c_glib/test/test-table.rb

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#
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class TestTable < Test::Unit::TestCase
  include Helper::Buildable

  sub_test_case(".new") do
    def test_columns
      fields = [
        Arrow::Field.new("visible", Arrow::BooleanDataType.new),
        Arrow::Field.new("valid", Arrow::BooleanDataType.new),
      ]
      schema = Arrow::Schema.new(fields)
      columns = [
        Arrow::Column.new(fields[0], build_boolean_array([true])),
        Arrow::Column.new(fields[1], build_boolean_array([false])),
      ]
      table = Arrow::Table.new(schema, columns)

      data = table.n_columns.times.collect do |i|
        column = table.get_column(i)
        values = []
        column.data.chunks.each do |chunk|
          chunk.length.times do |j|
            values << chunk.get_value(j)
          end
        end
        [
          column.name,
          values,
        ]
      end
      assert_equal([
                     ["visible", [true]],
                     ["valid", [false]],
                   ],
                   data)
    end
  end

  sub_test_case("instance methods") do
    def setup
      fields = [
        Arrow::Field.new("visible", Arrow::BooleanDataType.new),
        Arrow::Field.new("valid", Arrow::BooleanDataType.new),
      ]
      schema = Arrow::Schema.new(fields)
      columns = [
        Arrow::Column.new(fields[0], build_boolean_array([true])),
        Arrow::Column.new(fields[1], build_boolean_array([false])),
      ]
      @table = Arrow::Table.new(schema, columns)
    end

    def test_equal
      fields = [
        Arrow::Field.new("visible", Arrow::BooleanDataType.new),
        Arrow::Field.new("valid", Arrow::BooleanDataType.new),
      ]
      schema = Arrow::Schema.new(fields)
      columns = [
        Arrow::Column.new(fields[0], build_boolean_array([true])),
        Arrow::Column.new(fields[1], build_boolean_array([false])),
      ]
      other_table = Arrow::Table.new(schema, columns)
      assert_equal(@table, other_table)
    end

    def test_schema
      assert_equal(["visible", "valid"],
                   @table.schema.fields.collect(&:name))
    end

    def test_column
      assert_equal("valid", @table.get_column(1).name)
    end

    def test_n_columns
      assert_equal(2, @table.n_columns)
    end

    def test_n_rows
      assert_equal(1, @table.n_rows)
    end

    def test_add_column
      field = Arrow::Field.new("added", Arrow::BooleanDataType.new)
      column = Arrow::Column.new(field, build_boolean_array([true]))
      new_table = @table.add_column(1, column)
      assert_equal(["visible", "added", "valid"],
                   new_table.schema.fields.collect(&:name))
    end

    def test_remove_column
      new_table = @table.remove_column(0)
      assert_equal(["valid"],
                   new_table.schema.fields.collect(&:name))
    end

    def test_replace_column
      field = Arrow::Field.new("added", Arrow::BooleanDataType.new)
      column = Arrow::Column.new(field, build_boolean_array([true]))
      new_table = @table.replace_column(0, column)
      assert_equal(["added", "valid"],
                   new_table.schema.fields.collect(&:name))
    end
  end
end