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require "../spec_helper"
describe IO::ARGF do
it "reads from STDIN if ARGV isn't specified" do
argv = [] of String
stdin = IO::Memory.new("hello")
argf = IO::ARGF.new argv, stdin
argf.path.should eq("-")
argf.gets_to_end.should eq("hello")
argf.read_byte.should be_nil
end
it "reads from ARGV if specified" do
path1 = datapath("argf_test_file_1.txt")
path2 = datapath("argf_test_file_2.txt")
stdin = IO::Memory.new("")
argv = [path1, path2]
argf = IO::ARGF.new argv, stdin
argf.path.should eq(path1)
argv.should eq([path1, path2])
str = argf.gets(5)
str.should eq("12345")
argv.should eq([path2])
str = argf.gets_to_end
str.should eq("\n67890\n")
argv.should be_empty
argf.read_byte.should be_nil
argv << path1
str = argf.gets(5)
str.should eq("12345")
end
it "reads when is more data left to read" do
argf = IO::ARGF.new [datapath("argf_test_file_3.xml")], IO::Memory.new
argf.read(Bytes.new(4))
buf = Bytes.new(4096)
z = argf.read(buf)
z = argf.read(buf)
z = argf.read(buf)
z = argf.read(buf)
z.should_not eq 0
String.new(buf[0...z]).should_not be_empty
end
describe "gets" do
it "reads from STDIN if ARGV isn't specified" do
argv = [] of String
stdin = IO::Memory.new("hello\nworld\n")
argf = IO::ARGF.new argv, stdin
argf.gets.should eq("hello")
argf.gets.should eq("world")
argf.gets.should be_nil
end
it "reads from STDIN if ARGV isn't specified, chomp = false" do
argv = [] of String
stdin = IO::Memory.new("hello\nworld\n")
argf = IO::ARGF.new argv, stdin
argf.gets(chomp: false).should eq("hello\n")
argf.gets(chomp: false).should eq("world\n")
argf.gets(chomp: false).should be_nil
end
it "reads from ARGV if specified" do
path1 = datapath("argf_test_file_1.txt")
path2 = datapath("argf_test_file_2.txt")
stdin = IO::Memory.new("")
argv = [path1, path2]
argf = IO::ARGF.new argv, stdin
argv.should eq([path1, path2])
argf.gets(chomp: false).should eq("12345\n")
argv.should eq([path2])
argf.gets(chomp: false).should eq("67890\n")
argv.should be_empty
argf.gets(chomp: false).should be_nil
argv << path1
str = argf.gets(chomp: false)
str.should eq("12345\n")
end
end
describe "peek" do
it "peeks from STDIN if ARGV isn't specified" do
argv = [] of String
stdin = IO::Memory.new("1234")
argf = IO::ARGF.new argv, stdin
argf.peek.should eq("1234".to_slice)
argf.gets_to_end.should eq("1234")
end
it "peeks from ARGV if specified" do
path1 = datapath("argf_test_file_1.txt")
path2 = datapath("argf_test_file_2.txt")
stdin = IO::Memory.new("")
argv = [path1, path2]
argf = IO::ARGF.new argv, stdin
argf.peek.should eq("12345\n".to_slice)
argf.read_string(6)
argf.read_byte
argf.peek.should eq("7890\n".to_slice)
end
end
end
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