1 files changed, 43 insertions, 0 deletions
diff --git a/spec/ruby/library/stringio/shared/getc.rb b/spec/ruby/library/stringio/shared/getc.rb
new file mode 100644
index 0000000000..3e064f9c1e
--- /dev/null
+++ b/spec/ruby/library/stringio/shared/getc.rb
@@ -0,0 +1,43 @@
+describe :stringio_getc, shared: true do
+  before :each do
+    @io = StringIO.new("example")
+  end
+
+  it "increases self's position by one" do
+    @io.send(@method)
+    @io.pos.should eql(1)
+
+    @io.send(@method)
+    @io.pos.should eql(2)
+
+    @io.send(@method)
+    @io.pos.should eql(3)
+  end
+
+  it "returns nil when called at the end of self" do
+    @io.pos = 7
+    @io.send(@method).should be_nil
+    @io.send(@method).should be_nil
+    @io.send(@method).should be_nil
+  end
+
+  it "does not increase self's position when called at the end of file" do
+    @io.pos = 7
+    @io.send(@method)
+    @io.pos.should eql(7)
+
+    @io.send(@method)
+    @io.pos.should eql(7)
+  end
+end
+
+describe :stringio_getc_not_readable, shared: true do
+  it "raises an IOError" do
+    io = StringIO.new("xyz", "w")
+    lambda { io.send(@method) }.should raise_error(IOError)
+
+    io = StringIO.new("xyz")
+    io.close_read
+    lambda { io.send(@method) }.should raise_error(IOError)
+  end
+end