Sha256: 139821ff48687795af3b6003b247413a6ea2cc84cc744ddc6e9ffa783ba2ebc6
Contents?: true
Size: 1.18 KB
Versions: 49
Compression:
Stored size: 1.18 KB
Contents
require 'io/grab'
# Custom matcher to test text written to standard output and standard error
#
# @example
# expect { $stderr.puts "Some random error" }.to write(/Some.* error/).to(:stderr)
#
# @example
# expect { $stderr.puts "Some specific error" }.to write('Some specific error').to(:stderr)
#
# @note http://greyblake.com/blog/2012/12/14/custom-expectations-with-rspec/
RSpec::Matchers.define :write do |message|
supports_block_expectations
chain(:to) do |io|
@io = io
end
match do |block|
stream = case io
when :stdout
$stdout
when :stderr
$stderr
else
io
end
@actual = output = stream.grab &block
case message
when Hash then output.include?(JSON.pretty_generate message)
when String then output.include? message
when Regexp then output.match message
when nil then output
else fail("Allowed types for write `message` are String or Regexp, got `#{message.class}`")
end
end
description do
%Q[write #{message.inspect} to #{@io}]
end
diffable
failure_message do
%Q[expected to #{description} but got #{@actual.inspect}]
end
# default IO is standard output
def io
@io ||= :stdout
end
end
Version data entries
49 entries across 49 versions & 1 rubygems