/test/csv/test_table.rb

# -*- coding: utf-8 -*-
# frozen_string_literal: false

require_relative "helper"

class TestCSVTable < Test::Unit::TestCase
  extend DifferentOFS

  def setup
    super
    @rows  = [ CSV::Row.new(%w{A B C}, [1, 2, 3]),
               CSV::Row.new(%w{A B C}, [4, 5, 6]),
               CSV::Row.new(%w{A B C}, [7, 8, 9]) ]
    @table = CSV::Table.new(@rows)

    @header_table = CSV::Table.new(
      [CSV::Row.new(%w{A B C}, %w{A B C}, true)] + @rows
    )
    
    @header_only_table = CSV::Table.new([], headers: %w{A B C})
  end

  def test_initialze
    assert_not_nil(@table)
    assert_instance_of(CSV::Table, @table)
  end

  def test_modes
    assert_equal(:col_or_row, @table.mode)

    # non-destructive changes, intended for one shot calls
    cols = @table.by_col
    assert_equal(:col_or_row, @table.mode)
    assert_equal(:col, cols.mode)
    assert_equal(@table, cols)

    rows = @table.by_row
    assert_equal(:col_or_row, @table.mode)
    assert_equal(:row, rows.mode)
    assert_equal(@table, rows)

    col_or_row = rows.by_col_or_row
    assert_equal(:row, rows.mode)
    assert_equal(:col_or_row, col_or_row.mode)
    assert_equal(@table, col_or_row)

    # destructive mode changing calls
    assert_equal(@table, @table.by_row!)
    assert_equal(:row, @table.mode)
    assert_equal(@table, @table.by_col_or_row!)
    assert_equal(:col_or_row, @table.mode)
  end

  def test_headers
    assert_equal(@rows.first.headers, @table.headers)
  end

  def test_headers_empty
    t = CSV::Table.new([])
    assert_equal Array.new, t.headers
  end

  def test_headers_only
    assert_equal(%w[A B C], @header_only_table.headers)
  end

  def test_headers_modified_by_row
    table = CSV::Table.new([], headers: ["A", "B"])
    table << ["a", "b"]
    table.first << {"C" => "c"}
    assert_equal(["A", "B", "C"], table.headers)
  end

  def test_index
    ##################
    ### Mixed Mode ###
    ##################
    # by row
    @rows.each_index { |i| assert_equal(@rows[i], @table[i]) }
    assert_equal(nil, @table[100])  # empty row

    # by row with Range
    assert_equal([@table[1], @table[2]], @table[1..2])

    # by col
    @rows.first.headers.each do |header|
      assert_equal(@rows.map { |row| row[header] }, @table[header])
    end
    assert_equal([nil] * @rows.size, @table["Z"])  # empty col

    # by cell, row then col
    assert_equal(2, @table[0][1])
    assert_equal(6, @table[1]["C"])

    # by cell, col then row
    assert_equal(5, @table["B"][1])
    assert_equal(9, @table["C"][2])

    # with headers (by col)
    assert_equal(["B", 2, 5, 8], @header_table["B"])

    ###################
    ### Column Mode ###
    ###################
    @table.by_col!

    assert_equal([2, 5, 8], @table[1])
    assert_equal([2, 5, 8], @table["B"])

    ################
    ### Row Mode ###
    ################
    @table.by_row!

    assert_equal(@rows[1], @table[1])
    assert_raise(TypeError) { @table["B"] }

    ############################
    ### One Shot Mode Change ###
    ############################
    assert_equal(@rows[1], @table[1])
    assert_equal([2, 5, 8], @table.by_col[1])
    assert_equal(@rows[1], @table[1])
  end

  def test_set_row_or_column
    ##################
    ### Mixed Mode ###
    ##################
    # set row
    @table[2] = [10, 11, 12]
    assert_equal([%w[A B C], [1, 2, 3], [4, 5, 6], [10, 11, 12]], @table.to_a)

    @table[3] = CSV::Row.new(%w[A B C], [13, 14, 15])
    assert_equal( [%w[A B C], [1, 2, 3], [4, 5, 6], [10, 11, 12], [13, 14, 15]],
                  @table.to_a )

    # set col
    @table["Type"] = "data"
    assert_equal( [ %w[A B C Type],
                    [1, 2, 3, "data"],
                    [4, 5, 6, "data"],
                    [10, 11, 12, "data"],
                    [13, 14, 15, "data"] ],
                  @table.to_a )

