From f0035cf25961b037b675a18a02ef8a3ebbac3a0f Mon Sep 17 00:00:00 2001
From: Ben Krikler <bek07@ic.ac.uk>
Date: Mon, 5 Aug 2019 17:47:23 +0200
Subject: [PATCH 1/2] Add changelog

---
 CHANGELOG.md | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 CHANGELOG.md

diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..40c92a2
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,28 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+### Added
+- Adds support for masking variables in their definition, issue #59 [@benkrikler](https://github.com/benkrikler)
+- Adds several constants for variable expressions, issue #21 [@benkrikler](https://github.com/benkrikler)
+- Added this changelog [@benkrikler](https://github.com/benkrikler)
+
+### Changed
+- Use `pandas.groupby(..).counts()` to make binned dataframes, issue #51 [@benkrikler](https://github.com/benkrikler)
+
+### Removed
+
+## [0.13.0] - 2019-07-28
+### Added
+- Add support for multiple output file types for binned dataframes, issue #57 [@asnaylor](https://github.com/asnaylor)
+
+### Changed
+- Fix issue with binned dataframe expressions and multiple similar branch names, issue #60 [@benkrikler](https://github.com/benkrikler)
+- Enable multiple cut-flow stages and make the input chunk.tree have consistent array and arrays methods, issue #61 [@benkrikler](https://github.com/benkrikler)
+
+### Removed
+
+## [0.12.0] - 2019-05-28

From 564e143e6d19daf87d0fb6cfe66021e6b3ba8f64 Mon Sep 17 00:00:00 2001
From: Ben Krikler <bek07@ic.ac.uk>
Date: Mon, 5 Aug 2019 18:49:06 +0200
Subject: [PATCH 2/2] Will be releasing the update today, so put this in
 changelog

---
 CHANGELOG.md                  | 7 +++++++
 tests/selection/test_stage.py | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 40c92a2..c9da54b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 ### Added
+
+### Changed
+
+### Removed
+
+## [0.13.1] - 2019-08-05
+### Added
 - Adds support for masking variables in their definition, issue #59 [@benkrikler](https://github.com/benkrikler)
 - Adds several constants for variable expressions, issue #21 [@benkrikler](https://github.com/benkrikler)
 - Added this changelog [@benkrikler](https://github.com/benkrikler)
diff --git a/tests/selection/test_stage.py b/tests/selection/test_stage.py
index 83611c7..f412cfe 100644
--- a/tests/selection/test_stage.py
+++ b/tests/selection/test_stage.py
@@ -148,3 +148,5 @@ def test_sequential_stages(cutflow_1, select_2, infile, full_event_range, tmpdir
     cutflow_2.event(chunk)
 
     assert len(chunk.tree) == 2
+    jet_py = chunk.tree.array("Jet_Py")
+    assert pytest.approx(jet_py.flatten()) == [49.641838, 45.008915, -78.01798, 60.730812]