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require 'spec_helper'
require 'mspec/guards'
require 'mspec/helpers'
RSpec.describe IOStub do
before :each do
@out = IOStub.new
@sep = $\
end
after :each do
$\ = @sep
end
it "provides a write method" do
@out.write "this"
expect(@out).to eq("this")
end
it "concatenates the arguments sent to write" do
@out.write "flim ", "flam"
expect(@out).to eq("flim flam")
end
it "provides a print method that appends the default separator" do
$\ = " [newline] "
@out.print "hello"
@out.print "world"
expect(@out).to eq("hello [newline] world [newline] ")
end
it "provides a puts method that appends the default separator" do
@out.puts "hello", 1, 2, 3
expect(@out).to eq("hello\n1\n2\n3\n")
end
it "provides a puts method that appends separator if argument not given" do
@out.puts
expect(@out).to eq("\n")
end
it "provides a printf method" do
@out.printf "%-10s, %03d, %2.1f", "test", 42, 4.2
expect(@out).to eq("test , 042, 4.2")
end
it "provides a flush method that does nothing and returns self" do
expect(@out.flush).to eq(@out)
end
end
RSpec.describe Object, "#new_fd" do
before :each do
@name = tmp("io_specs")
@io = nil
end
after :each do
@io.close if @io and not @io.closed?
rm_r @name
end
it "returns an Integer that can be used to create an IO instance" do
fd = new_fd @name
expect(fd).to be_kind_of(Integer)
@io = IO.new fd, 'w:utf-8'
@io.sync = true
@io.print "io data"
expect(IO.read(@name)).to eq("io data")
end
it "accepts an options Hash" do
allow(FeatureGuard).to receive(:enabled?).and_return(true)
fd = new_fd @name, { :mode => 'w:utf-8' }
expect(fd).to be_kind_of(Integer)
@io = IO.new fd, 'w:utf-8'
@io.sync = true
@io.print "io data"
expect(IO.read(@name)).to eq("io data")
end
it "raises an ArgumentError if the options Hash does not include :mode" do
allow(FeatureGuard).to receive(:enabled?).and_return(true)
expect { new_fd @name, { :encoding => "utf-8" } }.to raise_error(ArgumentError)
end
end
RSpec.describe Object, "#new_io" do
before :each do
@name = tmp("io_specs.txt")
end
after :each do
@io.close if @io and !@io.closed?
rm_r @name
end
it "returns a File instance" do
@io = new_io @name
expect(@io).to be_an_instance_of(File)
end
it "opens the IO for reading if passed 'r'" do
touch(@name) { |f| f.print "io data" }
@io = new_io @name, "r"
expect(@io.read).to eq("io data")
expect { @io.puts "more data" }.to raise_error(IOError)
end
it "opens the IO for writing if passed 'w'" do
@io = new_io @name, "w"
@io.sync = true
@io.print "io data"
expect(IO.read(@name)).to eq("io data")
end
it "opens the IO for reading if passed { :mode => 'r' }" do
touch(@name) { |f| f.print "io data" }
@io = new_io @name, { :mode => "r" }
expect(@io.read).to eq("io data")
expect { @io.puts "more data" }.to raise_error(IOError)
end
it "opens the IO for writing if passed { :mode => 'w' }" do
@io = new_io @name, { :mode => "w" }
@io.sync = true
@io.print "io data"
expect(IO.read(@name)).to eq("io data")
end
end
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