    @table["Index"] = [1, 2, 3]
    assert_equal( [ %w[A B C Type Index],
                    [1, 2, 3, "data", 1],
                    [4, 5, 6, "data", 2],
                    [10, 11, 12, "data", 3],
                    [13, 14, 15, "data", nil] ],
                  @table.to_a )

    @table["B"] = [100, 200]
    assert_equal( [ %w[A B C Type Index],
                    [1, 100, 3, "data", 1],
                    [4, 200, 6, "data", 2],
                    [10, nil, 12, "data", 3],
                    [13, nil, 15, "data", nil] ],
                  @table.to_a )

    # verify resulting table
    assert_equal(<<-CSV, @table.to_csv)
A,B,C,Type,Index
1,100,3,data,1
4,200,6,data,2
10,,12,data,3
13,,15,data,
    CSV

    # with headers
    @header_table["Type"] = "data"
    assert_equal(%w[Type data data data], @header_table["Type"])

    ###################
    ### Column Mode ###
    ###################
    @table.by_col!

    @table[1] = [2, 5, 11, 14]
    assert_equal( [ %w[A B C Type Index],
                    [1, 2, 3, "data", 1],
                    [4, 5, 6, "data", 2],
                    [10, 11, 12, "data", 3],
                    [13, 14, 15, "data", nil] ],
                  @table.to_a )

    @table["Extra"] = "new stuff"
    assert_equal( [ %w[A B C Type Index Extra],
                    [1, 2, 3, "data", 1, "new stuff"],
                    [4, 5, 6, "data", 2, "new stuff"],
                    [10, 11, 12, "data", 3, "new stuff"],
                    [13, 14, 15, "data", nil, "new stuff"] ],
                  @table.to_a )

    ################
    ### Row Mode ###
    ################
    @table.by_row!

    @table[1] = (1..6).to_a
    assert_equal( [ %w[A B C Type Index Extra],
                    [1, 2, 3, "data", 1, "new stuff"],
                    [1, 2, 3, 4, 5, 6],
                    [10, 11, 12, "data", 3, "new stuff"],
                    [13, 14, 15, "data", nil, "new stuff"] ],
                  @table.to_a )

    assert_raise(TypeError) { @table["Extra"] = nil }
  end

  def test_set_by_col_with_header_row
    r  = [ CSV::Row.new(%w{X Y Z}, [97, 98, 99], true) ]
    t = CSV::Table.new(r)
    t.by_col!
    t['A'] = [42]
    assert_equal(['A'], t['A'])
  end

  def test_each
    ######################
    ### Mixed/Row Mode ###
    ######################
    i = 0
    @table.each do |row|
      assert_equal(@rows[i], row)
      i += 1
    end

    # verify that we can chain the call
    assert_equal(@table, @table.each { })

    # without block
    enum = @table.each
    assert_instance_of(Enumerator, enum)
    assert_equal(@table.size, enum.size)

    i = 0
    enum.each do |row|
      assert_equal(@rows[i], row)
      i += 1
    end

    ###################
    ### Column Mode ###
    ###################
    @table.by_col!

    headers = @table.headers
    @table.each do |header, column|
      assert_equal(headers.shift, header)
      assert_equal(@table[header], column)
    end

    # without block
    enum = @table.each
    assert_instance_of(Enumerator, enum)
    assert_equal(@table.headers.size, enum.size)

    headers = @table.headers
    enum.each do |header, column|
      assert_equal(headers.shift, header)
      assert_equal(@table[header], column)
    end

    ############################
    ### One Shot Mode Change ###
    ############################
    @table.by_col_or_row!

    @table.each { |row| assert_instance_of(CSV::Row, row) }
    @table.by_col.each { |tuple| assert_instance_of(Array, tuple) }
    @table.each { |row| assert_instance_of(CSV::Row, row) }
  end

  def test_each_split
    yielded_values = []
    @table.each do |column1, column2, column3|
      yielded_values << [column1, column2, column3]
    end
    assert_equal(@rows.collect(&:to_a),
                 yielded_values)
  end

  def test_enumerable
    assert_equal( @rows.values_at(0, 2),
                  @table.select { |row| (row["B"] % 2).zero? } )

    assert_equal(@rows[1], @table.find { |row| row["C"] > 5 })
  end

  def test_to_a
    assert_equal([%w[A B C], [1, 2, 3], [4, 5, 6], [7, 8, 9]], @table.to_a)

