require 'spec_helper'

class ClassMixedWithDSLAssertions
  include Beaker::DSL::Assertions
end

describe ClassMixedWithDSLAssertions do
  describe '#assert_output' do
    it 'defaults to checking stdout' do
      stdout = <<~CONSOLE
        This should not have space infront of it
          While this should have two spaces infront of it
            And this 3, all lines should be to stdout
      CONSOLE

      expectation = <<CONSOLE
        This should not have space infront of it
          While this should have two spaces infront of it
            And this 3, all lines should be to stdout
CONSOLE

      result = double
      expect(result).to receive(:nil?).at_least(:once).and_return(false)
      expect(result).to receive(:stdout).and_return(stdout)
      expect(result).to receive(:output).and_return(stdout)
      expect(result).to receive(:stderr).and_return('')

      expect(subject).to receive(:result).at_least(:once).and_return(result)
      expect { subject.assert_output expectation }.not_to raise_error
    end

    it 'allows specifying stream markers' do
      output = <<~OUTPUT
        This is on stdout
        While this is on stderr
        And THIS is again on stdout
      OUTPUT

      stdout = <<~STDOUT
        This is on stdout
        And THIS is again on stdout
      STDOUT

      stderr = <<~STDERR
        While this is on stderr
      STDERR

      expectation = <<EXPECT
        STDOUT> This is on stdout
        STDERR> While this is on stderr
        STDOUT> And THIS is again on stdout
EXPECT

      result = double
      expect(result).to receive(:nil?).at_least(:once).and_return(false)
      expect(result).to receive(:stdout).and_return(stdout)
      expect(result).to receive(:output).and_return(output)
      expect(result).to receive(:stderr).and_return(stderr)

      expect(subject).to receive(:result).at_least(:once).and_return(result)
      expect { subject.assert_output expectation }.not_to raise_error
    end

    it 'raises an approriate error when output does not match expectations' do
      FakeFS.without do
        output = <<~OUTPUT
          This is on stdout
          Holy Crap, what HAPPENED!?!?!?
          And THIS is again on stdout
        OUTPUT

        expectation = <<EXPECT
        STDOUT> This is on stdout
        STDERR> While this is on stderr
        STDOUT> And THIS is again on stdout
EXPECT
        result = double
        expect(result).to receive(:nil?).at_least(:once).and_return(false)
        expect(result).to receive(:output).and_return(output)

        expect(subject).to receive(:result).at_least(:once).and_return(result)
        expect { subject.assert_output expectation }.to raise_error(Minitest::Assertion)
      end
    end
  end
end