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ex_cldr

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Common Locale Data Repository (CLDR) functions for Elixir to localize and format numbers, dates, lists, messages, languages, territories and units with support for over 700 locales for internationalized (i18n) and localized (L10N) applications.

Retired package: Deprecated
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ex_cldr test significant_digits_test.exs
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test/significant_digits_test.exs 

defmodule Significant.Digits.Test do

  use ExUnit.Case



  test "round 1,239,451 to 3 significant digits and return 1,240,000" do

    assert 1_240_000 == Cldr.Number.Math.round_significant(1239451, 3)

  end



  test "round 12.1257 to 3 significant digits and return 12.1" do

    assert 12.1 == Cldr.Number.Math.round_significant(12.1257, 3)

  end



  test "round .0681 to 3 significant digits and return .0681" do

    assert 0.0681 == Cldr.Number.Math.round_significant(0.0681, 3)

  end



  test "round 5 to 3 significant digits and return 5" do

    assert 5 == Cldr.Number.Math.round_significant(5, 3)

  end



  # From TR35 Section 3.5

  test "round 12345 to 3 significant digits and return 12300" do

    assert 12300 == Cldr.Number.Math.round_significant(12345, 3)

  end



  test "round 0.12345 to 3 significant digits and return 0.123" do

    assert 0.123 == Cldr.Number.Math.round_significant(0.12345, 3)

  end



  test "round 3.14159 to 4 significant digits and return 3.142" do

    assert 3.142 == Cldr.Number.Math.round_significant(3.14159, 4)

  end



  test "round 1.23004 to 4 significant digits and return 1.23" do

    assert 1.23 == Cldr.Number.Math.round_significant(1.23004, 4)

  end



  # Decimal tests

  test "round decimal 12345 to 3 significant digits and return 12300" do

    assert Decimal.reduce(Decimal.new(12300)) ==

      Cldr.Number.Math.round_significant(Decimal.new(12345), 3)

  end



  test "round decimal 0.12345 to 3 significant digits and return 0.123" do

    assert Decimal.new(0.123) ==

      Cldr.Number.Math.round_significant(Decimal.new(0.12345), 3)

  end



  test "round decimal 3.14159 to 4 significant digits and return 3.142" do

    assert Decimal.new(3.142) ==

      Cldr.Number.Math.round_significant(Decimal.new(3.14159), 4)

  end



  test "round decimal 1.23004 to 4 significant digits and return 1.23" do

    assert Decimal.new(1.23) ==

      Cldr.Number.Math.round_significant(Decimal.new(1.23004), 4)

  end



  test "round negative decimal -1.23004 to 4 significant digits and return 1.23" do

    assert Decimal.new(-1.23) ==

      Cldr.Number.Math.round_significant(Decimal.new(-1.23004), 4)

  end

end