    # with headers
    assert_equal( [%w[A B C], [1, 2, 3], [4, 5, 6], [7, 8, 9]],
                  @header_table.to_a )
  end

  def test_to_csv
    csv = <<-CSV
A,B,C
1,2,3
4,5,6
7,8,9
    CSV

    # normal conversion
    assert_equal(csv, @table.to_csv)
    assert_equal(csv, @table.to_s)  # alias

    # with options
    assert_equal( csv.gsub(",", "|").gsub("\n", "\r\n"),
                  @table.to_csv(col_sep: "|", row_sep: "\r\n") )
    assert_equal( csv.lines.to_a[1..-1].join(''),
                  @table.to_csv(:write_headers => false) )

    # with headers
    assert_equal(csv, @header_table.to_csv)
  end

  def test_append
    # verify that we can chain the call
    assert_equal(@table, @table << [10, 11, 12])

    # Array append
    assert_equal(CSV::Row.new(%w[A B C], [10, 11, 12]), @table[-1])

    # Row append
    assert_equal(@table, @table << CSV::Row.new(%w[A B C], [13, 14, 15]))
    assert_equal(CSV::Row.new(%w[A B C], [13, 14, 15]), @table[-1])
  end

  def test_delete_mixed_one
    ##################
    ### Mixed Mode ###
    ##################
    # delete a row
    assert_equal(@rows[1], @table.delete(1))

    # delete a col
    assert_equal(@rows.map { |row| row["A"] }, @table.delete("A"))

    # verify resulting table
    assert_equal(<<-CSV, @table.to_csv)
B,C
2,3
8,9
    CSV
  end

  def test_delete_mixed_multiple
    ##################
    ### Mixed Mode ###
    ##################
    # delete row and col
    second_row = @rows[1]
    a_col = @rows.map { |row| row["A"] }
    a_col_without_second_row = a_col[0..0] + a_col[2..-1]
    assert_equal([
                   second_row,
                   a_col_without_second_row,
                 ],
                 @table.delete(1, "A"))

    # verify resulting table
    assert_equal(<<-CSV, @table.to_csv)
B,C
2,3
8,9
    CSV
  end

  def test_delete_column
    ###################
    ### Column Mode ###
    ###################
    @table.by_col!

    assert_equal(@rows.map { |row| row[0] }, @table.delete(0))
    assert_equal(@rows.map { |row| row["C"] }, @table.delete("C"))

    # verify resulting table
    assert_equal(<<-CSV, @table.to_csv)
B
2
5
8
    CSV
  end

  def test_delete_row
    ################
    ### Row Mode ###
    ################
    @table.by_row!

    assert_equal(@rows[1], @table.delete(1))
    assert_raise(TypeError) { @table.delete("C") }

    # verify resulting table
    assert_equal(<<-CSV, @table.to_csv)
A,B,C
1,2,3
7,8,9
    CSV
  end

  def test_delete_with_blank_rows
    data = "col1,col2\nra1,ra2\n\nrb1,rb2"
    table = CSV.parse(data, :headers => true)
    assert_equal(["ra2", nil, "rb2"], table.delete("col2"))
  end

  def test_delete_if_row
    ######################
    ### Mixed/Row Mode ###
    ######################
    # verify that we can chain the call
    assert_equal(@table, @table.delete_if { |row| (row["B"] % 2).zero? })

    # verify resulting table
    assert_equal(<<-CSV, @table.to_csv)
A,B,C
4,5,6
    CSV
  end

  def test_delete_if_row_without_block
    ######################
    ### Mixed/Row Mode ###
    ######################
    enum = @table.delete_if
    assert_instance_of(Enumerator, enum)
    assert_equal(@table.size, enum.size)

    # verify that we can chain the call
    assert_equal(@table, enum.each { |row| (row["B"] % 2).zero? })

    # verify resulting table
    assert_equal(<<-CSV, @table.to_csv)
A,B,C
4,5,6
    CSV
  end

  def test_delete_if_column
    ###################
    ### Column Mode ###
    ###################
    @table.by_col!

    assert_equal(@table, @table.delete_if { |h, v| h > "A" })
    assert_equal(<<-CSV, @table.to_csv)
A
1
4
7
    CSV
  end

  def test_delete_if_column_without_block
    ###################
    ### Column Mode ###
    ###################
    @table.by_col!

    enum = @table.delete_if
    assert_instance_of(Enumerator, enum)
    assert_equal(@table.headers.size, enum.size)

    assert_equal(@table, enum.each { |h, v| h > "A" })
    assert_equal(<<-CSV, @table.to_csv)
A
1
4
7
    CSV
  end

  def test_delete_headers_only
    ###################
    ### Column Mode ###
    ###################
    @header_only_table.by_col!

