[stdlib] Adds Update(...) and FixedWindow(...) the the standard nodes provided with bonobo.

tests/nodes/io/test_pickle.py

@@ -0,0 +1,43 @@
+import pickle
+
+import pytest
+
+from bonobo import Bag, PickleReader, PickleWriter
+from bonobo.execution.contexts.node import NodeExecutionContext
+from bonobo.util.testing import BufferingNodeExecutionContext, FilesystemTester
+
+pickle_tester = FilesystemTester('pkl', mode='wb')
+pickle_tester.input_data = pickle.dumps([['a', 'b', 'c'], ['a foo', 'b foo', 'c foo'], ['a bar', 'b bar', 'c bar']])
+
+
+def test_write_pickled_dict_to_file(tmpdir):
+    fs, filename, services = pickle_tester.get_services_for_writer(tmpdir)
+
+    with NodeExecutionContext(PickleWriter(filename), services=services) as context:
+        context.write_sync(Bag(({'foo': 'bar'}, {})), Bag(({'foo': 'baz', 'ignore': 'this'}, {})))
+
+    with fs.open(filename, 'rb') as fp:
+        assert pickle.loads(fp.read()) == {'foo': 'bar'}
+
+    with pytest.raises(AttributeError):
+        getattr(context, 'file')
+
+
+def test_read_pickled_list_from_file(tmpdir):
+    fs, filename, services = pickle_tester.get_services_for_reader(tmpdir)
+
+    with BufferingNodeExecutionContext(PickleReader(filename), services=services) as context:
+        context.write_sync(())
+        output = context.get_buffer()
+
+    assert len(output) == 2
+    assert output[0] == {
+        'a': 'a foo',
+        'b': 'b foo',
+        'c': 'c foo',
+    }
+    assert output[1] == {
+        'a': 'a bar',
+        'b': 'b bar',
+        'c': 'c bar',
+    }