48 lines
1.2 KiB
Elixir
48 lines
1.2 KiB
Elixir
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defmodule ArmstrongNumberTest do
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use ExUnit.Case
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test "Zero is an Armstrong number" do
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assert ArmstrongNumber.valid?(0)
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end
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test "Single digit numbers are Armstrong numbers" do
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assert ArmstrongNumber.valid?(5)
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end
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test "There are no two-digit Armstrong Numbers" do
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refute ArmstrongNumber.valid?(10)
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end
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test "Three-digit number that is an Armstrong number" do
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assert ArmstrongNumber.valid?(153)
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end
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test "Three-digit number that is not an Armstrong number" do
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refute ArmstrongNumber.valid?(100)
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end
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test "Four-digit number that is an Armstrong number" do
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assert ArmstrongNumber.valid?(9474)
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end
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test "Four-digit number that is not an Armstrong number" do
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refute ArmstrongNumber.valid?(9475)
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end
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test "Seven-digit number that is an Armstrong number" do
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assert ArmstrongNumber.valid?(9_926_315)
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end
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test "Seven-digit number that is not an Armstrong number" do
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refute ArmstrongNumber.valid?(9_926_134)
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end
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test "Armstrong number containing seven zeroes" do
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assert ArmstrongNumber.valid?(186_709_961_001_538_790_100_634_132_976_990)
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end
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test "The largest and last Armstrong number" do
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assert ArmstrongNumber.valid?(115_132_219_018_763_992_565_095_597_973_971_522_401)
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end
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end
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