test(hybrid): add ut for descriptor hybrid (#3711)

Fix #3705.

Signed-off-by: Jinzhe Zeng <jinzhe.zeng@rutgers.edu>

deepmd/dpmodel/descriptor/dpa1.py

@@ -527,6 +527,7 @@ def call(
         # nf x nloc x (ng x ng1 + tebd_dim)
         if self.concat_output_tebd:
             grrg = np.concatenate([grrg, atype_embd.reshape(nf, nloc, -1)], axis=-1)
+        gr = gr.reshape(nf, nloc, *gr.shape[1:])
         return grrg, gr[..., 1:], None, None, sw
 
     def serialize(self) -> dict:

source/tests/common/dpmodel/test_descriptor_hybrid.py

@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: LGPL-3.0-or-later
+import unittest
+
+import numpy as np
+
+from deepmd.dpmodel.descriptor.dpa1 import (
+    DescrptDPA1,
+)
+from deepmd.dpmodel.descriptor.hybrid import (
+    DescrptHybrid,
+)
+from deepmd.dpmodel.descriptor.se_e2_a import (
+    DescrptSeA,
+)
+from deepmd.dpmodel.descriptor.se_r import (
+    DescrptSeR,
+)
+
+from .case_single_frame_with_nlist import (
+    TestCaseSingleFrameWithNlist,
+)
+
+
+class TestDescrptHybrid(unittest.TestCase, TestCaseSingleFrameWithNlist):
+    def setUp(self):
+        unittest.TestCase.setUp(self)
+        TestCaseSingleFrameWithNlist.setUp(self)
+
+    def test_self_consistency(
+        self,
+    ):
+        rng = np.random.default_rng()
+        nf, nloc, nnei = self.nlist.shape
+        davg = rng.normal(size=(self.nt, nnei, 4))
+        dstd = rng.normal(size=(self.nt, nnei, 4))
+        dstd = 0.1 + np.abs(dstd)
+
+        ddsub0 = DescrptSeA(
+            rcut=self.rcut,
+            rcut_smth=self.rcut_smth,
+            sel=self.sel,
+        )
+        ddsub0.davg = davg
+        ddsub0.dstd = dstd
+        ddsub1 = DescrptDPA1(
+            rcut=self.rcut,
+            rcut_smth=self.rcut_smth,
+            sel=np.sum(self.sel).item() - 1,
+            ntypes=len(self.sel),
+        )
+        ddsub1.davg = davg[:, :6]
+        ddsub1.dstd = dstd[:, :6]
+        ddsub2 = DescrptSeR(
+            rcut=self.rcut / 2,
+            rcut_smth=self.rcut_smth,
+            sel=[3, 1],
+        )
+        ddsub2.davg = davg[:, :4, :1]
+        ddsub2.dstd = dstd[:, :4, :1]
+        em0 = DescrptHybrid(list=[ddsub0, ddsub1, ddsub2])
+
+        em1 = DescrptHybrid.deserialize(em0.serialize())
+        mm0 = em0.call(self.coord_ext, self.atype_ext, self.nlist)
+        mm1 = em1.call(self.coord_ext, self.atype_ext, self.nlist)
+        for ii in [0, 1]:
+            np.testing.assert_allclose(mm0[ii], mm1[ii])