```ruby
require 'minitest/autorun'
require_relative 'sum_of_multiples'

class SumTest < Minitest::Test
  def test_sum_to_1
    assert_equal 0, SumOfMultiples.to(1)
  end

  def test_sum_to_3
    skip
    assert_equal 3, SumOfMultiples.to(4)
  end

  def test_sum_to_10
    skip
    assert_equal 23, SumOfMultiples.to(10)
  end

  def test_sum_to_1000
    skip
    assert_equal 233_168, SumOfMultiples.to(1000)
  end

  def test_configurable_7_13_17_to_20
    skip
    assert_equal 51, SumOfMultiples.new(7, 13, 17).to(20)
  end

  def test_configurable_43_47_to_10000
    skip
    assert_equal 2_203_160, SumOfMultiples.new(43, 47).to(10_000)
  end
end
```

Add test cases to Sum of Multiples
user
```ruby
require 'minitest/autorun'
require_relative 'sum_of_multiples'

class SumTest < Minitest::Test
  def test_sum_to_1
    assert_equal 0, SumOfMultiples.to(1)
  end

  def test_sum_to_3
    skip
    assert_equal 3, SumOfMultiples.to(4)
  end

  def test_sum_to_10
    skip
    assert_equal 23, SumOfMultiples.to(10)
  end

  def test_sum_to_1000
    skip
    assert_equal 233_168, SumOfMultiples.to(1000)
  end

  def test_configurable_7_13_17_to_20
    skip
    assert_equal 51, SumOfMultiples.new(7, 13, 17).to(20)
  end

  def test_configurable_4_6_to_15
    skip
    assert_equal 30, SumOfMultiples.new(4, 6).to(15)
  end

  def test_configurable_5_6_8_to_150
    skip
    assert_equal 4419, SumOfMultiples.new(5, 6, 8).to(150)
  end

  def test_configurable_43_47_to_10000
    skip
    assert_equal 2_203_160, SumOfMultiples.new(43, 47).to(10_000)
  end
end
```
assistant