Triangle Method

Test Data.txt

def test_equilateral_triangles_have_equal_sides
    assert_equal :equilateral, triangle(2, 2, 2)
    assert_equal :equilateral, triangle(10, 10, 10)
  end

  def test_isosceles_triangles_have_exactly_two_sides_equal
    assert_equal :isosceles, triangle(3, 4, 4)
    assert_equal :isosceles, triangle(4, 3, 4)
    assert_equal :isosceles, triangle(4, 4, 3)
    assert_equal :isosceles, triangle(10, 10, 2)
  end


  def test_scalene_triangles_have_no_equal_sides
    assert_equal :scalene, triangle(3, 4, 5)
    assert_equal :scalene, triangle(10, 11, 12)
    assert_equal :scalene, triangle(5, 4, 2)
  end

triangle.rb

def triangle(first, second, third)

 if first == second && second == third
    :equilateral
 elsif first != second && second != third && first != third
    :scalene
 else
    :isosceles
 end
end