diff --git a/artifact_2_worker_binding_analysis/tests/test_core.py b/artifact_2_worker_binding_analysis/tests/test_core.py
new file mode 100644
index 0000000..92087b8
--- /dev/null
+++ b/artifact_2_worker_binding_analysis/tests/test_core.py
@@ -0,0 +1,51 @@
+import pytest
+from artifact_2_worker_binding_analysis import core
+
+
+def make_worker_data(worker_values):
+    """Hilfsfunktion zur Erzeugung einer Liste von WorkerBindingResult-ähnlichen Dicts."""
+    return [{"worker_id": wid, "population_percentage": val} for wid, val in worker_values]
+
+
+def test_analyze_worker_binding_typical_case():
+    data_enforced = make_worker_data([
+        ("w1", 40.0),
+        ("w2", 60.0),
+    ])
+    data_randomized = make_worker_data([
+        ("w1", 50.0),
+        ("w2", 50.0),
+    ])
+    result = core.analyze_worker_binding(data_enforced, data_randomized)
+    assert isinstance(result, dict)
+    # Erwartung: Ergebnis enthält Kennzahlen wie Durchschnittsunterschied oder Ähnliches
+    assert "difference_mean" in result
+    assert "workers_compared" in result
+    assert result["workers_compared"] == 2
+    # Überprüfen, ob Zahlen sinnvoll (Vergleichswert) sind
+    assert isinstance(result["difference_mean"], (float, int))
+
+
+def test_analyze_worker_binding_empty_inputs():
+    # Leere Eingaben sollten zu sinnvollem Default führen, nicht Absturz
+    result = core.analyze_worker_binding([], [])
+    assert isinstance(result, dict)
+    assert result.get("workers_compared", 0) == 0
+
+
+def test_analyze_worker_binding_mismatched_workers():
+    data_enforced = make_worker_data([("w1", 70.0)])
+    data_randomized = make_worker_data([("w2", 30.0)])
+    result = core.analyze_worker_binding(data_enforced, data_randomized)
+    # Sollte neutralen Vergleich liefern, kein Exception
+    assert isinstance(result, dict)
+    # Möglicherweise keine Overlap -> Differenzen leer oder 0
+    assert "workers_compared" in result
+
+
+def test_analyze_worker_binding_input_validation():
+    # Ungültige Typen -> Fehler
+    with pytest.raises((AssertionError, TypeError, ValueError)):
+        core.analyze_worker_binding(None, None)
+    with pytest.raises((AssertionError, TypeError, ValueError)):
+        core.analyze_worker_binding([{"wrong_field": 1}], [])
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