diff options
Diffstat (limited to 'spec/rubyspec/core/io/syswrite_spec.rb')
-rw-r--r-- | spec/rubyspec/core/io/syswrite_spec.rb | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/spec/rubyspec/core/io/syswrite_spec.rb b/spec/rubyspec/core/io/syswrite_spec.rb new file mode 100644 index 0000000000..879423de2e --- /dev/null +++ b/spec/rubyspec/core/io/syswrite_spec.rb @@ -0,0 +1,54 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) +require File.expand_path('../shared/write', __FILE__) + +describe "IO#syswrite on a file" do + before :each do + @filename = tmp("IO_syswrite_file") + $$.to_s + File.open(@filename, "w") do |file| + file.syswrite("012345678901234567890123456789") + end + @file = File.open(@filename, "r+") + @readonly_file = File.open(@filename) + end + + after :each do + @file.close + @readonly_file.close + rm_r @filename + end + + it "writes all of the string's bytes but does not buffer them" do + written = @file.syswrite("abcde") + written.should == 5 + File.open(@filename) do |file| + file.sysread(10).should == "abcde56789" + file.seek(0) + @file.fsync + file.sysread(10).should == "abcde56789" + end + end + + it "warns if called immediately after a buffered IO#write" do + @file.write("abcde") + lambda { @file.syswrite("fghij") }.should complain(/syswrite/) + end + + it "does not warn if called after IO#write with intervening IO#sysread" do + @file.syswrite("abcde") + @file.sysread(5) + lambda { @file.syswrite("fghij") }.should_not complain + end + + it "writes to the actual file position when called after buffered IO#read" do + @file.read(5) + @file.syswrite("abcde") + File.open(@filename) do |file| + file.sysread(10).should == "01234abcde" + end + end +end + +describe "IO#syswrite" do + it_behaves_like :io_write, :syswrite +end |