tests: Add unit tests for the experiment repo (#570)

Closes #570

Signed-off-by: Dimitris Poulopoulos <dimitris@mozilla.ai>

lumigator/python/mzai/backend/backend/tests/unit/repositories/test_experiments.py

@@ -0,0 +1,39 @@
+import uuid
+
+import pytest
+from lumigator_schemas.jobs import JobStatus
+from sqlalchemy.exc import IntegrityError
+
+from backend.repositories.experiments import ExperimentRepository
+from backend.repositories.jobs import JobRepository
+
+
+@pytest.fixture
+def experiment_repository(db_session):
+    return ExperimentRepository(db_session)
+
+
+@pytest.fixture
+def job_repository(db_session):
+    return JobRepository(db_session)
+
+
+def test_create_and_get_experiment(experiment_repository):
+    created_experiment = experiment_repository.create(name="test", description="")
+    retrieved_experiment = experiment_repository.get(created_experiment.id)
+    assert created_experiment.id == retrieved_experiment.id
+    assert created_experiment.name == retrieved_experiment.name
+    assert created_experiment.status == JobStatus.CREATED
+
+
+def test_experiment_foreign_key(job_repository):
+    random_id = uuid.uuid4()
+    with pytest.raises(IntegrityError):
+        job_repository.create(name="test", description="", experiment_id=random_id)
+
+
+def test_duplicate_results_error(experiment_repository, job_repository):
+    experiment = experiment_repository.create(name="test", description="")
+    job_repository.create(name="test", description="", experiment_id=experiment.id)
+    with pytest.raises(IntegrityError):
+        job_repository.create(name="test", description="", experiment_id=experiment.id)