1 files changed, 53 insertions, 0 deletions
diff --git a/spec/ruby/library/stringio/read_nonblock_spec.rb b/spec/ruby/library/stringio/read_nonblock_spec.rb
new file mode 100644
index 0000000000..38ae7541ca
--- /dev/null
+++ b/spec/ruby/library/stringio/read_nonblock_spec.rb
@@ -0,0 +1,53 @@
+require_relative '../../spec_helper'
+require "stringio"
+require_relative 'shared/read'
+require_relative 'shared/sysread'
+
+describe "StringIO#read_nonblock when passed length, buffer" do
+  it_behaves_like :stringio_read, :read_nonblock
+
+  it "accepts :exception option" do
+    io = StringIO.new("example")
+    io.read_nonblock(3, buffer = +"", exception: true)
+    buffer.should == "exa"
+  end
+end
+
+describe "StringIO#read_nonblock when passed length" do
+  it_behaves_like :stringio_read_length, :read_nonblock
+
+  it "accepts :exception option" do
+    io = StringIO.new("example")
+    io.read_nonblock(3, exception: true).should == "exa"
+  end
+end
+
+describe "StringIO#read_nonblock when passed nil" do
+  it_behaves_like :stringio_read_nil, :read_nonblock
+end
+
+describe "StringIO#read_nonblock when passed length" do
+  it_behaves_like :stringio_sysread_length, :read_nonblock
+end
+
+describe "StringIO#read_nonblock" do
+
+  it "accepts an exception option" do
+    stringio = StringIO.new('foo')
+    stringio.read_nonblock(3, exception: false).should == 'foo'
+  end
+
+  context "when exception option is set to false" do
+    context "when the end is reached" do
+      it "returns nil" do
+        stringio = StringIO.new(+'')
+        stringio << "hello"
+        stringio.rewind
+
+        stringio.read_nonblock(5).should == "hello"
+        stringio.read_nonblock(5, exception: false).should == nil
+      end
+    end
+  end
+
+end