+  before :each do
+    @file1_name = fixture __FILE__, "file1.txt"
+    @file2_name = fixture __FILE__, "file2.txt"
+
+    @bytes = []
+    File.read(@file1_name).each_byte { |b| @bytes << b }
+    File.read(@file2_name).each_byte { |b| @bytes << b }
+  end
+
+  it "yields each byte of all streams to the passed block" do
+    argf [@file1_name, @file2_name] do
+      bytes = []
+      @argf.send(@method) { |b| bytes << b }
+      bytes.should == @bytes
+    end
+  end
+
+  it "returns self when passed a block" do
+    argf [@file1_name, @file2_name] do
+      @argf.send(@method) {}.should.equal?(@argf)
+    end
+  end
+
+  it "returns an Enumerator when passed no block" do
+    argf [@file1_name, @file2_name] do
+      enum = @argf.send(@method)
+      enum.should.instance_of?(Enumerator)
+
+      bytes = []
+      enum.each { |b| bytes << b }
+      bytes.should == @bytes
+    end
+  end
+
+  describe "when no block is given" do
+    it "returns an Enumerator" do
+      argf [@file1_name, @file2_name] do
+        enum = @argf.send(@method)
+        enum.should.instance_of?(Enumerator)
+
+        bytes = []
+        enum.each { |b| bytes << b }
+        bytes.should == @bytes
+      end
+    end
+
+    describe "returned Enumerator" do
+      describe "size" do
+        it "should return nil" do
+          argf [@file1_name, @file2_name] do
+            @argf.send(@method).size.should == nil
+          end
+        end
+      end
+    end
+  end
+end