60 lines
1.7 KiB
Elixir
60 lines
1.7 KiB
Elixir
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defmodule RunLengthEncoderTest do
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use ExUnit.Case
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test "encode empty string" do
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assert RunLengthEncoder.encode("") === ""
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end
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test "encode single characters only are encoded without count" do
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assert RunLengthEncoder.encode("XYZ") === "XYZ"
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end
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test "encode string with no single characters" do
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assert RunLengthEncoder.encode("AABBBCCCC") == "2A3B4C"
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end
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test "encode single characters mixed with repeated characters" do
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assert RunLengthEncoder.encode("WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWB") ===
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"12WB12W3B24WB"
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end
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test "encode multiple whitespace mixed in string" do
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assert RunLengthEncoder.encode(" hsqq qww ") === "2 hs2q q2w2 "
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end
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test "encode lowercase characters" do
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assert RunLengthEncoder.encode("aabbbcccc") === "2a3b4c"
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end
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test "decode empty string" do
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assert RunLengthEncoder.decode("") === ""
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end
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test "decode single characters only" do
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assert RunLengthEncoder.decode("XYZ") === "XYZ"
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end
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test "decode string with no single characters" do
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assert RunLengthEncoder.decode("2A3B4C") == "AABBBCCCC"
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end
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test "decode single characters with repeated characters" do
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assert RunLengthEncoder.decode("12WB12W3B24WB") ===
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"WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWB"
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end
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test "decode multiple whitespace mixed in string" do
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assert RunLengthEncoder.decode("2 hs2q q2w2 ") === " hsqq qww "
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end
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test "decode lower case string" do
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assert RunLengthEncoder.decode("2a3b4c") === "aabbbcccc"
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end
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test "encode followed by decode gives original string" do
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original = "zzz ZZ zZ"
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encoded = RunLengthEncoder.encode(original)
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assert RunLengthEncoder.decode(encoded) === original
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end
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end
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