Add .travis.yml and test target

Author: dmjio

.travis.yml

@@ -0,0 +1,13 @@
+language: nix
+
+before_install:
+ - nix-channel --list
+ - nix-channel --update
+
+script:
+ - curl -O http://arrayfire.s3.amazonaws.com/3.6.4/ArrayFire-v3.6.4_Linux_x86_64.sh
+ - chmod +x ArrayFire-v3.6.4_Linux_x86_64.sh
+ - ./Arrayfire_*_Linux_x86_64.sh --include-subdir --prefix=/opt
+ - ls -lah /opt/arrayfire/
+ - nix-shell --run test
+

shell.nix

@@ -16,6 +16,10 @@ in
              'cabal v1-configure --enable-tests && \
                 cabal v1-build test && dist/build/test/test'
       }
+      function test () {
+        cabal v1-configure --enable-tests && \
+          cabal v1-build test && dist/build/test/test
+      }
       function doctest-runner () {
          ${pkgs.ag}/bin/ag -l | \
            ${pkgs.entr}/bin/entr sh -c \