42 lines
1.2 KiB
Elixir
42 lines
1.2 KiB
Elixir
defmodule HammingTest do
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use ExUnit.Case
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test "empty strands" do
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assert Hamming.hamming_distance(~c"", ~c"") == {:ok, 0}
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end
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test "single letter identical strands" do
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assert Hamming.hamming_distance(~c"A", ~c"A") == {:ok, 0}
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end
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test "single letter different strands" do
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assert Hamming.hamming_distance(~c"G", ~c"T") == {:ok, 1}
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end
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test "long identical strands" do
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assert Hamming.hamming_distance(~c"GGACTGAAATCTG", ~c"GGACTGAAATCTG") == {:ok, 0}
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end
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test "long different strands" do
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assert Hamming.hamming_distance(~c"GGACGGATTCTG", ~c"AGGACGGATTCT") == {:ok, 9}
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end
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test "disallow first strand longer" do
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assert {:error, "strands must be of equal length"} =
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Hamming.hamming_distance(~c"AATG", ~c"AAA")
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end
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test "disallow second strand longer" do
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assert {:error, "strands must be of equal length"} =
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Hamming.hamming_distance(~c"ATA", ~c"AGTG")
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end
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test "disallow empty first strand" do
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assert {:error, "strands must be of equal length"} = Hamming.hamming_distance(~c"", ~c"G")
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end
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test "disallow empty second strand" do
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assert {:error, "strands must be of equal length"} = Hamming.hamming_distance(~c"G", ~c"")
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end
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end
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