require 'spec_helper'

RSpec.shared_examples_for 'DBF' do
  let(:header_record_length) { table.instance_eval { header.record_length } }
  let(:sum_of_column_lengths) { table.columns.inject(1) { |sum, column| sum + column.length } }

  specify 'sum of column lengths should equal record length specified in header plus one' do
    expect(header_record_length).to eq sum_of_column_lengths
  end

  specify 'records should be instances of DBF::Record' do
    expect(table).to all be_kind_of(DBF::Record)
  end

  specify 'record count should be the same as reported in the header' do
    expect(table.entries.size).to eq table.record_count
  end

  specify 'column names should not be blank' do
    table.columns.each do |column|
      expect(column.name).to_not be_empty
    end
  end

  specify 'column types should be valid' do
    valid_column_types = %w[C N L D M F B G P Y T I V X @ O + 0]
    table.columns.each do |column|
      expect(valid_column_types).to include(column.type)
    end
  end

  specify 'column lengths should be instances of Integer' do
    table.columns.each do |column|
      expect(column.length).to be_kind_of(Integer)
    end
  end

  specify 'column lengths should be larger than 0' do
    table.columns.each do |column|
      expect(column.length).to be > 0
    end
  end

  specify 'column decimals should be instances of Integer' do
    table.columns.each do |column|
      expect(column.decimal).to be_kind_of(Integer)
    end
  end
end

RSpec.describe DBF, 'of type 02 (FoxBase)' do
  let(:table) { DBF::Table.new fixture('dbase_02.dbf') }

  it_behaves_like 'DBF'

  it 'reports the correct version number' do
    expect(table.version).to eq '02'
  end

  it 'reports the correct version description' do
    expect(table.version_description).to eq 'FoxBase'
  end

  it 'determines the number of records' do
    expect(table.record_count).to eq 9
  end
end

RSpec.describe DBF, 'of type 03 (dBase III without memo file)' do
  let(:table) { DBF::Table.new fixture('dbase_03.dbf') }

  it_behaves_like 'DBF'

  it 'reports the correct version number' do
    expect(table.version).to eq '03'
  end

  it 'reports the correct version description' do
    expect(table.version_description).to eq 'dBase III without memo file'
  end

  it 'determines the number of records' do
    expect(table.record_count).to eq 14
  end
end

RSpec.describe DBF, 'of type 30 (Visual FoxPro)' do
  let(:table) { DBF::Table.new fixture('dbase_30.dbf') }

  it_behaves_like 'DBF'

  it 'reports the correct version number' do
    expect(table.version).to eq '30'
  end

  it 'reports the correct version description' do
    expect(table.version_description).to eq 'Visual FoxPro'
  end

  it 'determines the number of records' do
    expect(table.record_count).to eq 34
  end

  it 'reads memo data' do
    expect(table.record(3).classes).to match(/\AAgriculture.*Farming\r\n\Z/m)
  end
end

RSpec.describe DBF, 'of type 31 (Visual FoxPro with AutoIncrement field)' do
  let(:table) { DBF::Table.new fixture('dbase_31.dbf') }

  it_behaves_like 'DBF'

  it 'has a dBase version of 31' do
    expect(table.version).to eq '31'
  end

  it 'reports the correct version description' do
    expect(table.version_description).to eq 'Visual FoxPro with AutoIncrement field'
  end

  it 'determines the number of records' do
    expect(table.record_count).to eq 77
  end
end

RSpec.describe DBF, 'of type 32 (Visual FoxPro with field type Varchar or Varbinary)' do
  let(:table) { DBF::Table.new fixture('dbase_32.dbf') }

  it_behaves_like 'DBF'

  it 'has a dBase version of 32' do
    expect(table.version).to eq '32'
  end

  it 'reports the correct version description' do
    expect(table.version_description).to eq 'Visual FoxPro with field type Varchar or Varbinary'
  end

  it 'determines the number of records' do
    expect(table.record_count).to eq 1
  end
end

RSpec.describe DBF, 'of type 83 (dBase III with memo file)' do
  let(:table) { DBF::Table.new fixture('dbase_83.dbf') }

  it_behaves_like 'DBF'

  it 'reports the correct version number' do
    expect(table.version).to eq '83'
  end

  it 'reports the correct version description' do
    expect(table.version_description).to eq 'dBase III with memo file'
  end

  it 'determines the number of records' do
    expect(table.record_count).to eq 67
  end
end

RSpec.describe DBF, 'of type 8b (dBase IV with memo file)' do
  let(:table) { DBF::Table.new fixture('dbase_8b.dbf') }

  it_behaves_like 'DBF'

  it 'reports the correct version number' do
    expect(table.version).to eq '8b'
  end

  it 'reports the correct version description' do
    expect(table.version_description).to eq 'dBase IV with memo file'
  end

  it 'determines the number of records' do
    expect(table.record_count).to eq 10
  end
end

RSpec.describe DBF, 'of type 8c (unknown)' do
  let(:table) { DBF::Table.new fixture('dbase_8c.dbf') }

  it_behaves_like 'DBF'

  it 'reports the correct version number' do
    expect(table.version).to eq '8c'
  end

  it 'reports the correct version description' do
    expect(table.version_description).to eq 'dBase 7'
  end

  it 'determines the number of records' do
    expect(table.record_count).to eq 10
  end
end

RSpec.describe DBF, 'of type f5 (FoxPro with memo file)' do
  let(:table) { DBF::Table.new fixture('dbase_f5.dbf') }

  it_behaves_like 'DBF'

  it 'reports the correct version number' do
    expect(table.version).to eq 'f5'
  end

  it 'reports the correct version description' do
    expect(table.version_description).to eq 'FoxPro with memo file'
  end

  it 'determines the number of records' do
    expect(table.record_count).to eq 975
  end

  it 'reads memo data' do
    expect(table.record(3).datn.to_s).to eq '1870-06-30'
  end
end