Test round-tripping of binary reel headers to and from a byte stream.

test/test_roundtrip.py

@@ -0,0 +1,24 @@
+import unittest
+from hypothesis import given
+from io import BytesIO
+from hypothesis.specifiers import sampled_from
+from segpy.binary_reel_header import BinaryReelHeader
+from segpy.header import are_equal
+
+from segpy.toolkit import write_binary_reel_header, read_binary_reel_header
+from test.strategies import header
+
+
+class TestBinaryReelHeader(unittest.TestCase):
+
+    @given(header(BinaryReelHeader),
+           sampled_from(['<', '>']))
+    def test_roundtrip(self, write_header, endian):
+        with BytesIO() as write_stream:
+            write_binary_reel_header(write_stream, write_header, endian)
+            written_steam = write_stream.getvalue()
+
+        with BytesIO(written_steam) as read_stream:
+            read_header = read_binary_reel_header(read_stream, endian)
+
+        self.assertTrue(are_equal(write_header, read_header))