Test from Liam

tests/test_liam.py

@@ -0,0 +1,36 @@
+from unittest import TestCase
+from pympipool import PyMPIExecutor
+
+
+def add_two(x):
+    return x + 2
+
+
+class TestPyMPIExecutor(TestCase):
+
+    def test_local(self):
+        # Works perfectly
+        def add_one(x):
+            return x + 1
+
+        class Foo:
+            def add(self, x):
+                return add_one(x)
+
+        foo = Foo()
+        executor = PyMPIExecutor()
+        fs = executor.submit(foo.add, 1)
+        self.assertEqual(2, fs.result())
+
+    def test_semi_local(self):
+        # Hangs
+        # CI logs make it look like cloudpickle is trying to import from this module,
+        # but can't find it
+        class Foo:
+            def add(self, x):
+                return add_two(x)
+
+        foo = Foo()
+        executor = PyMPIExecutor()
+        fs = executor.submit(foo.add, 1)
+        self.assertEqual(3, fs.result())