Merge pull request #1125 from ethho/dev-tests-plat-151-cascade

PLAT-151: Migrate test_cascading_delete.py

Author: ethho

tests/test_cascading_delete.py

@@ -0,0 +1,119 @@
+import pytest
+import datajoint as dj
+from .schema_simple import A, B, D, E, L, Website, Profile
+from .schema import ComplexChild, ComplexParent
+
+
+@pytest.fixture
+def schema_simp_pop(schema_simp):
+    A().insert(A.contents, skip_duplicates=True)
+    L().insert(L.contents, skip_duplicates=True)
+    B().populate()
+    D().populate()
+    E().populate()
+    yield schema_simp
+
+
+class TestDelete:
+    def test_delete_tree(self, schema_simp_pop):
+        assert not dj.config["safemode"], "safemode must be off for testing"
+        assert (
+            L() and A() and B() and B.C() and D() and E() and E.F(),
+            "schema is not populated",
+        )
+        A().delete()
+        assert not A() or B() or B.C() or D() or E() or E.F(), "incomplete delete"
+
+    def test_stepwise_delete(self, schema_simp_pop):
+        assert not dj.config["safemode"], "safemode must be off for testing"
+        assert L() and A() and B() and B.C(), "schema population failed"
+        B.C().delete(force=True)
+        assert not B.C(), "failed to delete child tables"
+        B().delete()
+        assert (
+            not B()
+        ), "failed to delete from the parent table following child table deletion"
+
+    def test_delete_tree_restricted(self, schema_simp_pop):
+        assert not dj.config["safemode"], "safemode must be off for testing"
+        assert (
+            L() and A() and B() and B.C() and D() and E() and E.F()
+        ), "schema is not populated"
+        cond = "cond_in_a"
+        rel = A() & cond
+        rest = dict(
+            A=len(A()) - len(rel),
+            B=len(B() - rel),
+            C=len(B.C() - rel),
+            D=len(D() - rel),
+            E=len(E() - rel),
+            F=len(E.F() - rel),
+        )
+        rel.delete()
+        assert not (
+            rel or B() & rel or B.C() & rel or D() & rel or E() & rel or (E.F() & rel)
+        ), "incomplete delete"
+        assert len(A()) == rest["A"], "invalid delete restriction"
+        assert len(B()) == rest["B"], "invalid delete restriction"
+        assert len(B.C()) == rest["C"], "invalid delete restriction"
+        assert len(D()) == rest["D"], "invalid delete restriction"
+        assert len(E()) == rest["E"], "invalid delete restriction"
+        assert len(E.F()) == rest["F"], "invalid delete restriction"
+
+    def test_delete_lookup(self, schema_simp_pop):
+        assert not dj.config["safemode"], "safemode must be off for testing"
+        assert (
+            bool(L() and A() and B() and B.C() and D() and E() and E.F()),
+            "schema is not populated",
+        )
+        L().delete()
+        assert not bool(L() or D() or E() or E.F()), "incomplete delete"
+        A().delete()  # delete all is necessary because delete L deletes from subtables.
+
+    def test_delete_lookup_restricted(self, schema_simp_pop):
+        assert not dj.config["safemode"], "safemode must be off for testing"
+        assert (
+            L() and A() and B() and B.C() and D() and E() and E.F(),
+            "schema is not populated",
+        )
+        rel = L() & "cond_in_l"
+        original_count = len(L())
+        deleted_count = len(rel)
+        rel.delete()
+        assert len(L()) == original_count - deleted_count
+
+    def test_delete_complex_keys(self, schema_any):
+        """
+        https://github.com/datajoint/datajoint-python/issues/883
+        https://github.com/datajoint/datajoint-python/issues/886
+        """
+        assert not dj.config["safemode"], "safemode must be off for testing"
+        parent_key_count = 8
+        child_key_count = 1
+        restriction = dict(
+            {"parent_id_{}".format(i + 1): i for i in range(parent_key_count)},
+            **{
+                "child_id_{}".format(i + 1): (i + parent_key_count)
+                for i in range(child_key_count)
+            }
+        )
+        assert len(ComplexParent & restriction) == 1, "Parent record missing"
+        assert len(ComplexChild & restriction) == 1, "Child record missing"
+        (ComplexParent & restriction).delete()
+        assert len(ComplexParent & restriction) == 0, "Parent record was not deleted"
+        assert len(ComplexChild & restriction) == 0, "Child record was not deleted"
+
+    def test_delete_master(self, schema_simp_pop):
+        Profile().populate_random()
+        Profile().delete()
+
+    def test_delete_parts(self, schema_simp_pop):
+        """test issue #151"""
+        with pytest.raises(dj.DataJointError):
+            Profile().populate_random()
+            Website().delete()
+
+    def test_drop_part(self, schema_simp_pop):
+        """test issue #374"""
+        with pytest.raises(dj.DataJointError):
+            Website().drop()