Test that samplers import in CI

.gitlab-ci.yml

@@ -71,6 +71,25 @@ basic-3.10:
   <<: *test-python
   image: python:3.10
 
+.test-samplers-import: &test-samplers-import
+  stage: initial
+  script:
+    - python -m pip install .
+    - python -m pip list installed
+    - python test/test_samplers_import.py
+
+import-samplers-3.8:
+  <<: *test-samplers-import
+  image: containers.ligo.org/lscsoft/bilby/v2-bilby-python38
+
+import-samplers-3.9:
+  <<: *test-samplers-import
+  image: containers.ligo.org/lscsoft/bilby/v2-bilby-python39
+
+import-samplers-3.10:
+  <<: *test-samplers-import
+  image: containers.ligo.org/lscsoft/bilby/v2-bilby-python310
+
 .precommits: &precommits
   stage: initial
   script:

test/import_test.py

+"""
+Tests the number of packages imported with a top-level :code:`import bilby`
+statement.
+"""
+
 import sys
 
 import bilby  # noqa

test/test_samplers_import.py

+"""
+Tests that all of the implemented samplers can be initialized.
+
+The :code:`FakeSampler` is omitted as that doesn't require importing
+any package.
+"""
+import bilby
+
+bilby.core.utils.logger.setLevel("ERROR")
+IMPLEMENTED_SAMPLERS = bilby.core.sampler.IMPLEMENTED_SAMPLERS
+likelihood = bilby.core.likelihood.Likelihood(dict())
+priors = bilby.core.prior.PriorDict(dict(a=bilby.core.prior.Uniform(0, 1)))
+for sampler in IMPLEMENTED_SAMPLERS:
+    if sampler == "fake_sampler":
+        continue
+    sampler_class = IMPLEMENTED_SAMPLERS[sampler]
+    sampler = sampler_class(likelihood=likelihood, priors=priors)