cs142 project 2 unit test

cs142p2unitTest.rb

require "./squared.rb"
require "./sort.rb"
require "./filter.rb"
require "./group.rb"
require "./adder.rb"
require "test/unit"

class TestSquared < Test::Unit::TestCase
  def test_squared
    for i in (0..10) do
      assert_equal(i*i, i.squared)
    end
  end
end

class TestSort < Test::Unit::TestCase
  def test_sort
    a = ['abc99.6','-100x500', 'what', 'w9', 'e2']
    aFunnySorted = ['what', 'e2', 'w9', 'abc99.6', '-100x500']
    assert_equal(aFunnySorted, funny_sort(a))

    b = ['cat32.102','something','-178','e3']
    bFunnySorted = ['something', 'e3', 'cat32.102', '-178']
    assert_equal(bFunnySorted, funny_sort(b))

    c = ['abc99.6','-105x500', 'what', 'w9', 'e2', 'e2', 'e2', '-100x501']
    cFunnySorted = ['what', 'e2', 'e2', 'e2', 'w9', 'abc99.6', '-100x501', '-105x500']
    assert_equal(cFunnySorted, funny_sort(c))

    d = ['a5.12a', 'b1.119e', '0.100', '-19.20']
    dFunnySorted = [ '0.100', 'b1.119e', 'a5.12a', '-19.20']
    assert_equal(dFunnySorted, funny_sort(d))
  end
end

class TestFilter < Test::Unit::TestCase
  def test_filter
    nums = [6, -5, 319, 400, 18, 94, 11]
    output = Array.new
    filter(nums, :min => 10, :max => 350, :odd => 1, :scale => 2) {|n| output << n}
    assert_equal([638, 22], output)

    empty = []
    filter(nums, :max => 0) {|x| empty << x }
    same = []
    filter(nums) {|n| same << n}
    assert_equal(nums, same)
  end
end

class TestGroup < Test::Unit::TestCase
  def test_group
    pre = ["hello", "iam", "chilling", "dude"]
    post = {"h" => ["hello"], "i" => ["iam"], "c" => ["chilling"], "d" => ["dude"]}
    out = {}
    pre.each_group_by_first_letter do |letter, words| 
      out[letter] = words
    end
    assert_equal(post, out)
  end
end

class TestAdder < Test::Unit::TestCase
  def test_method_missing
    x = Adder.new(10)
    assert_raise NoMethodError do
      x.plus1a
    end
    assert_raise NoMethodError do
      x.minus2
    end
  end
  def test_correct_usage
    x = Adder.new(10)
    assert_equal(30, x.plus20)
    assert_equal(35, x.plus25)
  end
end

Goes in the working directory. Run it: ruby testfilename.rb