Run travis tests on OS X

.travis.yml

@@ -1,24 +1,26 @@
 sudo: false
-os:
-  - linux
 language: cpp
-compiler: clang
-addons:
+
+matrix:
+  include:
+    - os: linux
+      compiler: clang
+      env: COMPILER=clang++-3.6
+      addons:
          apt:
-    sources:
-    - ubuntu-toolchain-r-test
-    - llvm-toolchain-precise-3.6
-    packages:
-    - zlib1g-dev
-    - libbz2-dev 
-    - libsnappy-dev
-    - clang-3.6
+            sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-precise-3.6']
+            packages: ['clang-3.6', 'zlib1g-dev', 'libbz2-dev', 'libsnappy-dev']
+    - os: osx
+      compiler: clang
 
-env: COMPILER=clang++-3.6
+before_script:
+    - if [ -n "${COMPILER}" ]; then CXX=${COMPILER}; fi
+    - if [[ $(uname -s) == 'Darwin' ]]; then brew install snappy; fi
 
 # Lousy hack to disable use and testing of fallocate, which doesn't behave quite
 # as EnvPosixTest::AllocateTest expects within the Travis OpenVZ environment.
-script: CXX=$COMPILER OPT=-DTRAVIS V=1 make unity && make clean && CXX=$COMPILER OPT=-DTRAVIS V=1 make db_test && ./db_test && CXX=$COMPILER OPT=-DTRAVIS V=1 make clean jclean rocksdbjava jtest
+script: OPT=-DTRAVIS V=1 make db_test && ./db_test && OPT=-DTRAVIS V=1 make clean jclean rocksdbjava jtest
+
 notifications:
     email: false
     webhooks: