require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../../../shared/file/size', __FILE__)

describe "File.size?" do
  it_behaves_like :file_size,                     :size?, File
end

describe "File.size?" do
  it_behaves_like :file_size_to_io,               :size?, File
end

describe "File.size?" do
  it_behaves_like :file_size_nil_when_missing,    :size?, File
end

describe "File.size?" do
  it_behaves_like :file_size_nil_when_empty,      :size?, File
end

describe "File.size?" do
  it_behaves_like :file_size_with_file_argument,  :size?, File
end

describe "File.size" do
  it_behaves_like :file_size,                     :size,  File
end

describe "File.size" do
  it_behaves_like :file_size_to_io,               :size, File
end

describe "File.size" do
  it_behaves_like :file_size_raise_when_missing,  :size,  File
end

describe "File.size" do
  it_behaves_like :file_size_0_when_empty,        :size,  File
end

describe "File.size" do
  it_behaves_like :file_size_with_file_argument,  :size,  File
end

ruby_version_is "1.9" do
  describe "File#size" do

    before :each do
      @name = tmp('i_exist')
      touch(@name) { |f| f.write 'rubinius' }
      @file = File.new @name
      @file_org = @file
    end

    after :each do
      @file_org.close unless @file_org.closed?
      rm_r @name
    end

    it "is an instance method" do
      @file.respond_to?(:size).should be_true
    end

    it "returns the file's size as a Fixnum" do
      @file.size.should be_an_instance_of(Fixnum)
    end

    it "returns the file's size in bytes" do
      @file.size.should == 8
    end

    platform_is_not :windows do # impossible to remove opened file on Windows
      it "returns the cached size of the file if subsequently deleted" do
        rm_r @file.path
        @file.size.should == 8
      end
    end

    it "returns the file's current size even if modified" do
      File.open(@file.path,'a') {|f| f.write '!'}
      @file.size.should == 9
    end

    it "raises an IOError on a closed file" do
      @file.close
      lambda { @file.size }.should raise_error(IOError)
    end

    platform_is_not :windows do
      it "follows symlinks if necessary" do
        ln_file = tmp('i_exist_ln')
        rm_r ln_file

        begin
          File.symlink(@file.path, ln_file).should == 0
          file = File.new(ln_file)
          file.size.should == 8
        ensure
          file.close if file && !file.closed?
          rm_r ln_file
        end
      end
    end
  end

  describe "File#size for an empty file" do
    before :each do
      @name = tmp('empty')
      touch(@name)
      @file = File.new @name
    end

    after :each do
      @file.close unless @file.closed?
      rm_r @name
    end

    it "returns 0" do
      @file.size.should == 0
    end
  end

end
