1 files changed, 145 insertions, 0 deletions
diff --git a/prototype/fw/test/microcobs.py b/prototype/fw/test/microcobs.py
new file mode 100644
index 0000000..1d09efd
--- /dev/null
+++ b/prototype/fw/test/microcobs.py
@@ -0,0 +1,145 @@
+
+import itertools
+import unittest
+import os
+import subprocess
+import binascii
+import random
+import tempfile
+
+from cobs import cobs
+
+INTERESTING = bytes([1, 2, 3, 0, 1, 2, 3, 0, 0, 1, 2, 3, 0, 0, 0, 1, 2, 3] + list(range(256)))
+class MicrocobsScatterGatherTest(unittest.TestCase):
+    def do_test(self, data_sglist):
+        data_sglist = list(data_sglist)
+        ref = cobs.encode(b''.join(data_sglist))
+        input = b'\n'.join(binascii.hexlify(x) for x in data_sglist)
+
+        debug_file = tempfile.NamedTemporaryFile(prefix='microcobs_test_', delete=False)
+        debug_file.write(input)
+
+        try:
+            test = subprocess.check_output(os.getenv('MICROCOBS_SG_TEST_BINARY', 'build/microcobs_test_sg'),
+                    input=input, stderr=subprocess.DEVNULL)
+            test = binascii.unhexlify(test.strip())
+
+            self.assertEqual(test[-1], 0, 'Missing terminating null byte')
+            self.assertEqual(ref, test[:-1], f'Mismatched output for input {debug_file.name}')
+
+            debug_file.close()
+            os.remove(debug_file.name)
+        except Exception as e:
+            raise SystemError(f'Test error for input {debug_file.name}') from e
+
+
+    def test_empty_chunks(self):
+        for i in range(256):
+            self.do_test([b''] * i)
+
+
+    def test_interspersed_empty_chunks(self):
+        testdata = INTERESTING
+        for i in range(len(testdata) + 1):
+            self.do_test([testdata[:i], b'', testdata[i:]])
+
+    def test_interspersed_double_empty_chunks(self):
+        testdata = INTERESTING
+        for i in range(len(testdata) + 1):
+            self.do_test([testdata[:i], b'', b'', testdata[i:]])
+
+    def test_one_byte_chunks(self):
+        testdata = INTERESTING
+        self.do_test(itertools.chain.from_iterable(zip([bytes([x]) for x in testdata], [b''] * len(testdata))))
+
+    def test_one_byte(self):
+        for i in range(256):
+            self.do_test([bytes([i])])
+
+    def test_lengths(self):
+        for i in range(260):
+            self.do_test([bytes([0xff] * i)])
+
+    def test_null_then_lengths(self):
+        for i in range(256):
+            self.do_test([bytes([0] + [0xff] * i)])
+
+    def test_lengths_then_null(self):
+        for i in range(256):
+            self.do_test([bytes([0xff] * i + [0])])
+
+    def test_two_byte(self):
+        for i in range(4):
+            for j in range(4):
+                self.do_test([bytes([i, j])])
+                self.do_test([bytes([i]), bytes([j])])
+
+    def test_long(self):
+        for i in range(5):
+            self.do_test([b'A' * (100 + 256*i)])
+            self.do_test([b'A' * 100] * 256*i)
+
+    def test_random(self):
+        for i in range(1000):
+            testdata = os.urandom(random.randint(0, 600))
+
+            chunks = [testdata]
+            for i in range(random.randint(0, len(testdata) // 5)):
+                idx = random.randint(0, len(chunks)-1)
+                chunk = chunks[idx]
+                bidx = random.randint(0, len(chunk))
+                chunks = chunks[:idx] + [chunk[:bidx], chunk[bidx:]] + chunks[idx+1:]
+
+            self.do_test(chunks)
+
+class MicrocobsTest(unittest.TestCase):
+    def do_test(self, data):
+        ref = cobs.encode(data)
+        input = binascii.hexlify(data)
+
+        debug_file = tempfile.NamedTemporaryFile(prefix='microcobs_test_', delete=False)
+        debug_file.write(input)
+
+        try:
+            test = subprocess.check_output(os.getenv('MICROCOBS_TEST_BINARY', 'build/microcobs_test'),
+                    input=input, stderr=subprocess.DEVNULL)
+            test = binascii.unhexlify(test.strip())
+
+            self.assertEqual(test[-1], 0, 'Missing terminating null byte')
+            self.assertEqual(ref, test[:-1], f'Mismatched output for input {debug_file.name}')
+
+            debug_file.close()
+            os.remove(debug_file.name)
+        except Exception as e:
+            raise SystemError(f'Test error for input {debug_file.name}') from e
+
+
+    def test_one_byte(self):
+        for i in range(256):
+            self.do_test(bytes([i]))
+
+    def test_lengths(self):
+        for i in range(260):
+            self.do_test(bytes([0xff] * i))
+
+    def test_null_then_lengths(self):
+        for i in range(256):
+            self.do_test(bytes([0] + [0xff] * i))
+
+    def test_lengths_then_null(self):
+        for i in range(256):
+            self.do_test(bytes([0xff] * i + [0]))
+
+    def test_two_byte(self):
+        for i in range(4):
+            for j in range(4):
+                self.do_test(bytes([i, j]))
+
+    def test_long(self):
+        for i in range(5):
+            self.do_test(b'A' * (100 + 256*i))
+
+    def test_random(self):
+        for i in range(10000):
+            self.do_test(os.urandom(random.randint(0, 600)))
+