add test function

Author: florence-bockting

pyproject.toml

@@ -278,7 +278,7 @@ source = [
 branch = true
 
 [tool.coverage.report]
-fail_under = 0  # TODO
+fail_under = 0  # TODO; old value: 90
 skip_empty = true
 show_missing = true
 exclude_also = [

src/pymc_elicito/__init__.py

@@ -1,7 +1,24 @@
 """
-Learning prior distributions for model parameters in a Bayesian model based on expert information.
+A framework for expert prior elicitation in Python.
+
+Learn prior distributions for parameters in a Bayesian
+model based on expert information.
 """
 
 import importlib.metadata
 
 __version__ = importlib.metadata.version("pymc_elicito")
+
+__all__ = ["hello_world"]
+
+
+def hello_world() -> str:
+    """
+    Print hello world
+
+    Returns
+    -------
+    :
+        hello world
+    """
+    return "hello world"

tests/unit/test_init.py

@@ -0,0 +1,12 @@
+"""
+Unit test for __init__.py
+"""
+
+from pymc_elicito import hello_world
+
+
+def test_hello_world():
+    observed = hello_world()
+    expected = "hello world"
+
+    assert observed == expected