1 files changed, 92 insertions, 0 deletions
diff --git a/spec/ruby/library/stringio/readlines_spec.rb b/spec/ruby/library/stringio/readlines_spec.rb
new file mode 100644
index 0000000000..215a6cbb2a
--- /dev/null
+++ b/spec/ruby/library/stringio/readlines_spec.rb
@@ -0,0 +1,92 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "StringIO#readlines when passed [separator]" do
+  before :each do
+    @io = StringIO.new("this>is>an>example")
+  end
+
+  it "returns an Array containing lines based on the passed separator" do
+    @io.readlines(">").should == ["this>", "is>", "an>", "example"]
+  end
+
+  it "updates self's position based on the number of read bytes" do
+    @io.readlines(">")
+    @io.pos.should eql(18)
+  end
+
+  it "updates self's lineno based on the number of read lines" do
+    @io.readlines(">")
+    @io.lineno.should eql(4)
+  end
+
+  it "does not change $_" do
+    $_ = "test"
+    @io.readlines(">")
+    $_.should == "test"
+  end
+
+  it "returns an Array containing all paragraphs when the passed separator is an empty String" do
+    io = StringIO.new("this is\n\nan example")
+    io.readlines("").should == ["this is\n\n", "an example"]
+  end
+
+  it "returns the remaining content as one line starting at the current position when passed nil" do
+    io = StringIO.new("this is\n\nan example")
+    io.pos = 5
+    io.readlines(nil).should == ["is\n\nan example"]
+  end
+
+  it "tries to convert the passed separator to a String using #to_str" do
+    obj = mock('to_str')
+    obj.stub!(:to_str).and_return(">")
+    @io.readlines(obj).should == ["this>", "is>", "an>", "example"]
+  end
+end
+
+describe "StringIO#readlines when passed no argument" do
+  before :each do
+    @io = StringIO.new("this is\nan example\nfor StringIO#readlines")
+  end
+
+  it "returns an Array containing lines based on $/" do
+    begin
+      old_sep, $/ = $/, " "
+      @io.readlines.should == ["this ", "is\nan ", "example\nfor ", "StringIO#readlines"]
+    ensure
+      $/ = old_sep
+    end
+  end
+
+  it "updates self's position based on the number of read bytes" do
+    @io.readlines
+    @io.pos.should eql(41)
+  end
+
+  it "updates self's lineno based on the number of read lines" do
+    @io.readlines
+    @io.lineno.should eql(3)
+  end
+
+  it "does not change $_" do
+    $_ = "test"
+    @io.readlines(">")
+    $_.should == "test"
+  end
+
+  it "returns an empty Array when self is at the end" do
+    @io.pos = 41
+    @io.readlines.should == []
+  end
+end
+
+describe "StringIO#readlines when in write-only mode" do
+  it "raises an IOError" do
+    io = StringIO.new("xyz", "w")
+    lambda { io.readlines }.should raise_error(IOError)
+
+    io = StringIO.new("xyz")
+    io.close_read
+    lambda { io.readlines }.should raise_error(IOError)
+  end
+end