black -l 80: tests/ formatting (2/3) (#5427)

Summary:
Pull Request resolved: #5427

# this is a no-op change

Part 2 of a 3-diff split of the faiss `black -l 80` reformat into small, reviewable diffs (each 3-4 files, <100 changed lines). Follow-up to D109736099 (landed), which formatted the faiss Python tree; these files drifted or are new.

Ran `black -l 80` (line length 80, matching faiss's `CONTRIBUTING.md`: "80 character line length (both for C++ and Python)") over the test files: `tests/test_build_blocks.py`, `tests/test_contrib.py`, `tests/test_eden.py`, `tests/test_ivf_flat_panorama.py`.

Pure-formatting only. `black`'s AST-equivalence safety check guarantees no identifier, string/numeric value, operator, or control-flow change — only whitespace, wrapping, trailing commas, and quote normalization. Independently verified: `ast.dump` equality (docstrings normalized) and comment-content preservation. `fbcode/faiss/` is excluded from Meta's standard Python autoformatter (it mirrors to public GitHub), so `black -l 80` is the correct tool.

___

Reviewed By: trang-nm-nguyen

Differential Revision: D112191719

fbshipit-source-id: 20fc89768077a16fb6abd6c2fe58981c3febf0ea

Author: limqiying

tests/test_build_blocks.py

@@ -669,14 +669,14 @@ def test_small(self):
 
     def xx_test_large(self):
         # don't run by default because it's slow
-        self.do_test(2 ** 21, 10 ** 6)
+        self.do_test(2**21, 10**6)
 
 
 class TestRanklistIntersectionSize(unittest.TestCase):
 
     def _intersect(self, v1, v2):
-        a = np.array(v1, dtype='int64')
-        b = np.array(v2, dtype='int64')
+        a = np.array(v1, dtype="int64")
+        b = np.array(v2, dtype="int64")
         return faiss.ranklist_intersection_size(
             len(a), faiss.swig_ptr(a), len(b), faiss.swig_ptr(b)
         )
@@ -706,5 +706,5 @@ def test_negative_values_not_counted(self):
 
     def test_ids_above_2_pow_60(self):
         # the old bit-flag trick corrupted IDs with bit 60 set
-        v1, v2 = [2 ** 60, 2 ** 61, 2 ** 62], [2 ** 61, 2 ** 62, 2 ** 63 - 1]
+        v1, v2 = [2**60, 2**61, 2**62], [2**61, 2**62, 2**63 - 1]
         self.assertEqual(self._intersect(v1, v2), self._expected(v1, v2))

tests/test_contrib.py

@@ -319,8 +319,7 @@ def test_equal_time_better_perf_shadows(self):
         pts = op.operating_points
         for _, pi, ti in pts:
             for _, pj, tj in pts:
-                self.assertFalse(
-                    pj >= pi and tj <= ti and (pj > pi or tj < ti))
+                self.assertFalse(pj >= pi and tj <= ti and (pj > pi or tj < ti))
 
 
 class TestPreassigned(unittest.TestCase):
@@ -933,13 +932,19 @@ def test_scalar_quantizer_types(self):
     def test_get_code_size_hnsw_non_default_m(self):
         d = 128
         # Non-default M values previously raised RuntimeError("cannot parse HNSW16")
-        self.assertEqual(factory_tools.get_code_size(d, "HNSW16"), d * 4 + 16 * 2 * 4)
-        self.assertEqual(factory_tools.get_code_size(d, "HNSW64"), d * 4 + 64 * 2 * 4)
+        self.assertEqual(
+            factory_tools.get_code_size(d, "HNSW16"), d * 4 + 16 * 2 * 4
+        )
+        self.assertEqual(
+            factory_tools.get_code_size(d, "HNSW64"), d * 4 + 64 * 2 * 4
+        )
         self.assertEqual(
             factory_tools.get_code_size(d, "HNSW16,Flat"), d * 4 + 16 * 2 * 4
         )
         # HNSW32 backward compat: formula generalizes correctly
-        self.assertEqual(factory_tools.get_code_size(d, "HNSW32"), d * 4 + 32 * 2 * 4)
+        self.assertEqual(
+            factory_tools.get_code_size(d, "HNSW32"), d * 4 + 32 * 2 * 4
+        )
 
     def test_get_code_size_ivf_hnsw_non_default_m(self):
         d = 128
@@ -948,7 +953,8 @@ def test_get_code_size_ivf_hnsw_non_default_m(self):
             factory_tools.get_code_size(d, "IVF64_HNSW16,Flat"), d * 4
         )
         self.assertEqual(
-            factory_tools.get_code_size(d, "IVF64_HNSW64,PQ8x8"), (8 * 8 + 7) // 8
+            factory_tools.get_code_size(d, "IVF64_HNSW64,PQ8x8"),
+            (8 * 8 + 7) // 8,
         )
 
     def test_get_code_size_hnsw_roundtrip(self):

tests/test_eden.py

@@ -63,7 +63,9 @@ def eden_reference_reconstruct(x, bits, center=None, scale_type="unbiased"):
     return out
 
 
-def eden_reference_l2_distances(x, query, bits, center=None, scale_type="unbiased"):
+def eden_reference_l2_distances(
+    x, query, bits, center=None, scale_type="unbiased"
+):
     x = np.asarray(x, dtype="float32")
     query = np.asarray(query, dtype="float32")
     if center is None:
@@ -205,9 +207,7 @@ def test_factory_flat_and_ivf(self):
         self.assertTrue(np.any(I >= 0))
 
     def test_search_matches_none_simd_level(self):
-        if not faiss.SIMDConfig.is_simd_level_available(
-            faiss.SIMDLevel_NONE
-        ):
+        if not faiss.SIMDConfig.is_simd_level_available(faiss.SIMDLevel_NONE):
             self.skipTest("SIMDLevel.NONE not available")
 
         levels = [

tests/test_ivf_flat_panorama.py

@@ -104,7 +104,9 @@ def assert_search_results_equal(
             atol=atol,
             err_msg="Distances mismatch",
         )
-        check_ref_knn_with_draws(D_regular, I_regular, D_regular, I_panorama, rtol=rtol)
+        check_ref_knn_with_draws(
+            D_regular, I_regular, D_regular, I_panorama, rtol=rtol
+        )
 
     def assert_range_results_equal(
         self,