1 files changed, 102 insertions, 0 deletions
diff --git a/spec/ruby/library/stringio/print_spec.rb b/spec/ruby/library/stringio/print_spec.rb
new file mode 100644
index 0000000000..48728e5f14
--- /dev/null
+++ b/spec/ruby/library/stringio/print_spec.rb
@@ -0,0 +1,102 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "StringIO#print" do
+  before :each do
+    @io = StringIO.new(+'example')
+  end
+
+  it "prints $_ when passed no arguments" do
+    $_ = nil
+    @io.print
+    @io.string.should == "example"
+
+    $_ = "blah"
+    @io.print
+    @io.string.should == "blahple"
+  end
+
+  it "prints the passed arguments to self" do
+    @io.print(5, 6, 7, 8)
+    @io.string.should == "5678ple"
+  end
+
+  it "tries to convert the passed Object to a String using #to_s" do
+    obj = mock("to_s")
+    obj.should_receive(:to_s).and_return("to_s")
+    @io.print(obj)
+    @io.string.should == "to_sple"
+  end
+
+  it "returns nil" do
+    @io.print(1, 2, 3).should == nil
+  end
+
+  it "pads self with \\000 when the current position is after the end" do
+    @io.pos = 10
+    @io.print(1, 2, 3)
+    @io.string.should == "example\000\000\000123"
+  end
+
+  it "honors the output record separator global" do
+    old_rs = $\
+    suppress_warning {$\ = 'x'}
+
+    begin
+      @io.print(5, 6, 7, 8)
+      @io.string.should == '5678xle'
+    ensure
+      suppress_warning {$\ = old_rs}
+    end
+  end
+
+  it "updates the current position" do
+    @io.print(1, 2, 3)
+    @io.pos.should.eql?(3)
+
+    @io.print(1, 2, 3)
+    @io.pos.should.eql?(6)
+  end
+
+  it "correctly updates the current position when honoring the output record separator global" do
+    old_rs = $\
+    suppress_warning {$\ = 'x'}
+
+    begin
+      @io.print(5, 6, 7, 8)
+      @io.pos.should.eql?(5)
+    ensure
+      suppress_warning {$\ = old_rs}
+    end
+  end
+end
+
+describe "StringIO#print when in append mode" do
+  before :each do
+    @io = StringIO.new(+"example", "a")
+  end
+
+  it "appends the passed argument to the end of self" do
+    @io.print(", just testing")
+    @io.string.should == "example, just testing"
+
+    @io.print(" and more testing")
+    @io.string.should == "example, just testing and more testing"
+  end
+
+  it "correctly updates self's position" do
+    @io.print(", testing")
+    @io.pos.should.eql?(16)
+  end
+end
+
+describe "StringIO#print when self is not writable" do
+  it "raises an IOError" do
+    io = StringIO.new(+"test", "r")
+    -> { io.print("test") }.should.raise(IOError)
+
+    io = StringIO.new(+"test")
+    io.close_write
+    -> { io.print("test") }.should.raise(IOError)
+  end
+end