1 files changed, 57 insertions, 0 deletions

diff --git a/spec/ruby/shared/io/putc.rb b/spec/ruby/shared/io/putc.rb
new file mode 100644
index 0000000000..56902ccad5
--- /dev/null
+++ b/spec/ruby/shared/io/putc.rb
@@ -0,0 +1,57 @@
+# encoding: binary
+describe :io_putc, shared: true do
+  after :each do
+    @io.close if @io && !@io.closed?
+    @io_object = nil
+    rm_r @name
+  end
+
+  describe "with an Integer argument" do
+    it "writes one character as a String" do
+      @io.should_receive(:write).with("A")
+      @io_object.send(@method, 65).should == 65
+    end
+
+    it "writes the low byte as a String" do
+      @io.should_receive(:write).with("A")
+      @io_object.send(@method, 0x2441).should == 0x2441
+    end
+  end
+
+  describe "with a String argument" do
+    it "writes one character" do
+      @io.should_receive(:write).with("B")
+      @io_object.send(@method, "B").should == "B"
+    end
+
+    it "writes the first character" do
+      @io.should_receive(:write).with("R")
+      @io_object.send(@method, "Ruby").should == "Ruby"
+    end
+  end
+
+  it "calls #to_int to convert an object to an Integer" do
+    obj = mock("kernel putc")
+    obj.should_receive(:to_int).and_return(65)
+
+    @io.should_receive(:write).with("A")
+    @io_object.send(@method, obj).should == obj
+  end
+
+  it "raises IOError on a closed stream" do
+    @io.close
+    -> { @io_object.send(@method, "a") }.should.raise(IOError)
+  end
+
+  it "raises a TypeError when passed nil" do
+    -> { @io_object.send(@method, nil) }.should.raise(TypeError)
+  end
+
+  it "raises a TypeError when passed false" do
+    -> { @io_object.send(@method, false) }.should.raise(TypeError)
+  end
+
+  it "raises a TypeError when passed true" do
+    -> { @io_object.send(@method, true) }.should.raise(TypeError)
+  end
+end