doc: complete readme with the callback capability
1 files changed, 10 insertions(+), 0 deletions(-)

M README.md
M README.md +10 -0
@@ 26,6 26,16 @@ From this, in test modules, one can use 
         assert name == 'Babar'
 ```
 
+If there is a schema initialization function, it can also be given to
+`engine_fixture`:
+
+```python
+    from myapp import schema
+    engine = fixture.engine_fixture(schema.meta, 'data', 5433,
+                                    # must accept `engine` and `meta` objects
+                                    schema.init)
+```
+
 ## DIRECTLY USING THE POSTGRES CLUSTER HANDLER