66 lines
2.0 KiB
Elixir
66 lines
2.0 KiB
Elixir
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defmodule PerfectNumbersTest do
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use ExUnit.Case
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describe "Perfect numbers" do
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test "Smallest perfect number is classified correctly" do
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assert PerfectNumbers.classify(6) == {:ok, :perfect}
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end
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test "Medium perfect number is classified correctly" do
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assert PerfectNumbers.classify(28) == {:ok, :perfect}
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end
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test "Large perfect number is classified correctly" do
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assert PerfectNumbers.classify(33_550_336) == {:ok, :perfect}
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end
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end
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describe "Abundant numbers" do
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test "Smallest abundant number is classified correctly" do
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assert PerfectNumbers.classify(12) == {:ok, :abundant}
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end
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test "Medium abundant number is classified correctly" do
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assert PerfectNumbers.classify(30) == {:ok, :abundant}
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end
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test "Large abundant number is classified correctly" do
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assert PerfectNumbers.classify(33_550_335) == {:ok, :abundant}
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end
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end
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describe "Deficient numbers" do
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test "Smallest prime deficient number is classified correctly" do
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assert PerfectNumbers.classify(2) == {:ok, :deficient}
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end
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test "Smallest non-prime deficient number is classified correctly" do
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assert PerfectNumbers.classify(4) == {:ok, :deficient}
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end
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test "Medium deficient number is classified correctly" do
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assert PerfectNumbers.classify(32) == {:ok, :deficient}
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end
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test "Large deficient number is classified correctly" do
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assert PerfectNumbers.classify(33_550_337) == {:ok, :deficient}
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end
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test "Edge case (no factors other than itself) is classified correctly" do
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assert PerfectNumbers.classify(1) == {:ok, :deficient}
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end
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end
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describe "Invalid inputs" do
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test "Zero is rejected (not a natural number)" do
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assert PerfectNumbers.classify(0) ==
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{:error, "Classification is only possible for natural numbers."}
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end
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test "Negative integer is rejected (not a natural number)" do
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assert PerfectNumbers.classify(-1) ==
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{:error, "Classification is only possible for natural numbers."}
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end
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end
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end
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