add e2e test prototype

tests/e2e/CMakeLists.txt

@@ -40,6 +40,7 @@ add_subdirectory(write_procedures)
 add_subdirectory(magic_functions)
 add_subdirectory(module_file_manager)
 add_subdirectory(monitoring_server)
+add_subdirectory(util_e2e)
 
 copy_e2e_python_files(pytest_runner pytest_runner.sh "")
 file(COPY ${CMAKE_CURRENT_SOURCE_DIR}/memgraph-selfsigned.crt DESTINATION ${CMAKE_CURRENT_BINARY_DIR})

tests/e2e/util_e2e/CMakeLists.txt

@@ -0,0 +1,5 @@
+function(copy_util_e2e_python_files FILE_NAME)
+    copy_e2e_python_files(write_procedures ${FILE_NAME})
+endfunction()
+
+copy_util_e2e_python_files(simple_case_nullcheck.py)

tests/e2e/util_e2e/simple_case_nullcheck.py

@@ -0,0 +1,23 @@
+import typing
+import mgclient
+import sys
+import pytest
+
+
+def test_nullcheck_yields_error(connection):
+    cursor = connection.cursor()
+    query = """WITH 2 AS name
+                RETURN CASE name
+                WHEN 3 THEN 'works'
+                WHEN null THEN "doesn't work"
+                ELSE 'something went wrong'
+                END"""
+
+    cursor.execute(query)
+    row = cursor.fetchone()
+
+    assert row == "Use the generic form when checking against NULL."
+
+
+if __name__ == "__main__":
+    sys.exit(pytest.main([__file__, "-rA"]))

tests/e2e/util_e2e/workloads.yaml

@@ -0,0 +1,13 @@
+template_cluster: &template_cluster
+  cluster:
+    main:
+      args: ["--bolt-port", "7687", "--log-level=TRACE"]
+      log_file: "util-e2e.log"
+      setup_queries: []
+      validation_queries: []
+
+workloads:
+  - name: "CASE throws if simple form is used and checking against NULL"
+    binary: "tests/e2e/pytest_runner.sh"
+    args: ["util_e2e/simple_case_nullcheck.py"]
+    <<: *template_cluster