wip: filesystem as a service.

tests/io/test_csv.py

@@ -1,15 +1,16 @@
 import pytest
 
-from bonobo import Bag, CsvReader, CsvWriter
+from bonobo import Bag, CsvReader, CsvWriter, open_fs
 from bonobo.constants import BEGIN, END
 from bonobo.execution.node import NodeExecutionContext
 from bonobo.util.testing import CapturingNodeExecutionContext
 
 
 def test_write_csv_to_file(tmpdir):
-    file = tmpdir.join('output.json')
-    writer = CsvWriter(path=str(file))
-    context = NodeExecutionContext(writer, None)
+    fs, filename = open_fs(tmpdir), 'output.csv'
+
+    writer = CsvWriter(path=filename)
+    context = NodeExecutionContext(writer, services={'fs': fs})
 
     context.recv(BEGIN, Bag({'foo': 'bar'}), Bag({'foo': 'baz', 'ignore': 'this'}), END)
 
@@ -18,19 +19,19 @@ def test_write_csv_to_file(tmpdir):
     context.step()
     context.stop()
 
-    assert file.read() == 'foo\nbar\nbaz\n'
+    assert fs.open(filename).read() == 'foo\nbar\nbaz\n'
 
     with pytest.raises(AttributeError):
         getattr(context, 'file')
 
 
 def test_read_csv_from_file(tmpdir):
-    file = tmpdir.join('input.csv')
-    file.write('a,b,c\na foo,b foo,c foo\na bar,b bar,c bar')
+    fs, filename = open_fs(tmpdir), 'input.csv'
+    fs.open(filename, 'w').write('a,b,c\na foo,b foo,c foo\na bar,b bar,c bar')
 
-    reader = CsvReader(path=str(file), delimiter=',')
+    reader = CsvReader(path=filename, delimiter=',')
 
-    context = CapturingNodeExecutionContext(reader, None)
+    context = CapturingNodeExecutionContext(reader, services={'fs': fs})
 
     context.start()
     context.recv(BEGIN, Bag(), END)