travis: Use docker to test 32bit environment (#189)

* travis: testing matrix.include feature to use docker
* Add test script for 32bit
* Fix OverflowError in 32bit Environment

.travis.yml

@@ -1,23 +1,39 @@
 sudo: false
+language: python
+python: 3.5
 cache:
   directories:
     - $HOME/.cache/pip
-language: python
-python:
-    - 3.5
 
 branches:
-    only:
-        - master
+  only:
+    - master
 
 env:
-    - TOXENV=py27-c,py33-c,py34-c,py35-c
-    - TOXENV=py27-pure,py33-pure,py34-pure,py35-pure
-    - TOXENV=pypy-pure,pypy3-pure
+  - TOXENV=py27-c,py33-c,py34-c,py35-c
+  - TOXENV=py27-pure,py33-pure,py34-pure,py35-pure
+  - TOXENV=pypy-pure,pypy3-pure
+
+matrix:
+  include:
+    - sudo: required
+      services:
+        - docker
+      env:
+        - DOCKER_IMAGE=quay.io/pypa/manylinux1_i686
+      install:
+        - pip install -U pip
+        - pip install cython
+        - cython --cplus msgpack/_packer.pyx msgpack/_unpacker.pyx
+        - docker pull $DOCKER_IMAGE
+      script:
+        - docker run --rm -v `pwd`:/io -w /io $DOCKER_IMAGE /io/docker/runtests.sh
 
 install:
-    - pip install -U pip
-    - pip install tox cython
-    - cython --cplus msgpack/_packer.pyx msgpack/_unpacker.pyx
+  - pip install -U pip
+  - pip install tox cython
+  - cython --cplus msgpack/_packer.pyx msgpack/_unpacker.pyx
 
 script: tox
+
+# vim: sw=2 ts=2

docker/runtests.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+set -e -x
+
+for V in cp35-cp35m cp34-cp34m cp27-cp27m cp27-cp27mu; do
+    PYBIN=/opt/python/$V/bin
+    $PYBIN/python setup.py install
+    rm -rf build/       # Avoid lib build by narrow Python is used by wide python
+    $PYBIN/pip install pytest
+    pushd test          # prevent importing msgpack package in current directory.
+    $PYBIN/python -c 'import sys; print(hex(sys.maxsize))'
+    $PYBIN/python -c 'from msgpack import _packer, _unpacker'
+    $PYBIN/py.test -v
+    popd
+done

msgpack/_packer.pyx

@@ -272,7 +272,7 @@ cdef class Packer(object):
         msgpack_pack_ext(&self.pk, typecode, len(data))
         msgpack_pack_raw_body(&self.pk, data, len(data))
 
-    def pack_array_header(self, size_t size):
+    def pack_array_header(self, long long size):
         if size > ITEM_LIMIT:
             raise PackValueError
         cdef int ret = msgpack_pack_array(&self.pk, size)
@@ -285,7 +285,7 @@ cdef class Packer(object):
             self.pk.length = 0
             return buf
 
-    def pack_map_header(self, size_t size):
+    def pack_map_header(self, long long size):
         if size > ITEM_LIMIT:
             raise PackValueError
         cdef int ret = msgpack_pack_map(&self.pk, size)