89 lines
2.6 KiB
Ruby
89 lines
2.6 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require "delegate"
|
|
|
|
module Test
|
|
module Helper
|
|
module OutputAsTTY
|
|
# This is a custom wrapper for the `output` matcher,
|
|
# used for testing output to a TTY:
|
|
#
|
|
# expect {
|
|
# print "test" if $stdout.tty?
|
|
# }.to output("test").to_stdout.as_tty
|
|
#
|
|
# expect {
|
|
# # command
|
|
# }.to output(...).to_stderr.as_tty.with_color
|
|
#
|
|
class Output < SimpleDelegator
|
|
def matches?(block)
|
|
return super(block) unless @tty
|
|
|
|
colored_tty_block = lambda do
|
|
instance_eval("$#{@output} # $stdout", __FILE__, __LINE__).extend(Module.new do
|
|
def tty?
|
|
true
|
|
end
|
|
|
|
alias_method :isatty, :tty?
|
|
end)
|
|
block.call
|
|
end
|
|
|
|
return super(colored_tty_block) if @colors
|
|
|
|
uncolored_tty_block = lambda do
|
|
instance_eval <<-EOS, __FILE__, __LINE__ + 1
|
|
begin # begin
|
|
captured_stream = StringIO.new # captured_stream = StringIO.new
|
|
|
|
original_stream = $#{@output} # original_stream = $stdout
|
|
$#{@output} = captured_stream # $stdout = captured_stream
|
|
|
|
colored_tty_block.call # colored_tty_block.call
|
|
ensure # ensure
|
|
$#{@output} = original_stream # $stdout = original_stream
|
|
$#{@output}.print Tty.strip_ansi(captured_stream.string) # $stdout.print Tty.strip_ansi(captured_stream.string)
|
|
end # end
|
|
EOS
|
|
end
|
|
|
|
super(uncolored_tty_block)
|
|
end
|
|
|
|
def to_stdout
|
|
@output = :stdout
|
|
super
|
|
self
|
|
end
|
|
|
|
def to_stderr
|
|
@output = :stderr
|
|
super
|
|
self
|
|
end
|
|
|
|
def as_tty
|
|
@tty = true
|
|
return self if [:stdout, :stderr].include?(@output)
|
|
|
|
raise "`as_tty` can only be chained to `stdout` or `stderr`."
|
|
end
|
|
|
|
def with_color
|
|
@colors = true
|
|
return self if @tty
|
|
|
|
raise "`with_color` can only be chained to `as_tty`."
|
|
end
|
|
end
|
|
|
|
def output(*args)
|
|
core_matcher = super(*args)
|
|
Output.new(core_matcher)
|
|
end
|
|
end
|
|
end
|
|
end
|