1 files changed, 121 insertions, 0 deletions
diff --git a/python/bitstring/test/test_constbitstream.py b/python/bitstring/test/test_constbitstream.py
new file mode 100644
index 000000000..a1bef743f
--- /dev/null
+++ b/python/bitstring/test/test_constbitstream.py
@@ -0,0 +1,121 @@
+#!/usr/bin/env python
+
+import unittest
+import sys
+sys.path.insert(0, '..')
+import bitstring
+from bitstring import ConstBitStream as CBS
+
+class All(unittest.TestCase):
+    def testFromFile(self):
+        s = CBS(filename='test.m1v')
+        self.assertEqual(s[0:32].hex, '000001b3')
+        self.assertEqual(s.read(8 * 4).hex, '000001b3')
+        width = s.read(12).uint
+        height = s.read(12).uint
+        self.assertEqual((width, height), (352, 288))
+
+
+class InterleavedExpGolomb(unittest.TestCase):
+    def testReading(self):
+        s = CBS(uie=333)
+        a = s.read('uie')
+        self.assertEqual(a, 333)
+        s = CBS('uie=12, sie=-9, sie=9, uie=1000000')
+        u = s.unpack('uie, 2*sie, uie')
+        self.assertEqual(u, [12, -9, 9, 1000000])
+
+    def testReadingErrors(self):
+        s = CBS(10)
+        self.assertRaises(bitstring.ReadError, s.read, 'uie')
+        self.assertEqual(s.pos, 0)
+        self.assertRaises(bitstring.ReadError, s.read, 'sie')
+        self.assertEqual(s.pos, 0)
+
+
+class ReadTo(unittest.TestCase):
+    def testByteAligned(self):
+        a = CBS('0xaabb00aa00bb')
+        b = a.readto('0x00', bytealigned=True)
+        self.assertEqual(b, '0xaabb00')
+        self.assertEqual(a.bytepos, 3)
+        b = a.readto('0xaa', bytealigned=True)
+        self.assertEqual(b, '0xaa')
+        self.assertRaises(bitstring.ReadError, a.readto, '0xcc', bytealigned=True)
+
+    def testNotAligned(self):
+        a = CBS('0b00111001001010011011')
+        a.pos = 1
+        self.assertEqual(a.readto('0b00'), '0b011100')
+        self.assertEqual(a.readto('0b110'), '0b10010100110')
+        self.assertRaises(ValueError, a.readto, '')
+
+    def testDisallowIntegers(self):
+        a = CBS('0x0f')
+        self.assertRaises(ValueError, a.readto, 4)
+
+    def testReadingLines(self):
+        s = b"This is a test\nof reading lines\nof text\n"
+        b = CBS(bytes=s)
+        n = bitstring.Bits(bytes=b'\n')
+        self.assertEqual(b.readto(n).bytes, b'This is a test\n')
+        self.assertEqual(b.readto(n).bytes, b'of reading lines\n')
+        self.assertEqual(b.readto(n).bytes, b'of text\n')
+
+
+class Subclassing(unittest.TestCase):
+
+    def testIsInstance(self):
+        class SubBits(CBS): pass
+        a = SubBits()
+        self.assertTrue(isinstance(a, SubBits))
+
+    def testClassType(self):
+        class SubBits(CBS): pass
+        self.assertEqual(SubBits().__class__, SubBits)
+
+
+class PadToken(unittest.TestCase):
+
+    def testRead(self):
+        s = CBS('0b100011110001')
+        a = s.read('pad:1')
+        self.assertEqual(a, None)
+        self.assertEqual(s.pos, 1)
+        a = s.read(3)
+        self.assertEqual(a, CBS('0b000'))
+        a = s.read('pad:0')
+        self.assertEqual(a, None)
+        self.assertEqual(s.pos, 4)
+
+    def testReadList(self):
+        s = CBS('0b10001111001')
+        t = s.readlist('pad:1, uint:3, pad:4, uint:3')
+        self.assertEqual(t, [0, 1])
+        s.pos = 0
+        t = s.readlist('pad:1, pad:5')
+        self.assertEqual(t, [])
+        self.assertEqual(s.pos, 6)
+        s.pos = 0
+        t = s.readlist('pad:1, bin, pad:4, uint:3')
+        self.assertEqual(t, ['000', 1])
+        s.pos = 0
+        t = s.readlist('pad, bin:3, pad:4, uint:3')
+        self.assertEqual(t, ['000', 1])
+
+class ReadingBytes(unittest.TestCase):
+
+    def testUnpackingBytes(self):
+        s = CBS(80)
+        t = s.unpack('bytes:1')
+        self.assertEqual(t[0], b'\x00')
+        a, b, c = s.unpack('bytes:1, bytes, bytes:2')
+        self.assertEqual(a, b'\x00')
+        self.assertEqual(b, b'\x00'*7)
+        self.assertEqual(c, b'\x00'*2)
+
+    def testUnpackingBytesWithKeywords(self):
+        s = CBS('0x55'*10)
+        t = s.unpack('pad:a, bytes:b, bytes, pad:a', a=4, b=6)
+        self.assertEqual(t, [b'\x55'*6, b'\x55'*3])
+