require 'test_helper'

module Vedeu

  module Output

    describe Wordwrap do

      let(:described) { Vedeu::Output::Wordwrap }
      let(:instance)  { described.new(text, options) }
      let(:text)      { '' }
      let(:options)   {
        {
          ellipsis: '...',
          mode:     mode,
          width:    width,
        }
      }
      let(:mode)      { :default }
      let(:width)     { 30 }

      let(:text_line) {
        "Krypton (from Greek: κρυπτός kryptos 'the hidden one')."
      }
      let(:text_block) {
        "Krypton (from Greek: κρυπτός kryptos 'the hidden one') is a " \
        "chemical element with symbol Kr and atomic number 36. It is a " \
        'member of group 18 (noble gases) elements.'
      }
      let(:text_newlines) {
        "Krypton is a colorless, odorless, tasteless noble gas.\n"            \
        "It occurs in trace amounts in the atmosphere.\n"                     \
        "It is isolated by fractionally distilling liquefied air.\n"          \
        "Krypton is often used with other rare gases in fluorescent lamps.\n"
      }
      let(:text_blanklines) {
        "Krypton (from Greek: κρυπτός kryptos 'the hidden one').\n\n"     \
        "It is a chemical element with symbol Kr and atomic number 36.\n" \
        "It is a member of group 18 (noble gases) elements.\n\n"          \
        '-- Wikipedia'
      }
      let(:text_line_objects) {
        [
          Vedeu::Views::Line.new(value: [
            Vedeu::Views::Stream.new(
              value: 'Krypton is a colorless, odorless, tasteless noble gas.'
            )]),
          Vedeu::Views::Line.new(value: [
            Vedeu::Views::Stream.new(
              value: 'It occurs in trace amounts in the atmosphere.'
            )]),
          Vedeu::Views::Line.new(value: [
            Vedeu::Views::Stream.new(
              value: 'It is isolated by fractionally distilling liquefied air.'
            )]),
          Vedeu::Views::Line.new(value: [
            Vedeu::Views::Stream.new(
              value: 'Krypton is often used with other rare gases in ' \
                     'fluorescent lamps.'
            )])
        ]
      }

      describe '#initialize' do
        it { instance.must_be_instance_of(described) }
        it { instance.instance_variable_get('@text').must_equal(text) }
        it { instance.instance_variable_get('@options').must_equal(options) }
      end

      describe '#content' do
        it { instance.must_respond_to(:content) }
      end

      describe '#prune' do
        let(:text) { text_line }

        subject { instance.prune }

        context 'when the text is <= the pruning width' do
          let(:width) { 80 }

          it { subject.must_be_instance_of(String) }

          it { subject.must_equal(
            "Krypton (from Greek: κρυπτός kryptos 'the hidden one')."
          ) }
        end

        context 'when the text is > the pruning width' do
          context 'with a single line of text' do
            it { subject.must_equal('Krypton (from Greek: κρυπτός...') }
          end

          context 'with a text block' do
            let(:text) { text_block }

            it { subject.must_equal('Krypton (from Greek: κρυπτός...') }
          end

          context 'with a text block containing newlines' do
            let(:text) { text_newlines }

            it { subject.must_equal([
                'Krypton is a colorless, odor...',
                'It occurs in trace amounts i...',
                'It is isolated by fractional...',
                'Krypton is often used with o...'
              ])
            }
          end

          context 'with a text block containing newlines and blank lines' do
            let(:text) { text_blanklines }

            it { subject.must_equal([
              'Krypton (from Greek: κρυπτός...',
              '',
              'It is a chemical element wit...',
              'It is a member of group 18 (...',
              '',
              '-- Wikipedia...'
              ])
            }
          end
        end
      end

      describe '#wrap' do
        subject { instance.wrap }

        context 'with a single line of text' do
          let(:text) { text_line }

          it { subject.must_equal([
              'Krypton (from Greek: κρυπτός',
              "kryptos 'the hidden one')."
            ])
          }
        end

        context 'with a text block' do
          let(:text) { text_block }

          it { subject.must_equal([
            'Krypton (from Greek: κρυπτός',
            "kryptos 'the hidden one') is",
            'a chemical element with',
            'symbol Kr and atomic number',
            '36. It is a member of group',
            '18 (noble gases) elements.'
            ])
          }
        end

        context 'with a text block containing newlines' do
          let(:text) { text_newlines }

          it { subject.must_equal([
            'Krypton is a colorless,',
            'odorless, tasteless noble',
            'gas.',
            'It occurs in trace amounts',
            'in the atmosphere.',
            'It is isolated by',
            'fractionally distilling',
            'liquefied air.',
            'Krypton is often used with',
            'other rare gases in',
            'fluorescent lamps.'
            ])
          }
        end

        context 'with a text block containing newlines and blank lines' do
          let(:text) { text_blanklines }

          it { subject.must_equal([
            'Krypton (from Greek: κρυπτός',
            "kryptos 'the hidden one').",
            '',
            'It is a chemical element',
            'with symbol Kr and atomic',
            'number 36.',
            'It is a member of group 18',
            '(noble gases) elements.',
            '',
            '-- Wikipedia'
            ])
          }
        end
      end

      describe '.for' do
        subject { described.for(text, options) }

        it { subject.must_be_instance_of(Vedeu::Views::Lines) }

        context 'with a single line of text' do
          let(:text) { text_line }

          it { subject.size.must_equal(1) }
        end

        context 'with a text block' do
          let(:text) { text_block }

          it { subject.size.must_equal(1) }
        end

        context 'with a text block containing newlines' do
          let(:text) { text_newlines }

          it { subject.size.must_equal(4) }
        end

        context 'with a text block containing newlines and blank lines' do
          let(:text) { text_blanklines }

          it { subject.size.must_equal(6) }
        end

        context 'when mode: :prune' do
          let(:mode) { :prune }

          context 'with a single line of text' do
            let(:text) { text_line }

            it { subject.size.must_equal(1) }
          end

          context 'with a text block' do
            let(:text) { text_block }

            it { subject.size.must_equal(1) }
          end

          context 'with a text block containing newlines' do
            let(:text) { text_newlines }

            it { subject.size.must_equal(4) }
          end

          context 'with a text block containing newlines and blank lines' do
            let(:text) { text_blanklines }

            it { subject.size.must_equal(6) }
          end
        end

        context 'when mode: :wrap' do
          let(:mode) { :wrap }

          context 'with a single line of text' do
            let(:text) { text_line }

            it { subject.size.must_equal(2) }
          end

          context 'with a text block' do
            let(:text) { text_block }

            it { subject.size.must_equal(6) }
          end

          context 'with a text block containing newlines' do
            let(:text) { text_newlines }

            it { subject.size.must_equal(11) }
          end

          context 'with a text block containing newlines and blank lines' do
            let(:text) { text_blanklines }

            it { subject.size.must_equal(10) }
          end
        end
      end

    end # Wordwrap

  end # Output

end # Vedeu