fix test folder name

tests/external/nichevi/test_nichevi.py

@@ -0,0 +1,188 @@
+import numpy as np
+import pytest
+from anndata import AnnData
+
+from scvi.data import synthetic_iid
+from scvi.external import nicheSCVI
+
+N_LATENT = 10
+K_NN = 5
+N_EPOCHS_NICHEVI = 2
+
+setup_kwargs = {
+    "sample_key": "batch",
+    "labels_key": "labels",
+    "cell_coordinates_key": "coordinates",
+    "expression_embedding_key": "qz1_m",
+    "expression_embedding_niche_key": "qz1_m_niche_ct",
+    "niche_composition_key": "neighborhood_composition",
+    "niche_indexes_key": "niche_indexes",
+    "niche_distances_key": "niche_distances",
+}
+
+
+@pytest.fixture(scope="session")
+def adata():
+    adata = synthetic_iid(
+        batch_size=256,
+        n_genes=100,
+        n_proteins=0,
+        n_regions=0,
+        n_batches=2,
+        n_labels=3,
+        dropout_ratio=0.5,
+        generate_coordinates=True,
+        sparse_format=None,
+        return_mudata=False,
+    )
+
+    adata.obsm["qz1_m"] = np.random.normal(size=(adata.shape[0], N_LATENT))
+    adata.layers["counts"] = adata.X.copy()
+
+    return adata
+
+
+def test_nichevi_train(adata: AnnData):
+    nicheSCVI.preprocessing_anndata(
+        adata,
+        k_nn=K_NN,
+        **setup_kwargs,
+    )
+
+    nicheSCVI.setup_anndata(
+        adata,
+        layer="counts",
+        batch_key="batch",
+        **setup_kwargs,
+    )
+    nichevae = nicheSCVI(
+        adata,
+        prior_mixture=False,
+        semisupervised=True,
+        linear_classifier=True,
+    )
+
+    nichevae.train(
+        max_epochs=N_EPOCHS_NICHEVI,
+        train_size=0.8,
+        validation_size=0.2,
+        early_stopping=True,
+        check_val_every_n_epoch=1,
+        accelerator="cpu",
+    )
+
+
+def test_nichevi_save_load(adata):
+    nicheSCVI.preprocessing_anndata(
+        adata,
+        k_nn=K_NN,
+        **setup_kwargs,
+    )
+
+    nicheSCVI.setup_anndata(
+        adata,
+        layer="counts",
+        batch_key="batch",
+        **setup_kwargs,
+    )
+    nichevae = nicheSCVI(
+        adata,
+        prior_mixture=False,
+        semisupervised=True,
+        linear_classifier=True,
+    )
+
+    nichevae.train(
+        max_epochs=N_EPOCHS_NICHEVI,
+        train_size=0.8,
+        validation_size=0.2,
+        early_stopping=True,
+        check_val_every_n_epoch=1,
+        accelerator="cpu",
+    )
+    hist_elbo = nichevae.history["elbo_train"]
+    latent = nichevae.get_latent_representation()
+    assert latent.shape == (adata.n_obs, nichevae.module.n_latent)
+    nichevae.save("test_nichevi", save_anndata=True, overwrite=True)
+    model2 = nichevae.load("test_nichevi")
+    np.testing.assert_array_equal(model2.history_["elbo_train"], hist_elbo)
+    latent2 = model2.get_latent_representation()
+    assert np.allclose(latent, latent2, atol=1e-5)
+
+    nichevae.get_elbo(indices=nichevae.validation_indices)
+    nichevae.get_composition_error(return_mean=False, indices=nichevae.validation_indices)
+    nichevae.get_niche_error(return_mean=False, indices=nichevae.validation_indices)
+    nichevae.get_normalized_expression()
+    nichevae.predict_neighborhood()  # specific to nicheSCVI
+    nichevae.predict_niche_activation()  # specific to nicheSCVI
+
+
+def test_nichevi_differential(adata):
+    nicheSCVI.preprocessing_anndata(
+        adata,
+        k_nn=K_NN,
+        **setup_kwargs,
+    )
+
+    nicheSCVI.setup_anndata(
+        adata,
+        layer="counts",
+        batch_key="batch",
+        **setup_kwargs,
+    )
+    nichevae = nicheSCVI(
+        adata,
+        prior_mixture=False,
+        semisupervised=True,
+        linear_classifier=True,
+    )
+
+    nichevae.train(
+        max_epochs=N_EPOCHS_NICHEVI,
+        train_size=0.8,
+        validation_size=0.2,
+        early_stopping=True,
+        check_val_every_n_epoch=1,
+        accelerator="cpu",
+    )
+
+    nichevae.differential_expression(
+        groupby="labels",
+        group1="label_1",
+        group2="label_2",
+        batch_correction=False,
+        niche_mode=False,
+        fdr_target=1,
+        delta=0.5,
+    )
+
+    nichevae.differential_expression(
+        groupby="labels",
+        group1="label_1",
+        # group2="label_2",
+        batch_correction=False,
+        radius=None,
+        k_nn=5,
+        fdr_target=1,
+        delta=0.5,
+    )
+    nichevae.differential_expression(
+        groupby="labels",
+        group1="label_1",
+        group2="label_2",
+        batch_correction=False,
+        radius=50,
+        k_nn=None,
+        fdr_target=[1, 1, 1, 1],
+        delta=[0.5, 0.5, 0.5, 0.5],
+    )
+    nichevae.differential_expression(
+        groupby="labels",
+        group1="label_1",
+        group2="label_2",
+        batch_correction=False,
+        radius=50,
+        k_nn=None,
+        fdr_target=[1, 1, 1, 1],
+        delta=[0.5, 0.5, 0.5, 0.5],
+    )