Revert "Reorganization"

This reverts commit f44c888a

state/test/test_create_node.py

@@ -0,0 +1,22 @@
+import pytest
+
+
+@pytest.mark.usefixtures("state")
+def test_create_node_different_id_simple(state):
+    id1 = state.create_node()
+    assert id1 is not None
+    id2 = state.create_node()
+    assert id2 is not None
+
+    assert id1 != id2
+
+
+@pytest.mark.usefixtures("state")
+def test_create_node_different_id_long(state):
+    results = set()
+    for i in range(1000):
+        v = state.create_node()
+        assert v is not None
+        results.add(v)
+
+    assert len(results) == 1000