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require_relative '../../spec_helper'
require_relative 'shared/read'
describe "ARGF.readpartial" do
it_behaves_like :argf_read, :readpartial
before :each do
@file1_name = fixture __FILE__, "file1.txt"
@file2_name = fixture __FILE__, "file2.txt"
@stdin_name = fixture __FILE__, "stdin.txt"
@file1 = File.read @file1_name
@file2 = File.read @file2_name
@stdin = File.read @stdin_name
end
it "raises an ArgumentError if called without a maximum read length" do
argf [@file1_name] do
lambda { @argf.readpartial }.should raise_error(ArgumentError)
end
end
it "reads maximum number of bytes from one file at a time" do
argf [@file1_name, @file2_name] do
len = @file1.size + @file2.size
@argf.readpartial(len).should == @file1
end
end
it "clears output buffer even if EOFError is raised because @argf is at end" do
begin
output = "to be cleared"
argf [@file1_name] do
@argf.read
@argf.readpartial(1, output)
end
rescue EOFError
output.should == ""
end
end
it "reads maximum number of bytes from one file at a time" do
argf [@file1_name, @file2_name] do
len = @file1.size + @file2.size
@argf.readpartial(len).should == @file1
end
end
it "returns an empty string if EOFError is raised while reading any but the last file" do
argf [@file1_name, @file2_name] do
@argf.readpartial(@file1.size)
@argf.readpartial(1).should == ""
end
end
it "raises an EOFError if the exception was raised while reading the last file" do
argf [@file1_name, @file2_name] do
@argf.readpartial(@file1.size)
@argf.readpartial(1)
@argf.readpartial(@file2.size)
lambda { @argf.readpartial(1) }.should raise_error(EOFError)
lambda { @argf.readpartial(1) }.should raise_error(EOFError)
end
end
it "raises an EOFError if the exception was raised while reading STDIN" do
ruby_str = <<-STR
print ARGF.readpartial(#{@stdin.size})
ARGF.readpartial(1) rescue print $!.class
STR
stdin = ruby_exe(ruby_str, args: "< #{@stdin_name}", escape: true)
stdin.should == @stdin + "EOFError"
end
end
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