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Diffstat (limited to 'spec/ruby/library/stringio/putc_spec.rb')
-rw-r--r-- | spec/ruby/library/stringio/putc_spec.rb | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/spec/ruby/library/stringio/putc_spec.rb b/spec/ruby/library/stringio/putc_spec.rb new file mode 100644 index 0000000000..783e5a405b --- /dev/null +++ b/spec/ruby/library/stringio/putc_spec.rb @@ -0,0 +1,88 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) + +describe "StringIO#putc when passed [String]" do + before :each do + @io = StringIO.new('example') + end + + it "overwrites the character at the current position" do + @io.putc("t") + @io.string.should == "txample" + + @io.pos = 3 + @io.putc("t") + @io.string.should == "txatple" + end + + it "only writes the first character from the passed String" do + @io.putc("test") + @io.string.should == "txample" + end + + it "returns the passed String" do + str = "test" + @io.putc(str).should equal(str) + end + + it "correctly updates the current position" do + @io.putc("t") + @io.pos.should == 1 + + @io.putc("test") + @io.pos.should == 2 + + @io.putc("t") + @io.pos.should == 3 + end +end + +describe "StringIO#putc when passed [Object]" do + before :each do + @io = StringIO.new('example') + end + + it "it writes the passed Integer % 256 to self" do + @io.putc(333) # 333 % 256 == ?M + @io.string.should == "Mxample" + + @io.putc(-450) # -450 % 256 == ?> + @io.string.should == "M>ample" + end + + it "pads self with \\000 when the current position is after the end" do + @io.pos = 10 + @io.putc(?A) + @io.string.should == "example\000\000\000A" + end + + it "tries to convert the passed argument to an Integer using #to_int" do + obj = mock('to_int') + obj.should_receive(:to_int).and_return(116) + @io.putc(obj) + @io.string.should == "txample" + end + + it "raises a TypeError when the passed argument can't be coerced to Integer" do + lambda { @io.putc(Object.new) }.should raise_error(TypeError) + end +end + +describe "StringIO#putc when in append mode" do + it "appends to the end of self" do + io = StringIO.new("test", "a") + io.putc(?t) + io.string.should == "testt" + end +end + +describe "StringIO#putc when self is not writable" do + it "raises an IOError" do + io = StringIO.new("test", "r") + lambda { io.putc(?a) }.should raise_error(IOError) + + io = StringIO.new("test") + io.close_write + lambda { io.putc("t") }.should raise_error(IOError) + end +end |