pinned POT in pyproject; reintroducing linesearch test with the funct…

…ion in ot library

pyproject.toml

@@ -19,7 +19,7 @@ classifiers = [
 dependencies = [
     "anndata",
     "scanpy",
-    "POT",
+    "POT>=0.9.5",
     "numpy<2",
     "scipy",
     "scikit-learn",

tests/test_paste.py

@@ -213,6 +213,30 @@ def test_fused_gromov_wasserstein(spot_distance_matrix):
     assert_checksum_equals(temp_dir, "fused_gromov_wasserstein.csv")
 
 
+def test_gromov_linesearch(spot_distance_matrix):
+    nx = ot.backend.TorchBackend()
+
+    G = 1.509115054931788e-05 * torch.ones((251, 264)).double()
+    deltaG = torch.Tensor(
+        np.genfromtxt(input_dir / "deltaG.csv", delimiter=",")
+    ).double()
+    costG = 6.0935270338235075
+
+    alpha, fc, cost_G = ot.gromov.solve_gromov_linesearch(
+        G=G,
+        deltaG=deltaG,
+        cost_G=costG,
+        C1=spot_distance_matrix[1],
+        C2=spot_distance_matrix[2],
+        M=0.0,
+        reg=2 * 1.0,
+        nx=nx,
+    )
+    assert alpha == 1.0
+    assert fc == 1
+    assert pytest.approx(cost_G) == -11.20545
+
+
 def test_line_search_partial(spot_distance_matrix):
     G = 1.509115054931788e-05 * torch.ones((251, 264)).double()
     deltaG = torch.Tensor(