    # delete by index
    assert_equal([], @header_only_table.delete(0))
    assert_equal(%w[B C], @header_only_table.headers)

    # delete by header
    assert_equal([], @header_only_table.delete("C"))
    assert_equal(%w[B], @header_only_table.headers)
  end

  def test_values_at
    ##################
    ### Mixed Mode ###
    ##################
    # rows
    assert_equal(@rows.values_at(0, 2), @table.values_at(0, 2))
    assert_equal(@rows.values_at(1..2), @table.values_at(1..2))

    # cols
    assert_equal([[1, 3], [4, 6], [7, 9]], @table.values_at("A", "C"))
    assert_equal([[2, 3], [5, 6], [8, 9]], @table.values_at("B".."C"))

    ###################
    ### Column Mode ###
    ###################
    @table.by_col!

    assert_equal([[1, 3], [4, 6], [7, 9]], @table.values_at(0, 2))
    assert_equal([[1, 3], [4, 6], [7, 9]], @table.values_at("A", "C"))

    ################
    ### Row Mode ###
    ################
    @table.by_row!

    assert_equal(@rows.values_at(0, 2), @table.values_at(0, 2))
    assert_raise(TypeError) { @table.values_at("A", "C") }

    ############################
    ### One Shot Mode Change ###
    ############################
    assert_equal(@rows.values_at(0, 2), @table.values_at(0, 2))
    assert_equal([[1, 3], [4, 6], [7, 9]], @table.by_col.values_at(0, 2))
    assert_equal(@rows.values_at(0, 2), @table.values_at(0, 2))
  end

  def test_array_delegation
    assert_not_empty(@table, "Table was empty.")

    assert_equal(@rows.size, @table.size)
  end

  def test_inspect_shows_current_mode
    str = @table.inspect
    assert_include(str, "mode:#{@table.mode}", "Mode not shown.")

    @table.by_col!
    str = @table.inspect
    assert_include(str, "mode:#{@table.mode}", "Mode not shown.")
  end

  def test_inspect_encoding_is_ascii_compatible
    assert_send([Encoding, :compatible?,
                 Encoding.find("US-ASCII"),
                 @table.inspect.encoding],
            "inspect() was not ASCII compatible." )
  end

  def test_dig_mixed
    # by row
    assert_equal(@rows[0], @table.dig(0))
    assert_nil(@table.dig(100))  # empty row

    # by col
    assert_equal([2, 5, 8], @table.dig("B"))
    assert_equal([nil] * @rows.size, @table.dig("Z"))  # empty col

    # by row then col
    assert_equal(2, @table.dig(0, 1))
    assert_equal(6, @table.dig(1, "C"))

    # by col then row
    assert_equal(5, @table.dig("B", 1))
    assert_equal(9, @table.dig("C", 2))
  end

  def test_dig_by_column
    @table.by_col!

    assert_equal([2, 5, 8], @table.dig(1))
    assert_equal([2, 5, 8], @table.dig("B"))

    # by col then row
    assert_equal(5, @table.dig("B", 1))
    assert_equal(9, @table.dig("C", 2))
  end

  def test_dig_by_row
    @table.by_row!

    assert_equal(@rows[1], @table.dig(1))
    assert_raise(TypeError) { @table.dig("B") }

    # by row then col
    assert_equal(2, @table.dig(0, 1))
    assert_equal(6, @table.dig(1, "C"))
  end

  def test_dig_cell
    table = CSV::Table.new([CSV::Row.new(["A"], [["foo", ["bar", ["baz"]]]])])

    # by row, col then cell
    assert_equal("foo", table.dig(0, "A", 0))
    assert_equal(["baz"], table.dig(0, "A", 1, 1))

    # by col, row then cell
    assert_equal("foo", table.dig("A", 0, 0))
    assert_equal(["baz"], table.dig("A", 0, 1, 1))
  end

  def test_dig_cell_no_dig
    table = CSV::Table.new([CSV::Row.new(["A"], ["foo"])])

    # by row, col then cell
    assert_raise(TypeError) do
      table.dig(0, "A", 0)
    end

    # by col, row then cell
    assert_raise(TypeError) do
      table.dig("A", 0, 0)
    end
  end
end