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