diff options
Diffstat (limited to 'spec/ruby/library/stringio/printf_spec.rb')
-rw-r--r-- | spec/ruby/library/stringio/printf_spec.rb | 33 |
1 files changed, 27 insertions, 6 deletions
diff --git a/spec/ruby/library/stringio/printf_spec.rb b/spec/ruby/library/stringio/printf_spec.rb index 9dd1a3b410..ca82e84757 100644 --- a/spec/ruby/library/stringio/printf_spec.rb +++ b/spec/ruby/library/stringio/printf_spec.rb @@ -4,7 +4,7 @@ require_relative '../../core/kernel/shared/sprintf' describe "StringIO#printf" do before :each do - @io = StringIO.new('example') + @io = StringIO.new() end it "returns nil" do @@ -12,9 +12,9 @@ describe "StringIO#printf" do end it "pads self with \\000 when the current position is after the end" do - @io.pos = 10 + @io.pos = 3 @io.printf("%d", 123) - @io.string.should == "example\000\000\000123" + @io.string.should == "\000\000\000123" end it "performs format conversion" do @@ -39,9 +39,30 @@ describe "StringIO#printf" do end end +describe "StringIO#printf when in read-write mode" do + before :each do + @io = StringIO.new(+"example", "r+") + end + + it "starts from the beginning" do + @io.printf("%s", "abcdefghijk") + @io.string.should == "abcdefghijk" + end + + it "does not truncate existing string" do + @io.printf("%s", "abc") + @io.string.should == "abcmple" + end + + it "correctly updates self's position" do + @io.printf("%s", "abc") + @io.pos.should eql(3) + end +end + describe "StringIO#printf when in append mode" do before :each do - @io = StringIO.new("example", "a") + @io = StringIO.new(+"example", "a") end it "appends the passed argument to the end of self" do @@ -60,10 +81,10 @@ end describe "StringIO#printf when self is not writable" do it "raises an IOError" do - io = StringIO.new("test", "r") + io = StringIO.new(+"test", "r") -> { io.printf("test") }.should raise_error(IOError) - io = StringIO.new("test") + io = StringIO.new(+"test") io.close_write -> { io.printf("test") }.should raise_error(IOError) end |