add tests to ensure desired behaviour

tests/nodes/test_hip_script.py

@@ -0,0 +1,60 @@
+import random
+import ast
+from asyncio import Event
+from lifeblood.scheduler import Scheduler
+from lifeblood.worker import Worker
+from lifeblood.nodethings import ProcessingError
+from lifeblood_testing_common.nodes_common import TestCaseBase, PseudoContext
+
+from typing import List
+
+
+class TestHipScript(TestCaseBase):
+    async def test_trivial(self):
+        async def _logic(sched: Scheduler, workers: List[Worker], done_waiter: Event, context: PseudoContext):
+            task = context.create_pseudo_task_with_attrs({})
+
+            node = context.create_node('hip_script', 'footest')
+
+            node.set_param_value('hip path', '/tmp/some/path/stuff.hip')
+            node.set_param_value('script', 'do_things()')
+
+            res = context.process_task(node, task)
+            script = res.invocation_job.extra_files()['work_to_do.py']
+            ast.parse(script)
+
+        await self._helper_test_node_with_arg_update(
+            _logic
+        )
+
+    async def test_empty_script(self):
+        async def _logic(sched: Scheduler, workers: List[Worker], done_waiter: Event, context: PseudoContext):
+            task = context.create_pseudo_task_with_attrs({})
+
+            node = context.create_node('hip_script', 'footest')
+
+            node.set_param_value('hip path', '/tmp/some/path/stuff.hip')
+            node.set_param_value('script', '')
+
+            res = context.process_task(node, task)
+            script = res.invocation_job.extra_files()['work_to_do.py']
+            ast.parse(script)
+
+        await self._helper_test_node_with_arg_update(
+            _logic
+        )
+
+    async def test_empty_hip_path(self):
+        async def _logic(sched: Scheduler, workers: List[Worker], done_waiter: Event, context: PseudoContext):
+            task = context.create_pseudo_task_with_attrs({})
+
+            node = context.create_node('hip_script', 'footest')
+
+            node.set_param_value('hip path', '')
+            node.set_param_value('script', '')
+
+            self.assertRaises(ProcessingError, context.process_task, node, task)
+
+        await self._helper_test_node_with_arg_update(
+            _logic
+        )