removed BaseTestCase from chunker_slow.py

src/borg/testsuite/chunker_slow.py

@@ -5,35 +5,33 @@ from .chunker import cf
 from ..chunker import Chunker
 from ..crypto.low_level import blake2b_256
 from ..constants import *  # NOQA
-from . import BaseTestCase
 
 
-class ChunkerRegressionTestCase(BaseTestCase):
-    def test_chunkpoints_unchanged(self):
-        def twist(size):
-            x = 1
-            a = bytearray(size)
-            for i in range(size):
-                x = (x * 1103515245 + 12345) & 0x7FFFFFFF
-                a[i] = x & 0xFF
-            return a
+def test_chunkpoints_unchanged():
+    def twist(size):
+        x = 1
+        a = bytearray(size)
+        for i in range(size):
+            x = (x * 1103515245 + 12345) & 0x7FFFFFFF
+            a[i] = x & 0xFF
+        return a
 
-        data = twist(100000)
+    data = twist(100000)
 
-        runs = []
-        for winsize in (65, 129, HASH_WINDOW_SIZE, 7351):
-            for minexp in (4, 6, 7, 11, 12):
-                for maxexp in (15, 17):
-                    if minexp >= maxexp:
-                        continue
-                    for maskbits in (4, 7, 10, 12):
-                        for seed in (1849058162, 1234567653):
-                            fh = BytesIO(data)
-                            chunker = Chunker(seed, minexp, maxexp, maskbits, winsize)
-                            chunks = [blake2b_256(b"", c) for c in cf(chunker.chunkify(fh, -1))]
-                            runs.append(blake2b_256(b"", b"".join(chunks)))
+    runs = []
+    for winsize in (65, 129, HASH_WINDOW_SIZE, 7351):
+        for minexp in (4, 6, 7, 11, 12):
+            for maxexp in (15, 17):
+                if minexp >= maxexp:
+                    continue
+                for maskbits in (4, 7, 10, 12):
+                    for seed in (1849058162, 1234567653):
+                        fh = BytesIO(data)
+                        chunker = Chunker(seed, minexp, maxexp, maskbits, winsize)
+                        chunks = [blake2b_256(b"", c) for c in cf(chunker.chunkify(fh, -1))]
+                        runs.append(blake2b_256(b"", b"".join(chunks)))
 
-        # The "correct" hash below matches the existing chunker behavior.
-        # Future chunker optimisations must not change this, or existing repos will bloat.
-        overall_hash = blake2b_256(b"", b"".join(runs))
-        self.assert_equal(overall_hash, unhexlify("b559b0ac8df8daaa221201d018815114241ea5c6609d98913cd2246a702af4e3"))
+    # The "correct" hash below matches the existing chunker behavior.
+    # Future chunker optimisations must not change this, or existing repos will bloat.
+    overall_hash = blake2b_256(b"", b"".join(runs))
+    assert overall_hash == unhexlify("b559b0ac8df8daaa221201d018815114241ea5c6609d98913cd2246a702af4e3")