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if !System.get_env("EXERCISM_TEST_EXAMPLES") do
Code.load_file("change.exs", __DIR__)
end
ExUnit.start()
ExUnit.configure(exclude: :pending, trace: true)
defmodule ChangeTest do
use ExUnit.Case
# @tag :pending
test "single coin change" do
coins = [1, 5, 10, 25, 100]
expected = [25]
assert Change.generate(coins, 25) == {:ok, expected}
end
@tag :pending
test "multiple coin change" do
coins = [1, 5, 10, 25, 100]
expected = [5, 10]
assert Change.generate(coins, 15) == {:ok, expected}
end
@tag :pending
test "change with Lilliputian Coins" do
coins = [1, 4, 15, 20, 50]
expected = [4, 4, 15]
assert Change.generate(coins, 23) == {:ok, expected}
end
@tag :pending
test "change with Lower Elbonia Coins" do
coins = [1, 5, 10, 21, 25]
expected = [21, 21, 21]
assert Change.generate(coins, 63) == {:ok, expected}
end
@tag :pending
test "large target values" do
coins = [1, 2, 5, 10, 20, 50, 100]
expected = [2, 2, 5, 20, 20, 50, 100, 100, 100, 100, 100, 100, 100, 100, 100]
assert Change.generate(coins, 999) == {:ok, expected}
end
@tag :pending
test "possible change without unit coins available" do
coins = [2, 5, 10, 20, 50]
expected = [2, 2, 2, 5, 10]
assert Change.generate(coins, 21) == {:ok, expected}
end
@tag :pending
test "no coins make 0 change" do
coins = [1, 5, 10, 21, 25]
expected = []
assert Change.generate(coins, 0) == {:ok, expected}
end
@tag :pending
test "error testing for change smaller than the smallest of coins" do
coins = [5, 10]
assert Change.generate(coins, 3) == {:error, "cannot change"}
end
@tag :pending
test "error if no combination can add up to target" do
coins = [5, 10]
assert Change.generate(coins, 94) == {:error, "cannot change"}
end
@tag :pending
test "cannot find negative change values" do
coins = [1, 2, 5]
assert Change.generate(coins, -5) == {:error, "cannot change"}
end
end
Version data entries
69 entries across 69 versions & 1 rubygems