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require 'spec_helper'
require 'mspec/expectations/expectations'
require 'mspec/matchers'
RSpec.describe OutputToFDMatcher do
# Figure out how in the hell to achieve this
it "matches when running the block produces the expected output to the given FD" do
expect(OutputToFDMatcher.new("Hi\n", STDERR).matches?(lambda { $stderr.print "Hi\n" })).to eq(true)
end
it "does not match if running the block does not produce the expected output to the FD" do
expect(OutputToFDMatcher.new("Hi\n", STDERR).matches?(lambda { $stderr.puts("Hello\n") })).to eq(false)
end
it "propagate the exception if one is thrown while matching" do
exc = RuntimeError.new("propagates")
expect {
expect(OutputToFDMatcher.new("Hi\n", STDERR).matches?(lambda {
raise exc
})).to eq(false)
}.to raise_error(exc)
end
it "defaults to matching against STDOUT" do
object = Object.new
object.extend MSpecMatchers
expect(object.send(:output_to_fd, "Hi\n").matches?(lambda { $stdout.print "Hi\n" })).to eq(true)
end
it "accepts any IO instance" do
io = IO.new STDOUT.fileno
expect(OutputToFDMatcher.new("Hi\n", io).matches?(lambda { io.print "Hi\n" })).to eq(true)
end
it "allows matching with a Regexp" do
s = "Hi there\n"
expect(OutputToFDMatcher.new(/Hi/, STDERR).matches?(lambda { $stderr.print s })).to eq(true)
expect(OutputToFDMatcher.new(/Hi?/, STDERR).matches?(lambda { $stderr.print s })).to eq(true)
expect(OutputToFDMatcher.new(/[hH]i?/, STDERR).matches?(lambda { $stderr.print s })).to eq(true)
expect(OutputToFDMatcher.new(/.*/, STDERR).matches?(lambda { $stderr.print s })).to eq(true)
expect(OutputToFDMatcher.new(/H.*?here/, STDERR).matches?(lambda { $stderr.print s })).to eq(true)
expect(OutputToFDMatcher.new(/Ahoy/, STDERR).matches?(lambda { $stderr.print s })).to eq(false)
end
end
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