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-rw-r--r--tests/bitio/tbitreader.nim84
-rw-r--r--tests/bitio/tbitwriter.nim85
-rw-r--r--tests/bitio/tintegers.nim43
3 files changed, 212 insertions, 0 deletions
diff --git a/tests/bitio/tbitreader.nim b/tests/bitio/tbitreader.nim
new file mode 100644
index 0000000..3949b8b
--- /dev/null
+++ b/tests/bitio/tbitreader.nim
@@ -0,0 +1,84 @@
1# gzip-like LZSS compressor
2# Copyright (C) 2018 Pacien TRAN-GIRARD
3#
4# This program is free software: you can redistribute it and/or modify
5# it under the terms of the GNU Affero General Public License as
6# published by the Free Software Foundation, either version 3 of the
7# License, or (at your option) any later version.
8#
9# This program is distributed in the hope that it will be useful,
10# but WITHOUT ANY WARRANTY; without even the implied warranty of
11# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12# GNU Affero General Public License for more details.
13#
14# You should have received a copy of the GNU Affero General Public License
15# along with this program. If not, see <https://www.gnu.org/licenses/>.
16
17import unittest, streams, sugar
18import bitio/bitreader
19
20suite "bitreader":
21 test "readBool":
22 let stream = newStringStream()
23 defer: stream.close()
24 stream.write(0b1001_1111'u8)
25 stream.write(0b0110_0000'u8)
26 stream.setPosition(0)
27
28 let bitReader = stream.bitReader()
29 check lc[bitReader.readBool() | (_ <- 0..<16), bool] == @[
30 true, true, true, true, true, false, false, true,
31 false, false, false, false, false, true, true, false]
32
33 expect IOError: discard bitReader.readBool()
34 check bitReader.atEnd()
35
36 test "readBits":
37 let stream = newStringStream()
38 defer: stream.close()
39 stream.write(0xF00F'u16)
40 stream.write(0x0FFF'u16)
41 stream.setPosition(0)
42
43 let bitReader = stream.bitReader()
44 check bitReader.readBits(8, uint8) == 0x0F'u8
45 check bitReader.readBits(16, uint16) == 0xFFF0'u16
46 check bitReader.readBits(8, uint8) == 0x0F'u8
47
48 expect RangeError: discard bitReader.readBits(9, uint8)
49 expect IOError: discard bitReader.readBits(16, uint16)
50 check bitReader.atEnd()
51
52 test "readBits (look-ahead overflow)":
53 let stream = newStringStream()
54 defer: stream.close()
55 stream.write(0xAB'u8)
56 stream.setPosition(0)
57
58 let bitReader = stream.bitReader()
59 check bitReader.readBits(4, uint16) == 0x000B'u16
60 check bitReader.readBits(4, uint16) == 0x000A'u16
61 check bitReader.atEnd()
62
63 test "readBits (from buffer composition)":
64 let stream = newStringStream()
65 defer: stream.close()
66 stream.write(0xABCD'u16)
67 stream.setPosition(0)
68
69 let bitReader = stream.bitReader()
70 check bitReader.readBits(4, uint16) == 0x000D'u16
71 check bitReader.readBits(8, uint16) == 0x00BC'u16
72 check bitReader.readBits(4, uint16) == 0x000A'u16
73 check bitReader.atEnd()
74
75 test "readSeq":
76 let stream = newStringStream()
77 defer: stream.close()
78 stream.write(0x0F00_F0FF_F0F0_F0F0'u64)
79 stream.setPosition(0)
80
81 let bitReader = stream.bitReader()
82 check bitReader.readSeq(32, uint16) == (32, @[0xF0F0'u16, 0xF0F0])
83 check bitReader.readSeq(40, uint8) == (32, @[0xFF'u8, 0xF0, 0x00, 0x0F])
84 check bitReader.atEnd()
diff --git a/tests/bitio/tbitwriter.nim b/tests/bitio/tbitwriter.nim
new file mode 100644
index 0000000..70f5a1b
--- /dev/null
+++ b/tests/bitio/tbitwriter.nim
@@ -0,0 +1,85 @@
1# gzip-like LZSS compressor
2# Copyright (C) 2018 Pacien TRAN-GIRARD
3#
4# This program is free software: you can redistribute it and/or modify
5# it under the terms of the GNU Affero General Public License as
6# published by the Free Software Foundation, either version 3 of the
7# License, or (at your option) any later version.
8#
9# This program is distributed in the hope that it will be useful,
10# but WITHOUT ANY WARRANTY; without even the implied warranty of
11# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12# GNU Affero General Public License for more details.
13#
14# You should have received a copy of the GNU Affero General Public License
15# along with this program. If not, see <https://www.gnu.org/licenses/>.
