76 lines
2.1 KiB
Gleam
76 lines
2.1 KiB
Gleam
import gleam/list
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import gleeunit
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import gleeunit/should
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import kmer.{type DecodeResult, type DecodedValue, Integer}
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pub fn main() {
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gleeunit.main()
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}
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fn table_test_decode_next_value(test_case: BitArray, expected: DecodedValue) {
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kmer.decode_next_value(test_case) |> is_value(expected)
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}
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fn is_value(val: DecodeResult, expected: DecodedValue) {
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should.be_ok(val) |> should.equal(#(expected, <<>>))
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}
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pub fn decode_immediate_int_test() {
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[
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// Small integers under 24
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#(<<0>>, Integer(0)),
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#(<<10>>, Integer(10)),
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#(<<23>>, Integer(23)),
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]
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|> table_fn(table_test_decode_next_value)
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}
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pub fn decode_int_test() {
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[
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// 1-byte length (Maj.arg 24)
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#(<<24, 24>>, Integer(24)),
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#(<<24, 100>>, Integer(100)),
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// 2-byte length (Maj.arg 25)
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#(<<25, 1234:16>>, Integer(1234)),
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#(<<25, 12_345:16>>, Integer(12_345)),
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// 3-byte length (Maj.arg 26)
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#(<<26, 1_234_567:32>>, Integer(1_234_567)),
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#(<<26, 999_999_999:32>>, Integer(999_999_999)),
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// 4-byte length (Maj.arg 27)
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#(<<27, 2_099_210_021_019_898_881:64>>, Integer(2_099_210_021_019_898_881)),
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#(<<27, 3:64>>, Integer(3)),
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]
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|> table_fn(table_test_decode_next_value)
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}
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pub fn decode_negative_int_test() {
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[
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// Immediate negative (under 25)
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#(<<1:3, 0:5>>, Integer(-1)),
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#(<<1:3, 8:5>>, Integer(-9)),
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#(<<1:3, 23:5>>, Integer(-24)),
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// 1-byte length (Maj.arg 24)
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#(<<1:3, 24:5, 24:8>>, Integer(-25)),
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#(<<1:3, 24:5, 100:8>>, Integer(-101)),
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// 2-byte length (Maj.arg 25)
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#(<<1:3, 25:5, 1234:16>>, Integer(-1235)),
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#(<<1:3, 25:5, 12_345:16>>, Integer(-12_346)),
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// 3-byte length (Maj.arg 26)
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#(<<1:3, 26:5, 1_234_567:32>>, Integer(-1_234_568)),
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#(<<1:3, 26:5, 999_999_999:32>>, Integer(-1_000_000_000)),
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// 4-byte length (Maj.arg 27)
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#(
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<<1:3, 27:5, 2_099_210_021_019_898_881:64>>,
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Integer(-2_099_210_021_019_898_882),
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),
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#(<<1:3, 27:5, 3:64>>, Integer(-4)),
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]
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|> table_fn(table_test_decode_next_value)
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}
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fn table_fn(tests: List(#(a, b)), test_fn: fn(a, b) -> Nil) {
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list.map(tests, fn(t) {
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let #(test_case, expected) = t
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test_fn(test_case, expected)
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})
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}
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