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Diffstat (limited to 'spec/ruby/core/io/eof_spec.rb')
-rw-r--r-- | spec/ruby/core/io/eof_spec.rb | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/spec/ruby/core/io/eof_spec.rb b/spec/ruby/core/io/eof_spec.rb new file mode 100644 index 0000000000..a2c5e563f0 --- /dev/null +++ b/spec/ruby/core/io/eof_spec.rb @@ -0,0 +1,107 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) + +describe "IO#eof?" do + before :each do + @name = tmp("empty.txt") + touch @name + end + + after :each do + rm_r @name + end + + it "returns true on an empty stream that has just been opened" do + File.open(@name) { |empty| empty.eof?.should == true } + end + + it "raises IOError on stream not opened for reading" do + lambda do + File.open(@name, "w") { |f| f.eof? } + end.should raise_error(IOError) + end +end + +describe "IO#eof?" do + before :each do + @name = fixture __FILE__, "lines.txt" + @io = IOSpecs.io_fixture "lines.txt" + end + + after :each do + @io.close if @io && !@io.closed? + end + + it "returns false when not at end of file" do + @io.read 1 + @io.eof?.should == false + end + + it "returns true after reading with read with no parameters" do + @io.read() + @io.eof?.should == true + end + + it "returns true after reading with read" do + @io.read(File.size(@name)) + @io.eof?.should == true + end + + it "returns true after reading with sysread" do + @io.sysread(File.size(@name)) + @io.eof?.should == true + end + + it "returns true after reading with readlines" do + @io.readlines + @io.eof?.should == true + end + + it "returns false on just opened non-empty stream" do + @io.eof?.should == false + end + + it "does not consume the data from the stream" do + @io.eof?.should == false + @io.getc.should == 'V' + end + + it "raises IOError on closed stream" do + lambda { IOSpecs.closed_io.eof? }.should raise_error(IOError) + end + + it "raises IOError on stream closed for reading by close_read" do + @io.close_read + lambda { @io.eof? }.should raise_error(IOError) + end + + it "returns true on one-byte stream after single-byte read" do + File.open(File.dirname(__FILE__) + '/fixtures/one_byte.txt') { |one_byte| + one_byte.read(1) + one_byte.eof?.should == true + } + end +end + +describe "IO#eof?" do + after :each do + @r.close if @r && !@r.closed? + @w.close if @w && !@w.closed? + end + + it "returns true on receiving side of Pipe when writing side is closed" do + @r, @w = IO.pipe + @w.close + @r.eof?.should == true + end + + it "returns false on receiving side of Pipe when writing side wrote some data" do + @r, @w = IO.pipe + @w.puts "hello" + @r.eof?.should == false + @w.close + @r.eof?.should == false + @r.read + @r.eof?.should == true + end +end |