1 files changed, 85 insertions, 0 deletions

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 @@
+# gzip-like LZSS compressor
+# Copyright (C) 2018  Pacien TRAN-GIRARD
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+import unittest, streams
+import bitio/bitwriter
+
+suite "bitwriter":
+  test "flush":
+    let stream = newStringStream()
+    defer: stream.close()
+    let bitWriter = stream.bitWriter()
+
+    bitWriter.writeBool(true)
+    stream.setPosition(0)
+    expect IOError: discard stream.peekUint8()
+  
+    bitWriter.flush()
+    stream.setPosition(0)
+    check stream.readUint8() == 0x01'u8
+    check stream.atEnd()
+
+    bitWriter.flush()
+    check stream.atEnd()
+
+  test "writeBool":
+    let stream = newStringStream()
+    defer: stream.close()
+
+    let bitWriter = stream.bitWriter()
+    let booleanValues = @[
+      true, true, true, true, true, false, false, true,
+      false, false, false, false, false, true, true, false,
+      true, true, false, true]
+    for b in booleanValues: bitWriter.writeBool(b)
+    bitWriter.flush()
+
+    stream.setPosition(0)
+    check stream.readUint8() == 0b1001_1111'u8
+    check stream.readUint8() == 0b0110_0000'u8
+    check stream.readUint8() == 0b0000_1011'u8
+    expect IOError: discard stream.readUint8()
+    check stream.atEnd()
+
+  test "writeBits":
+    let stream = newStringStream()
+    defer: stream.close()
+
+    let bitWriter = stream.bitWriter()
+    bitWriter.writeBits(4, 0xF00F'u16)
+    bitWriter.writeBits(16, 0xF00F'u16)
+    bitWriter.writeBits(16, 0xFFFF'u16)
+    bitWriter.flush()
+
+    stream.setPosition(0)
+    check stream.readUint16() == 0x00FF'u16
+    check stream.readUint16() == 0xFFFF'u16
+    check stream.readUint8() == 0x0F'u8
+    expect IOError: discard stream.readUint8()
+    check stream.atEnd()
+
+  test "writeSeq":
+    let stream = newStringStream()
+    defer: stream.close()
+
+    let bitWriter = stream.bitWriter()
+    bitWriter.writeSeq(32, @[0xF0F0'u16, 0xF0F0])
+    bitWriter.writeSeq(28, @[0xFF'u8, 0xF0, 0x00, 0xFF])
+    bitWriter.flush()
+
+    stream.setPosition(0)
+    check stream.readUint64() == 0x0F00_F0FF_F0F0_F0F0'u64
+    check stream.atEnd()