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Contents
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
test "returns :error on empty list" do
assert Change.generate(1, []) == :error
end
@tag :pending
test "generates the correct change when only one coin type is needed" do
change = %{1 => 5, 10 => 0}
assert Change.generate(5, [1, 10]) == {:ok, change}
end
@tag :pending
test "generates the correct change when multiple coin types are needed" do
change = %{1 => 3, 5 => 1, 10 => 1}
assert Change.generate(18, [1, 5, 10]) == {:ok, change}
end
@tag :pending
test "returns :error when it is not possible to generate change" do
assert Change.generate(3, [5, 10, 25]) == :error
end
@tag :pending
test "generates change using only small coins when it is not possible to combine them with larger coins" do
change = %{3 => 34, 100 => 0}
assert Change.generate(102, [3, 100]) == {:ok, change}
end
@tag :pending
test "generates the same change given any coin order" do
change = %{1 => 3, 5 => 1, 10 => 1}
assert Change.generate(18, [1, 5, 10]) == {:ok, change}
assert Change.generate(18, [10, 5, 1]) == {:ok, change}
end
@tag :pending
test "generates the correct change for large values with many coins" do
change = %{1 => 3, 5 => 1, 10 => 0, 25 => 1, 100 => 1}
assert Change.generate(133, [1, 5, 10, 25, 100]) == {:ok, change}
end
end
Version data entries
130 entries across 130 versions & 1 rubygems