16
17import unittest, streams
18import bitio/bitwriter
19
20suite "bitwriter":
21 test "flush":
22 let stream = newStringStream()
23 defer: stream.close()
24 let bitWriter = stream.bitWriter()
25
26 bitWriter.writeBool(true)
27 stream.setPosition(0)
28 expect IOError: discard stream.peekUint8()
29
30 bitWriter.flush()
31 stream.setPosition(0)
32 check stream.readUint8() == 0x01'u8
33 check stream.atEnd()
34
35 bitWriter.flush()
36 check stream.atEnd()
37
38 test "writeBool":
39 let stream = newStringStream()
40 defer: stream.close()
41
42 let bitWriter = stream.bitWriter()
43 let booleanValues = @[
44 true, true, true, true, true, false, false, true,
45 false, false, false, false, false, true, true, false,
46 true, true, false, true]
47 for b in booleanValues: bitWriter.writeBool(b)
48 bitWriter.flush()
49
50 stream.setPosition(0)
51 check stream.readUint8() == 0b1001_1111'u8
52 check stream.readUint8() == 0b0110_0000'u8
53 check stream.readUint8() == 0b0000_1011'u8
54 expect IOError: discard stream.readUint8()
55 check stream.atEnd()
56
57 test "writeBits":
58 let stream = newStringStream()
59 defer: stream.close()
60
61 let bitWriter = stream.bitWriter()
62 bitWriter.writeBits(4, 0xF00F'u16)
63 bitWriter.writeBits(16, 0xF00F'u16)
64 bitWriter.writeBits(16, 0xFFFF'u16)
65 bitWriter.flush()
66
67 stream.setPosition(0)
68 check stream.readUint16() == 0x00FF'u16
69 check stream.readUint16() == 0xFFFF'u16
70 check stream.readUint8() == 0x0F'u8
71 expect IOError: discard stream.readUint8()
72 check stream.atEnd()
73
74 test "writeSeq":
75 let stream = newStringStream()
76 defer: stream.close()
77
78 let bitWriter = stream.bitWriter()
79 bitWriter.writeSeq(32, @[0xF0F0'u16, 0xF0F0])
80 bitWriter.writeSeq(28, @[0xFF'u8, 0xF0, 0x00, 0xFF])
81 bitWriter.flush()
82
83 stream.setPosition(0)
84 check stream.readUint64() == 0x0F00_F0FF_F0F0_F0F0'u64
85 check stream.atEnd()
diff --git a/tests/bitio/tintegers.nim b/tests/bitio/tintegers.nim
new file mode 100644
index 0000000..e17a2ac
--- /dev/null
+++ b/tests/bitio/tintegers.nim
@@ -0,0 +1,43 @@
1# gzip-like LZSS compressor
2# Copyright (C) 2018 Pacien TRAN-GIRARD
3#
4# This program is free software: you can redistribute it and/or modify
5# it under the terms of the GNU Affero General Public License as
6# published by the Free Software Foundation, either version 3 of the
7# License, or (at your option) any later version.
8#
9# This program is distributed in the hope that it will be useful,
10# but WITHOUT ANY WARRANTY; without even the implied warranty of
11# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12# GNU Affero General Public License for more details.
13#
14# You should have received a copy of the GNU Affero General Public License
15# along with this program. If not, see <https://www.gnu.org/licenses/>.
16
17import unittest, sequtils
18import bitio/integers
19
20suite "integers":
21 test "Round-up integer division":
22 check 42 /^ 2 == 21
23 check 43 /^ 2 == 22
24
25 test "truncateToUint8":
26 check truncateToUint8(0xFA'u8) == 0xFA'u8
27 check truncateToUint8(0x00FA'u16) == 0xFA'u8
28 check truncateToUint8(0xFFFA'u16) == 0xFA'u8
29
30 test "bitLength":
31 check bitLength(0b1_1111) == 5
32 check bitLength(0b1000_0000) == 8
33
34 test "leastSignificantBits":
35 check leastSignificantBits(0xFF'u8, 3) == 0b0000_0111'u8
36 check leastSignificantBits(0b0001_0101'u8, 3) == 0b0000_0101'u8
37 check leastSignificantBits(0xFF'u8, 10) == 0xFF'u8
38 check leastSignificantBits(0xFFFF'u16, 16) == 0xFFFF'u16
39 check leastSignificantBits(0xFFFF'u16, 8) == 0x00FF'u16
40
41 test "chunks iterator":
42 check toSeq(chunks(70, uint32)) == @[(0, 32), (1, 32), (2, 6)]
43 check toSeq(chunks(32, uint16)) == @[(0, 16), (1, 16)]